M3 x 3 mm Hex Socket Set (Grub) Screw, 304 Stainless Steel - SSSA2M3X3

The Metric Hex Socket Set (Grub) Screw, 304 Stainless Steel is available in 60 sizes (M3 to M12) and is a headless screw threaded full length with a hex key socket in one end. It is screwed into a collar, pulley or hub to lock it onto a shaft.

A2 stainless (grade 304) gives sound general corrosion resistance for inside work, fresh water and ordinary outdoor exposure. It is not the grade normally chosen for coastal, pool or marine work, where A4 (316) is recommended. Metric sizes are written M followed by the nominal thread diameter in millimetres, so M10 is a 10 mm thread.

You can choose from 60 variants, covering sizes M3 to M12 and lengths 3 mm to 50 mm. Every size comes in packs of 100.

Austenitic stainless steel is generally non-magnetic, although cold-worked parts can show weak magnetism. Use stainless washers and nuts with stainless fasteners, so the whole joint is made of the same material.

Where this product is used

• Food-service and light food-handling equipment
• Food, beverage and washdown equipment
• Adjusting stops and locating components in a bore
• Signs, furniture and fittings
• Locking pulleys, collars, cams and hubs to shafts
• Larger sizes for frames, plant and structural fixings

Features

• A2 (304) stainless steel for indoor, fresh water and general outdoor use
• Lengths from 3 mm to 50 mm
• Headless, so nothing protrudes once fitted
• Hex key drive
• Pack quantities to suit trade and bulk buying: packs of 100
• Metric thread sizes match the nuts, bolts and tapped holes in most Australian-supplied equipment

Key specifications

Selecting the right option

Stainless grub screws are softer than hardened alloy-steel ones, so check that the holding force is enough for the shaft load. Use a suitable thread-locking compound where vibration is present. The end shape of the screw is not stated in the supplier data. Near the coast, around pools or in marine settings, use the A4 (316) version instead: Metric Hex Socket Set (Grub) Screw - 316 Stainless Steel.

Related products

Also available: Hex Socket Set Screw A2 (304).