5/16" Spring Washer, 316 Stainless Steel - SWAA4516

The Imperial Spring Washer, 316 Stainless Steel, A0212243 is available in 13 sizes (1/8" to 1-1/8") and 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.

The range runs to 13 variants, covering sizes 1/8" to 1-1/8". Pack quantities depend on size: packs of 25 to 200.

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

• Under nuts and bolt heads on vibrating equipment
• Marine, coastal and washdown fittings
• Machinery, frames and covers
• Bulk jobs and trade or maintenance stores buying in larger packs
• Outdoor fittings exposed to salt air
• Larger sizes for frames, plant and structural fixings

Features

• Resists loosening from vibration
• A4 (316) stainless steel with molybdenum, for coastal and chloride-exposed settings
• Split ring spring action keeps pressure on the fastener
• Supplied in packs of 25 to 200
• Choice of 13 sizes, 1/8" to 1-1/8"

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: Imperial Spring Washer - 304 Stainless Steel.

Related products

Also available: Imperial Spring Washer - 316 Stainless Steel - A0212244 and Metric Spring Washer - 304 Stainless Steel. Often used with: Imperial Flat Round Washer (Standard) - 316 Stainless Steel.