The head has to match the channel. Channel is described by two numbers the lip opening and the channel depth, such as 28/15  and a hammer head sized for one profile will not seat in another.

The wrong head either drops straight through or sits on the lip instead of under it, which looks tight and carries almost nothing. Send us the channel profile or a photograph of the section and we will match it.

Specification. Property classes 4.6 and 8.8 to ISO 898-1, or A2-70 and A4-70 stainless to ISO 3506-1. M8 to M20 in standard lengths, longer to order. Finishes: zinc plated to ISO 4042 for dry interiors, hot-dip galvanized to ISO 1461 and ISO 10684 for anything outdoors in the Gulf, and zinc flake to ISO 10683 where a high-strength class must be coated without embitterment risk.

Supplied with matching nuts and washers, and an EN 10204 3.1 certificate with every delivery.

How the head seats, the three head forms, and the three ways it goes wrong: see our  hammer bolt technical page. 

Two types. Splice bolts join one rail panel to the next and are normally 5/8 × 1¼ in (M16 × 32 mm), eight per splice. Post bolts pass through the rail, the blockout and the post, and run from 2 to 46 in (50 to 1,170 mm).

Specification. Geometry and thread to AASHTO M180. Material ASTM A307 Grade A, 60 ksi (414 MPa) minimum tensile. Thread 5/8-11 UNC-2A, or M16 × 2 to the metric edition. Hot-dip galvanized to ASTM A153 Class C or F2329, with the recessed nut tapped oversize so it still runs on the coated thread.

Supplied with matching recessed nuts and washers, plate washers manufactured at our Umm Al Quwain plant, and an EN 10204 3.1 certificate traceable to the heat.

Full dimensions, chemical and mechanical data and an animation of the bolt fitting the rail: see our guardrail bolt technical page.

Copper Bolt, Nut & Washer explained

Copper fasteners are made from electrolytic copper (C110 / Cu-ETP) or high-strength copper alloys such as silicon bronze and aluminium bronze. Pure copper has the highest conductivity and is used for earthing and busbar connections where galvanic corrosion with steel must be avoided; copper alloy bolts are stronger and used for marine and electrical hardware. All are non-magnetic and non-sparking.

Applications

• Earthing grids, earth bars and lightning protection
• Busbar and switchgear connections
• Battery banks, UPS and DC systems
• Transformer and generator terminals
• Marine and boat fittings (alloy grades)
• Chemical plant and non-sparking areas

Standards, grades & finishes

Bolts to DIN 933 / ISO 4017 dimensions in Cu-ETP (C11000), silicon bronze (C65100 / C65500) or aluminium bronze (C63000), nuts DIN 934, washers DIN 125A, threads ISO 965 6g. Plain or tin / nickel plated. Material certificates with chemical analysis. Also available: copper flat washers, spring washers and terminal studs.

This item is imported from approved mills and held in stock in our Umm Al Quwain warehouse alongside the anchor bolts, studs and plate washers we manufacture ourselves, so complete bolt sets ship from one source. Tensile, hardness and chemical testing is carried out by independent UAE-accredited laboratories, and EN 10204 3.1 certificates are issued with every batch. We supply across the GCC, MENA and Africa.

Through Bolt (Wedge Anchor) explained

A through bolt (wedge anchor, expansion bolt) is a threaded stud with a wedge clip or expansion sleeve at the embedded end. After drilling through the fixture into the concrete, the anchor is hammered in and the nut tightened, pulling the cone into the clip and locking it against the hole wall. Because the hole and bolt are the same diameter, alignment is automatic and the fixture is held tightly.

Applications

• Steel base plates and machine feet on concrete
• Racking, mezzanines and storage systems
• Cable trays, pipe supports and brackets
• Barriers, bollards and guard rails
• Curtain wall, canopy and signage fixings
• Seismic bracing and restraint (rated types)

Standards, grades & finishes

Anchors to manufacturer specification with ETA / CE approval available for cracked and non-cracked concrete, carbon steel class 5.8 / 8.8 zinc plated or hot-dip galvanized, stainless A4 (316) for external use. Sizes M6 to M24, lengths to suit fixture thickness. Load data per technical datasheet; setting torque and hole depth per size table.

This item is imported from approved mills and held in stock in our Umm Al Quwain warehouse alongside the anchor bolts, studs and plate washers we manufacture ourselves, so complete bolt sets ship from one source. Tensile, hardness and chemical testing is carried out by independent UAE-accredited laboratories, and EN 10204 3.1 certificates are issued with every batch. We supply across the GCC, MENA and Africa.

