Other Crane Rail Fasteners & Hardware
Our general fastener range follows the supplier catalogue: two material parts — carbon steel and stainless steel — each organised into eleven product series. Every item is produced to its GB/T, DIN or WI standard reference, with mill test certificates traceable to heat number. Send a drawing, a standard number or a bill of materials and we will quote against it.
Carbon Steel Series
Grades 4.8 to 12.9, self-colour, black oxide, zinc plated or hot-dip galvanized. Every series below is also available in stainless steel under Part 02.
Bolts8 items · hex head, special head, anchor and bent forms
Hex Head BoltsGB 30 · GB/T 5782 & 5783 · DIN 931/933
The general-purpose hex head bolt, partially threaded (GB/T 5782 / DIN 931) or fully threaded (GB/T 5783 / DIN 933); the legacy GB 30 type is kept for older equipment.
M4 – M42 · Gr. 4.8 – 10.9 · self colour / black / HDG / Zn
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Fine Pitch Hex Head BoltsGB/T 5785 & 5786
Hex head bolts with fine-pitch threads for high-tension joints and fine adjustment, where a coarse thread would loosen under vibration or where the clamp length is short.
M8 – M30 · Gr. 8.8 / 10.9 / 12.9
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Hex Flange BoltsGB/T 5787
The flange forged under the head spreads the clamping load and replaces a separate washer; the serrated bearing face grips the joint and resists loosening on vibrating assemblies.
M6 – M12 · Gr. 8.8
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Square Head BoltsGB 35
Large flat wrench faces let the bolt be held from two sides in blind locations — the traditional choice for clamping fixtures, press tooling and T-slot work.
M8 – M20 · Gr. 8.8
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T-Head BoltsGB/T 37
The forged T-head drops into a T-slot or clip channel and seats with a quarter turn — the standard bolt for machine tables, fixtures and rail clamping plates. See also our rail fastening bolts.
M8 – M36 · Gr. 6.8 / 8.8
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Pivot Bolts (Swing Bolts)GB/T 798
The eye-shaped head swivels freely on the shank, so the bolt can be dropped over a pin and tightened with a single spanner — used on clamps, quick-release covers and latch plates.
M8 – M36 · Gr. 4.6 / 4.8
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Anchor Bolts (Foundation Bolts)GB/T 799
Cast-in foundation bolts for baseplates, rail plinths and equipment feet. For the full bent range — split, J, U and C forms with corrugated sleeves — see our rail anchor systems page.
M12 – M48 · Gr. 4.8
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U-BoltsW 01.6 · to drawing
Formed into a U to clamp pipes, tubes and steel sections directly onto a plate or foundation. Inside radius, leg length and pitch made to your drawing, thread rolled.
M6 – M24 · Gr. 4.8 · self colour / HDG
View detailsStuds & Threaded Rod3 items
Threaded Rods (Full-Thread Studs)GB/T 15389
Continuously threaded rod supplied in stock lengths or cut to size — the base material for hangers, supports and any stud bolt made to a specific grip length.
M3 – M64 · Gr. 8.8 / 10.9 / 12.9
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Double End StudsGB/T 901
Threaded at both ends with a plain grip in the middle: the stud screws into the tapped body and takes a nut on top — standard practice for flanged joints and housings.
M8 – M45 · Gr. 4.8 / 8.8 / 10.9
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Arc Weld Studs (Headed Shear Studs)GB/T 10433
Welded through a ceramic ferrule onto steel beams to act as shear connectors in composite steel-concrete decks and for studding of plant components.
M13 – M19 · Gr. 4.8 · self colour
View detailsScrews5 items · socket, cross recessed and set screws
Socket Head Cap ScrewsGB/T 70.1 · DIN 912
High-strength cylindrical-head screws driven by a hex key; the compact head carries high torque and fits into pockets — the machine builder's screw, grades 8.8 to 12.9.
M3 – M56 · Gr. 8.8 / 10.9 / 12.9
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Socket Button Head ScrewsISO 7380
Low-profile domed head with a smooth appearance; for guards, covers and anywhere a protruding hex head or sharp edge is unwanted.
M4 – M20 · Gr. 8.8
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Socket Countersunk Head ScrewsDIN 7991
90° countersunk head sits flush with the surface — for sliding parts, guide ways and any assembly where clearance above the head is critical.
