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.

ASTM A193 B8 / B8M Stud Bolts with A194 8 / 8M Nuts explained

ASTM A193 B8 is austenitic stainless steel type 304 and B8M is type 316, the molybdenum-bearing grade with better resistance to chlorides and pitting. Class 1 studs are solution annealed for maximum corrosion resistance and high-temperature service; Class 2 are strain hardened for higher strength (up to 125 ksi tensile in small sizes). Stainless studs are used where carbon-steel B7 would corrode or contaminate the process.

Applications

• Seawater, desalination and marine piping
• Food, pharmaceutical and dairy process lines
• Chemical and chlorine service flanges
• Cryogenic and LNG connections
• Stainless steel pipework in water treatment
• Architectural and exposed structural fixings

Standards, grades & finishes

Studs to ASTM A193 / A193M Grade B8 or B8M, Class 1 or Class 2, threads UNC / 8UN Class 2A or metric 6g. Nuts to ASTM A194 Grade 8 / 8M with anti-galling lubricant applied on request. Washers in matching stainless. PMI (positive material identification) test available for every lot.

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.

Anchor Bolt (Foundation Bolt Set) explained

An anchor bolt (foundation bolt, holding-down bolt) transfers load from a steel structure or machine into its concrete foundation. Cast-in anchor bolts are set before the pour using a template; post-installed anchors are fixed later. We manufacture the cast-in type in every common configuration — straight rod with anchor plate, L-hook, J-hook, square-head and double-end — and supply them tagged per column so site installation is straightforward.

Applications

• Steel-framed buildings, PEB and warehouses
• Industrial equipment, pumps, compressors and generators
• Tanks, silos and vessel skirts
• Bridges, pipe racks and pedestals
• Poles, masts and towers
• Precast and modular structures

Standards, grades & finishes

Manufactured to ASTM F1554 Grade 36 / 55 / 105, ISO 898-1 class 4.6 / 8.8, BS 7419 (square-head holding-down bolts) or to your drawing. Materials S275JR, S355JR, EN8, EN19 and 42CrMo4 with mill certificates. Threads metric coarse or UNC. Finish self colour, hot-dip galvanized to ISO 1461 / ASTM F2329 or zinc plated. Test certificates to EN 10204 3.1 with every batch.

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.

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.

Dowel Bar explained

A dowel bar is a smooth, straight steel bar placed across a contraction or construction joint in a concrete pavement or slab. It transfers wheel load from one slab to the next while allowing the joint to open and close with temperature, because one half is debonded and slides in the concrete. Correct alignment is critical, which is why dowels are usually supplied pre-assembled in dowel baskets.

Applications

• Rigid concrete pavements — highways, airports and ports
• Industrial floor slabs and warehouse floors
• Container yards and heavy-duty hardstands
• Bridge approach slabs
• Precast slab connections
• Car parks and access roads

Standards, grades & finishes

Bar to ASTM A615 Grade 40 / 60 or BS 4482 / EN 10025 S275, plain round, cut square and chamfered to avoid spalling. Debonding by grease, bituminous coating or plastic sleeve per the pavement specification. Epoxy coating to ASTM A775 or hot-dip galvanizing to ISO 1461 on request. Supplied loose, bundled by size or assembled into welded dowel baskets.

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.

Swage Stud (Cable Terminal) explained

A swage stud is a cylindrical fitting with a bore for the wire rope at one end and a threaded stud at the other. The bore is cold-swaged (compressed) onto the rope with a hydraulic swaging tool, giving a terminal with 90–100% of the rope breaking strength. Threaded swage studs connect to turnbuckle bodies, tensioners and brackets and are the standard terminal for architectural cable balustrades, guy wires, mast rigging and cable-net façades.

