Grub screws lock pulleys, collars and couplings onto shafts, and we stock the full DIN socket set screw range in Umm Al Quwain from M2 to M30 — cup, flat, cone, dog and knurled cup points — in 45H alloy steel (black) and stainless A2 / A4, with hex and Torx drives.
A grub screw (socket set screw) is a headless screw with a hex socket at one end and a shaped point at the other. Tightened through a threaded hole in a hub, the point bears on the shaft and stops the hub rotating or sliding. Cup point (DIN 916) bites into the shaft for the strongest grip; flat point (DIN 913) for minimal marking and frequent adjustment; cone point (DIN 914) locates in a drilled dimple; dog point (DIN 915) enters a slot or hole for positive drive.
Applications
- Pulleys, sprockets and couplings on shafts
- Bearing collars and locking rings
- Handles, knobs and hand-wheels
- Gearbox and motor adaptors
- Conveyor rollers and drive shafts
- Door handles, locks and hardware
Standards, grades & finishes
Screws to DIN 916 / ISO 4029 (cup), DIN 913 / ISO 4026 (flat), DIN 914 / ISO 4027 (cone), DIN 915 / ISO 4028 (dog), knurled cup, material alloy steel 45H (ISO 898-5) black oxide, stainless A2 / A4 to ISO 3506-3, brass. Threads ISO 965 6g coarse; fine thread and imperial ASME B18.3 to order. Torx (ISO 10664) drive 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.