M3 – M24 · Gr. 8.8 / 10.9
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Cross Recessed Pan & Countersunk Head ScrewsGB/T 818 · GB/T 819
Machine screws for light-duty metal and panel assembly, driven with a Phillips bit; pan head sits proud, countersunk head sits flush with the countersink.
M3 – M12 · Gr. 4.8 · white Zn
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Set ScrewsGB/T 71 · 73 · 77 · 78 · DIN 916
Headless screws that lock components onto shafts and in tapped holes. Point options: cone point digs into the shaft, flat point bears on the surface, cup point for general grip; slotted and hex socket drives.
M3 – M16 · Gr. 4.8 / 14H / 45H
View detailsNuts11 items · hex, flange, lock, weld and lifting
Hex Nuts, Style 1GB/T 6170 · GB 52 · fine pitch GB/T 6171
The standard hex nut in coarse thread, with fine pitch available; matched to the hex bolt series in grades 4.8 to 10, self colour, black, zinc plated or hot-dip galvanized.
M5 – M90 · Gr. 4 / 5 / 8 / 10
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Hex Thin Nuts (Jam Nuts)GB/T 6172.1 · fine pitch GB/T 6173
Reduced-height nuts used as a jam nut against a full nut, or wherever the installed height of a standard nut will not fit.
M8 – M56 · Gr. 4 / 8
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Hex Flange Nuts, Style 2GB/T 6177.1
The flange under the nut works as an integrated washer and spreads the load; on the serrated version the bearing face bites into the joint to resist vibration.
M3 – M20 · Gr. 8 / 10
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Nylon Insert Hex Lock NutsDIN 985
Prevailing-torque lock nut with a nylon collar: self-locking at any position on the thread without damaging the bolt. Service temperature limited to about +120 °C.
M3 – M64 · Gr. 4.8 / 10 / A2-50 / A2-70
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All-Metal Hex Lock NutsGB/T 6184
All-metal prevailing-torque nut — the deformed thread section keeps the locking action at elevated temperature and in oil, where a nylon collar would fail.
M5 – M16 · Gr. 8 / 10
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All-Metal Flange Lock NutsGB/T 6187
All-metal lock nut with an integral flange — one part provides both preload retention and load spreading on sheet and thin-flange joints.
M5 – M16 · Gr. 8
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Domed Cap NutsGB/T 923
The enclosed dome covers the thread end — protection against injury and corrosion plus a clean appearance on exposed fasteners.
M4 – M20 · Gr. 4 / 8
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Wing NutsGB/T 62.2
Square-wing type tightened by hand — for covers, clamps and adjustments that are opened regularly without tools.
M3 – M16 · Gr. A3 / self colour
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Round NutsGB/T 812
Slotted round nuts for shaft ends and bearing adjustment, tightened with a hook spanner and locked by a tab washer against the keyway.
M10 – M200 · self colour
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Weld NutsGB/T 13680 (square, type A) · GB/T 13681 (hex)
Welded to sheet and plate to create a permanent machine thread where the back of the joint cannot be reached — the basis of most welded fastener panels.
M4 – M16 · self colour
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Eye Nuts (Lifting)DIN 582
Forged lifting eye nuts with metric threads for hoisting points. Observe the marked working load limit, seat fully on the face and never side-load a single eye.
M6 – M48 · Gr. 4
View detailsSelf-Tapping & Self-Drilling Screws5 items · sheet and light section fixings
Pan Head Self-Tapping ScrewsGB/T 845
Form their own thread in sheet metal, plastics and plywood — no tapping operation needed. Cross recessed pan head, case-hardened.
ST3.5 – ST6 · case hardened · blue-white Zn
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Countersunk Head Self-Tapping ScrewsGB/T 846
Flat countersunk version of the self-tapping screw for flush panel and trim fixing in sheet and plastic.
ST3.5 – ST6 · case hardened · blue-white Zn
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Drywall ScrewsGB/T 14210
Bugle-head screw for fixing gypsum board to steel or timber studs; the curved bearing face spreads the pressure so the paper face does not tear.
M3.5 · case hardened · black phosphate
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Hex Washer Head Self-Drilling ScrewsGB/T 15856.4
Drill, tap and fasten in a single operation with an impact driver — the standard fixing for roofing sheets and cladding on purlins.
