Shoulder bolts have a precision-ground plain shoulder and a smaller threaded end, so they act as an axle, pivot or guide pin as well as a fastener. We stock ISO 7379 / DIN 9841 in Umm Al Quwain in 12.9 alloy steel and stainless, shoulder diameters 6 to 25 mm, with matching washers and nuts.
A socket head shoulder bolt (shoulder screw, stripper bolt) has three sections: a socket head, a ground shoulder of close tolerance (h8) and a threaded end one size smaller than the shoulder. The shoulder provides a bearing surface for a rotating or sliding part — a roller, lever, pulley or die stripper plate — while the thread clamps the bolt to the base. Length is specified by the shoulder length, not overall length.
Applications
- Press tool stripper plates and die sets
- Pulleys, rollers and cam followers
- Pivots and linkages in machinery
- Conveyor guide rollers and gates
- Robotics and automation fixtures
- Motorcycle, bicycle and vehicle components
Standards, grades & finishes
Bolts to ISO 7379 / DIN 9841, alloy steel property class 12.9 (shoulder hardness 32–43 HRC), stainless A2 / A4 (ISO 7379 group), shoulder tolerance h8, thread ISO 965 6g. Finishes black oxide or plain stainless. Imperial ASME B18.3 shoulder screws from stock.
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.