M2 Spring Washer, 316 Stainless Steel - SWAA4M2

The Metric Spring Washer, 316 Stainless Steel is a split ring washer, twisted so that its ends spring apart. It sits under a nut or bolt head and helps resist loosening from vibration.

Made from 316 (A4) stainless steel, the grade normally specified for chloride-exposed work such as coastal installations, swimming pools, marine fittings and food-processing plant. Metric sizes are written M followed by the nominal thread diameter in millimetres, so M10 is a 10 mm thread.

You can choose from 19 variants, covering sizes M2 to M36. Variants are supplied in packs of 25 to 200, depending on size.

Austenitic stainless steel is generally non-magnetic, although cold-worked parts can show weak magnetism. In wet conditions, keep stainless steel apart from aluminium and galvanised steel with a washer or sleeve, to reduce the risk of galvanic corrosion.

Where this product is used

• Machinery, frames and covers
• Marine, coastal and washdown fittings
• General maintenance fastening
• Bulk jobs and trade or maintenance stores buying in larger packs
• Boat, jetty and waterfront structures
• Small sizes for enclosures, instruments and light fittings

Features

• A4 (316) stainless steel with molybdenum, for coastal and chloride-exposed settings
• Metric thread sizes match the nuts, bolts and tapped holes in most Australian-supplied equipment
• Pack quantities to suit trade and bulk buying: packs of 25 to 200
• Resists loosening from vibration
• Range covers M2 to M36 in 19 variants
• Split ring spring action keeps pressure on the fastener

Key specifications

Selecting the right option

A spring washer provides limited locking on its own. Where the joint is critical or loaded in shear, use a locking nut or a thread-locking method as well. Match the washer to the fastener size. For indoor and general outdoor use where chlorides are not a concern, the A2 (304) version is the lower-cost option: Metric Spring Washer - 304 Stainless Steel.

Related products

Also available: Imperial Spring Washer - 304 Stainless Steel and Imperial Spring Washer - 316 Stainless Steel - A0212243. Matching products: Metric Hex Bolt - 316 Stainless Steel, Metric Standard Hex Nut - 316 Stainless Steel and Flat Round Washer DIN125A Stainless Steel.