ST4.2 – ST6.3 · case hardened · Zn
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Pan & Countersunk Self-Drilling ScrewsGB/T 15856.1 · 15856.2
Self-drilling screws with cross recessed heads for light-gauge sheet work where a hex head is not wanted.
ST4.2 – ST5.3 · case hardened · Zn
View detailsWashers4 items
Flat Washers, Grade AGB/T 97.1
Precision flat washers that spread the clamping load and protect the fastened surface; hardened versions for structural bolting.
Ø3 – 64 · 100 HV / 200 HV
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Spring Lock WashersGB/T 93
Helical spring washers that keep tension under slight movement and resist the nut backing off on assemblies subject to vibration.
Ø3 – 64 · 430 – 510 HV
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Square Taper WashersGB/T 853
Square washers with a tapered seat that squares up the bolt head or nut on the sloped flange of channel and I-beam sections.
Ø3 – 36 · 100 HV
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Tab Washers for Round NutsGB/T 859
The internal tab locks into the shaft keyway and the outer tabs are bent up against the round nut flanks, positively locking the adjustment.
Ø10 – 200 · 100 HV
View detailsRetaining Rings3 items
External Retaining Rings (Shafts)GB/T 894.1
Snap into a groove on the shaft to hold bearings, gears and sleeves axially — no shoulder or nut required on the shaft.
Ø8 – 200 · 430 – 510 HV
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Internal Retaining Rings (Bores)GB/T 893.1
Spring into a groove in the housing bore and locate components from inside the housing — matched to the external series.
Ø8 – 200 · 430 – 510 HV
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Open Type Retaining RingsGB/T 896
Open rings pushed onto small shafts by hand or with pliers — light-duty axial retention on small mechanisms.
Ø3 – 12 · black / self colour
View detailsKeys & Pins7 items
Split Pins (Cotter Pins)GB/T 91
Folded-leg pins passed through a castellated nut and cross-drilled bolt to positively prevent the nut backing off; the legs are bent apart after fitting.
Ø1 – 16 · self colour
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Parallel Pins (Dowel Pins)GB/T 119.1, m6 tolerance
Precision ground pins pressed into reamed holes for repeatable positioning of mating parts — the reference location in tooling and machine assembly.
Ø3 – 20 · polished, unhardened
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Threaded Parallel Pins (Pull-Out Dowels)GB/T 120.1
Dowel pins with an internal thread so they can be screwed out of blind reamed holes — for tooling that is stripped regularly.
Ø6 – 20 · polished
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Taper PinsGB/T 117 · threaded version GB/T 118
The 1:50 taper self-locks in the tapered hole and is driven out from the small end; the threaded version is withdrawn through its internal thread from blind holes.
Ø3 – 20 · polished
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Slotted Spring Pins, Heavy DutyGB/T 879.1
Compress on insertion and grip by spring force — tolerant of hole tolerance and shock loading, with no reaming operation needed.
Ø2.5 – 16 · 420 – 560 HV30
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Clevis PinsGB/T 882
Headed pins retained by a split pin through the cross hole — the pivot of linkages, toggles, cylinder eyes and rigging links.
Ø6 – 20 · self colour
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Parallel Keys, Type AGB/T 1096
Square-section machine keys that transmit torque between shaft and hub; type A has rounded ends to match an end-milled keyway.
From 6 × 6 · self colour
View detailsBolt & Screw Assemblies5 items · captive washer and structural sets
High-Strength Structural Bolt SetsGB/T 1228 · 1229 · 1230
Matched sets of large hex bolts, nuts and washers for friction-grip structural steel connections; supplied lot-controlled with test certificates.
M16 – M30 · Gr. 10.9S
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Torshear Type HSFG Bolt SetsGB/T 3632
TC bolts whose grooved end shears off at the correct preload — correct installation tension is verified visually by the sheared splined tip.
M16 – M24 · Gr. 10.9S
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Pan Head Screw & Washer AssembliesGB/T 9074.4 · 9074.8
SEMS screws with a captive flat washer — nothing to drop, sort or mis-assemble on the assembly line.