Applications

• Stainless cable balustrades and handrails
• Guy wires for masts, towers and tents
• Cable-net façades and green walls
• Yacht rigging and marine lifelines
• Structural tie-rod and cable bracing
• Shade sails and tensile membranes

Standards, grades & finishes

Studs in stainless 316 (A4) for 3 to 26 mm 1×19 / 7×7 / 7×19 wire rope, threads M6 to M36 RH and LH to ISO 965, also in galvanized carbon steel for structural guy wires. Swage efficiency 90–100% of rope MBL when swaged per manufacturer die chart. Supplied with swage forks, eyes, toggles and turnbuckles; swaging service and hydraulic tool hire available.

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.

ASTM A193 B7 Threaded Rod explained

ASTM A193 B7 threaded rod is quenched-and-tempered chromium-molybdenum alloy steel (AISI 4140) with a minimum tensile strength of 125 ksi, threaded along its full length. It is produced to ASME B18.31.3 with coarse (UNC), 8-pitch (8UN) or metric threads and is the base material for stud bolts in high-temperature, high-pressure piping.

Applications

• Stud bolt production for ASME flanges
• Anchor rods for equipment and vessel skirts
• Tie rods on expansion joints and spring hangers
• Heat exchanger and boiler bolting
• High-strength hangers and brackets
• Site-cut studs for turnaround and maintenance

Standards, grades & finishes

Rod conforms to ASTM A193 / A193M Grade B7 (B7M and B16 on request), dimensions to ASME B18.31.3 / B18.31.4M, threads UNC / 8UN Class 2A to ASME B1.1 or metric 6g. Supplied plain (oiled), hot-dip galvanized, zinc plated or PTFE / Xylan coated. A194 2H nuts and F436 washers supplied to match. Mill test certificate with chemical and mechanical results per heat.

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.

Dowel Basket explained

A dowel basket (dowel bar assembly) is a factory-made cage that positions dowel bars across a pavement joint. Because the bars are welded parallel to each other and to the road surface, the joint can open freely and load transfer is consistent along its whole length. Baskets are pinned to the sub-base, the joint is sawn over the centre of the dowels after the pour, and the shipping wires are cut before concreting.

Applications

• Jointed plain concrete pavements (JPCP) on highways
• Airport runways, taxiways and aprons
• Port container terminals and RTG lanes
• Industrial floor construction and expansion joints
• Bus lanes, toll plazas and truck stops
• Precast slab and approach slab joints

Standards, grades & finishes

Cradle wire 5–8 mm to BS 4482 / ASTM A82, spot or MIG welded, with dowels debonded on one side. Assemblies conform to project specification, AASHTO / FHWA guidance or BS EN 13877 as required. Standard basket length 3.0 – 3.6 m in steps to suit lane width. Epoxy-coated or galvanized dowels available. Supplied with placing instructions.

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.

ASTM A194 Grade 2H Heavy Hex Nut explained

ASTM A194 Grade 2H is a heavy hex nut of quenched-and-tempered medium-carbon steel with a minimum proof load of 175 ksi, sized to ASME B18.2.2 with a larger across-flats and thickness than a standard nut. It is the standard nut for high-pressure and high-temperature flange bolting with A193 B7, B16 and A320 L7 studs, and for A325 / A490 structural bolts where DH nuts are not specified. Grade 2HM is the controlled-hardness version for NACE MR0175 sour service.

Applications

• ASME B16.5 / B16.47 flange joints with B7 studs
• Pressure vessels, exchangers and boilers
• Valve bonnets and pump casings
• Structural bolting with A325 / A490
• Refinery, gas plant and pipeline connections
• Anchor bolts in equipment foundations

Standards, grades & finishes

Nuts to ASTM A194 / A194M Grade 2H (2HM on request), dimensions to ASME B18.2.2 heavy hex, threads UNC / 8UN Class 2B to ASME B1.1 or metric 6H to ISO 965; galvanized nuts tapped oversize to ASTM A563 / F2329 with dry lubricant. Finishes plain, hot-dip galvanized, zinc plated, PTFE / Xylan. Hardness and proof load certified per heat.

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.