TCB Bolt (Tension Control Bolt) explained

A tension control bolt (TCB, twist-off bolt) has a round (button) head, a heavy hex nut and a splined tail on the thread end. The shear wrench holds the spline and turns the nut; when the bolt reaches the designed tension the spline shears off, leaving a clean end that proves the bolt was correctly tightened. TCBs eliminate torque calibration and turn-of-nut marking and need only one operator.

Applications

• High-rise steel frames and composite floors
• Bridges, viaducts and gantry structures
• Warehouses, PEB and long-span roofs
• Stadium, airport and station structures
• Wind tower and transmission structures
• Industrial plant and pipe rack connections

Standards, grades & finishes

Assemblies to ASTM F3125 Grade F2280 (150 ksi, formerly F2280) or Grade F1852 (120 ksi), JSS II-09 S10T, EN 14399-10 HRC 10.9, with nuts to ASTM A563 DH / EN 14399-10 and washers to F436 / EN 14399-6. Supplied as lubricated, matched assemblies with lot-specific tension test reports (pre-installation verification).

This item is imported from approved mills and held in stock in our Umm Al Quwain warehouse alongside the anchor bolts, studs and plate washers we manufacture ourselves, so complete bolt sets ship from one source. Tensile, hardness and chemical testing is carried out by independent UAE-accredited laboratories, and EN 10204 3.1 certificates are issued with every batch. We supply across the GCC, MENA and Africa.

T Bolt (T-Head Bolt) explained

A T bolt (T-head bolt, hammer head bolt) has a rectangular head that passes through a slot lengthways and locks across it when rotated 90°. Sizes for strut channel (e.g. 41 × 41) engage the channel lips; larger sizes to DIN 186 / DIN 261 fit machine tool T-slots. T bolts allow fixtures to be positioned anywhere along a slot and clamped without access behind.

Applications

• Strut channel and cable management
• Machine tool tables and T-slot fixtures
• Pipe clamps, hangers and supports
• Solar panel rails and mounting systems
• Formwork and scaffold couplers
• Conveyor guards and modular framing

Standards, grades & finishes

Bolts to DIN 186 / DIN 188 / DIN 261 (T-slot) or channel-system dimensions, property class 4.6 / 4.8 / 8.8 to ISO 898-1, stainless A2 / A4, threads ISO 965 6g. Nuts DIN 934 / flange nuts, washers DIN 125A. Finishes zinc plated to ISO 4042, hot-dip galvanized to ISO 1461, plain stainless.

This item is imported from approved mills and held in stock in our Umm Al Quwain warehouse alongside the anchor bolts, studs and plate washers we manufacture ourselves, so complete bolt sets ship from one source. Tensile, hardness and chemical testing is carried out by independent UAE-accredited laboratories, and EN 10204 3.1 certificates are issued with every batch. We supply across the GCC, MENA and Africa.

Stud Bolt — Metal End (Continuous & Tap End) explained

A metal end stud has a plain (unthreaded) centre section with threads at each end, used where the shank passes through a clearance hole and only the ends need engagement. It is stronger in fatigue than a fully threaded stud and locates better in the hole. We also produce fully threaded studs, tap-end studs and waisted or reduced-shank studs for high-fatigue applications.

Applications

• Flange and coupling connections
• Heavy machinery, mills and crushers
• Structural tie rods and hangers
• Bridge and civil anchorages
• Wind and solar structure fixings
• Custom studs for OEM equipment

Standards, grades & finishes

Manufactured to ISO, DIN, ANSI / ASME, BS, JIS and GB dimensions or to drawing, in carbon steel 4.6 / 8.8, alloy steel 10.9 / 12.9 / B7 / B16 and stainless A2 / A4 / B8 / B8M. Threads metric coarse, fine, UNC, UNF or 8UN. Finishes self colour, hot-dip galvanized, zinc plated, PTFE. Nuts and washers supplied to match.

Anchor bolts, studs and plate washers are manufactured in our own ISO 9001:2015 plant in Emirates Modern Industrial Area, Umm Al Quwain, with calibrated in-house dimensional and thread inspection. Tensile, hardness and chemical testing is carried out by independent UAE-accredited laboratories, and EN 10204 3.1 certificates are issued with every batch. We supply across the GCC, MENA and Africa.