M3 – M6 · Gr. 4.8 · Zn
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Hex Bolt & Washer AssembliesGB/T 9074.13 · 9074.17
Hex bolts (including the concave-cross version) assembled with a captive flat washer for faster, mistake-free installation.
M4 – M8 · Gr. 4.8 · Zn
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Socket Cap Screw & Washer AssembliesBased on GB/T 70.1
Cylinder head screws with captive washers for machine building where a hex key drive and high preload are required.
M4 – M8 · Gr. 4.8 · Zn
View detailsRigging Hardware7 items · turnbuckles, shackles, wire rope fittings
Turnbuckles, CC Type (Hook & Hook)GB 561, light & heavy duty
Closed-body turnbuckles with a hook on each end for quick hook-on tensioning of stays, guys and bracing wires; rotate the body to adjust length under load.
M8 – M24 · HDG / self colour · Gr. 4.8
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Turnbuckles, CO Type (Hook & Eye)GB 561, light & heavy duty
One hook end, one eye end — the eye is tied or spliced to the rope while the hook takes the fixed point; the general-purpose stay adjuster.
M8 – M36 · HDG / self colour · Gr. 4.8
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Turnbuckles, OO Type (Eye & Eye)GB 561, light & heavy duty
Eye on both ends for permanent swaged or spliced rope terminations — the choice where hooks would risk disengagement.
M10 – M36 · HDG / self colour · Gr. 4.8
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Heavy-Duty Dee ShacklesWI 4.15a
Narrow dee body for in-line pulls on lifting gear, hoist rings and anchor points where the load stays on the shackle axis.
Ø10 – 65 · HDG / white Zn · Gr. 4.8
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Bow Shackles, High-Tensile & US-Type ForgedWI 4.43 · WI 4.11
The bow body accepts multi-leg and angular sling loads. Full forged US-type anchor shackles available in imperial sizes 5/8" – 2".
Ø13 – 50 / 5/8" – 2" · Gr. 10.9 / forged
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Wire Rope Clips, AssembledWI 4.8
U-bolt, saddle and nuts supplied as one set — two or three clips form an eye in wire rope; always saddle the live rope side, never the tail.
Ø5 – 64 · HDG / white Zn · Gr. 4.8
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Wire Rope ThimblesWI 4.5b
Set into the rope eye to preserve the rope's natural curvature and protect it from crushing and wear at the terminations.
Ø6 – 50 · self colour · Gr. 4.8
View detailsExpansion & Chemical Anchors8 items · post-installed fixings into concrete
Chemical AnchorsWI 2.3
Threaded rod set in injection resin — no expansion stress, so anchor spacing and edge distances can be tight; the choice for cracked concrete and close-to-edge fixings.
M8 – M30 · Gr. 4.8 · Zn
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Sleeve AnchorsWI 2.31c
Torque-set expansion anchors for general concrete and masonry; removable and re-usable, with a hex head or nut end.
M6 – M20 · Gr. 4.8 · self colour / HDG / Zn
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Hook Sleeve AnchorsWI 2.31e
Sleeve anchor with a hook end for hanging and restraining light fixtures, signs and guard rails.
M6 – M12 · Gr. 4.8 · Zn
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Elevator Expansion BoltsWI 2.2a
The specified fixing for elevator guide-rail brackets and machine-room equipment, with a flanged collar that seats on the rail clip.
M12 – M16 · Gr. 4.8 · Zn
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Internally Threaded (Drop-In) AnchorsWI 2.16a
Flush, internally threaded anchors set below the surface with a driving tool — the standard insert for hanging threaded rod from concrete, including overhead work.
M6 – M20 · Gr. 4.8 · Zn
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Vehicle-Maintenance Expansion BoltsWI 2.27
Heavy expansion bolts specified in workshop and vehicle-maintenance installations; long expansion sleeve gives a wide, low-stress grip.
M8 – M20 · Gr. 4.8 · Zn
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Hammer-Drive Expansion BoltsWI 2.29c
Nail-type anchors driven in with a hammer — the fast way to fix bottom plates, duct runs and light brackets to concrete.
M8 – M20 · Gr. 4.8 · Zn
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Hex Cone-Cap Expansion BoltsWI 2.34j
Hex head anchor with a cone-ended sleeve for positive, controlled expansion in concrete.
M6 – M12 · Gr. 4.8 · Zn
View detailsStainless Steel Series
The same eleven series supplied in AISI 304 / 316 (A2-50, A2-70, A4-70 property classes) — plus the carriage bolt and rivet series below. Product photos from Part 01 apply; only the material and property class change. Specify the corrosive environment and we will recommend 304 or 316.
Hex Bolts, Screws, Nuts & WashersGB/T 5782 · DIN 912 · DIN 934 · GB/T 97 · DIN 985
Hex head bolts M6–M36, socket cap and countersunk screws, cross recessed screws, set screws, hex / flange / lock / cap / wing / weld / eye nuts, flat and spring washers and external / internal retaining rings — all in 304 and 316.
View stainless rangeStuds, Pivot Bolts & Threaded RodGB/T 798 · GB/T 15389
Stainless pivot bolts M8–M24 and full-thread rod M3–M36 in A2-70 / A4-70, cut to length and threaded to order.
View stainless rangeSelf-Drilling & Self-Tapping ScrewsGB/T 845 · 846 · 15856.1/.2/.4
Pan head, countersunk head and hex washer head types in 304, ST4.2–ST6.3 — for coastal roofing, cladding and wash-down areas.
View stainless rangeKeys, Pins & AssembliesGB/T 91 · 119.1 · 879.1 · 9074.8 · 9074.17
Split pins, parallel pins, heavy-duty slotted spring pins and screw-washer assemblies in 304 / 316.
View stainless rangeCarriage Bolts (Round Head Square Neck)GB/T 12
Round head with a square neck that locks in the hole as the nut is tightened — used on timber construction and wherever a smooth, low head is wanted. 304, M6–M12, A2-70.
View detailsRivets & Blind RivetsGB/T 109 · 867 · 12617 · 12618
Solid rivets with flat head (GB/T 109) and round head (GB/T 867); open-type blind (pop) rivets with countersunk head (GB/T 12617) and dome head (GB/T 12618) — set from one side only, for closed sections and single-side access panels. Ø3–6.4, A2-70.
View detailsStainless Expansion AnchorsWI 2.31c · 2.31e · 2.16a · 2.27
Sleeve anchors, hook sleeve anchors, internally threaded drop-in anchors and vehicle-maintenance expansion bolts in 304 — for coastal structures, water treatment and food plant.
View stainless rangeRigging Hardware in StainlessTurnbuckles · shackles · thimbles
Turnbuckles, shackles, wire rope clips and thimbles in 304 / 316 for marine, coastal and chemical environments.
View stainless rangeMaterials, Grades & Coatingconfirm the combination against exposure conditions before ordering
Carbon steel
Q235B, 45#, 40Cr, 35CrMo, 42CrMo — grades 4.8, 8.8, 10.9, 12.9; metric, DIN, ANSI and BS threads
Stainless steel
304 / 316 / 201, A2-50, A2-70, A4-70; passivated finish; anti-galling coating available on request
Surface protection
Hot-dip galvanizing to ISO 1461 / ASTM A153 (min. 70 µm); blue-white and colour zinc; Zn-Al flake; black oxide
Documentation
Mill test certificate EN 10204 3.1 with heat-number traceability; lot-controlled packing on request
Why stainless fasteners gall (seize)
During tightening, the oxide films on stainless threads rupture and weld metal-to-metal under pressure and heat. Galling builds with each of these factors:
- Material characteristics — high ductility, poor heat conduction, passive oxide film
- Clamping force beyond the safe torque for the thread size
- Side loading or a tilted bolt during tightening
- Wrong tool, or an impact driver running at full speed
- Dirt or contamination carried into the thread
How we prevent it
- Tighten to the safe torque table for the thread size — never to feel
- Pull the wrench along the bolt axis; keep the bolt square to the hole
- Slow speed on power tools; finish by hand
- Specify our anti-galling coated stainless fasteners (RoHS-compliant coating, batch tested)
- Keep threads clean; use lubricant or anti-seize where dismantling is expected
Critical applications: rail fastening, curtain-wall and facade connections, flange joints, work-at-height installations and power-tool driven fixings.
Send your fastener list
Standard number, size, grade and coating are enough for us to quote. Mixed carbon and stainless lists and small quantities are welcome — send the file and we will come back with a full offer.