Carriage Bolt explained

A carriage bolt (cup square hex bolt, coach bolt) has a smooth, low-domed head with a square section directly beneath it. Pulled into a timber member or a square punched hole, the square neck prevents the bolt turning, leaving a tamper-resistant smooth head on the outside. It is the standard bolt for timber construction, playground equipment, guard rails and any place where the head must be smooth and inaccessible.

Applications

• Timber decking, pergolas and fencing
• Playground and outdoor furniture
• Guard rails, barriers and signage
• Truck bodies, trailers and tailgates
• Cable ladder and strut channel
• Precast handling and formwork

Standards, grades & finishes

Bolts to DIN 603 / ISO 8677 (round head square neck), property class 4.6 and 8.8 to ISO 898-1, stainless A2 / A4 to ISO 3506, threads ISO 965 6g. Imperial to ASME B18.5. Nuts DIN 934, washers DIN 9021 large series. Finishes zinc plated to ISO 4042, hot-dip galvanized to ISO 1461.

This item is imported from approved mills and held in stock in our Umm Al Quwain warehouse alongside the anchor bolts, studs and plate washers we manufacture ourselves, so complete bolt sets ship from one source. Tensile, hardness and chemical testing is carried out by independent UAE-accredited laboratories, and EN 10204 3.1 certificates are issued with every batch. We supply across the GCC, MENA and Africa.

Stainless Steel Bolt explained

Stainless steel bolts resist corrosion because the chromium in the alloy forms a self-healing oxide film. A2 (304) is the general-purpose grade; A4 (316) adds molybdenum for resistance to chlorides, seawater and many chemicals. The number after the dash is the tensile strength (70 = 700 MPa, 80 = 800 MPa). Stainless bolts are non-magnetic (austenitic), hygienic and keep their appearance, but are prone to thread galling if tightened dry.

Applications

• Marine, jetty and coastal structures
• Desalination, water and wastewater plants
• Food, beverage and pharmaceutical equipment
• Architectural, façade and balustrade fixings
• Chemical and fertilizer plants
• Swimming pools, spas and hotel installations

Standards, grades & finishes

Bolts to DIN 931 / 933 / 912 / 7991 / ISO 4014 / 4017 / 4762, material to ISO 3506-1 A2-70, A2-80, A4-70, A4-80 (304, 316, 316L to ASTM A193 B8 / B8M where specified), threads ISO 965 6g or UNC. Nuts ISO 4032 / DIN 934 A2 / A4, washers DIN 125A / DIN 127. Plain or passivated; anti-galling lubricant on request.

This item is imported from approved mills and held in stock in our Umm Al Quwain warehouse alongside the anchor bolts, studs and plate washers we manufacture ourselves, so complete bolt sets ship from one source. Tensile, hardness and chemical testing is carried out by independent UAE-accredited laboratories, and EN 10204 3.1 certificates are issued with every batch. We supply across the GCC, MENA and Africa.

GI 4.6 Hex Bolt (Galvanized Mild Steel) explained

A GI hex bolt is a low-carbon (mild) steel bolt, property class 4.6 or 5.6, coated by hot-dip galvanizing to give a thick zinc layer that protects against rust for decades outdoors. Because the coating is thick the nut is tapped oversize to fit. GI bolts are used where corrosion resistance matters more than strength: fencing, towers, guard rails, cable trays and general steelwork.

Applications

• Fencing, gates and boundary walls
• Transmission, telecom and lighting towers
• Guard rails and highway furniture
• Cable trays, ladders and supports
• Roofing, cladding and purlin bolts
• Water tanks, pipelines and outdoor structures

Standards, grades & finishes

Bolts to DIN 931 / 933 / ISO 4014 / 4017 / BS 4190, property class 4.6 and 5.6 to ISO 898-1 (Grade A / 2 imperial), hot-dip galvanized to ISO 10684 / ASTM F2329 / BS 7371-6 with minimum 45 µm zinc. Nuts ISO 4032 class 5 tapped oversize; washers DIN 125A galvanized. Also available in 8.8 HDG.

This item is imported from approved mills and held in stock in our Umm Al Quwain warehouse alongside the anchor bolts, studs and plate washers we manufacture ourselves, so complete bolt sets ship from one source. Tensile, hardness and chemical testing is carried out by independent UAE-accredited laboratories, and EN 10204 3.1 certificates are issued with every batch. We supply across the GCC, MENA and Africa.