1-1/2" x 3-1/4" x 10G Flat Round Washer, 316 Stainless Steel - FRWA4112X314

The Imperial Flat Round Washer (Standard), 316 Stainless Steel is available in 44 sizes (1/8" x 5/16" x 22G to 1" x 2-1/2" x 10G) and is a flat ring that spreads the clamping load of a nut or bolt head and protects the surface being fixed.

You can choose from 44 variants, covering sizes 1/8" x 5/16" x 22G to 1" x 2-1/2" x 10G. Variants are supplied in packs of 25 to 200, depending on size.

A4 (316) stainless steel contains molybdenum (about 2 to 3 per cent), which improves its resistance to chlorides. It is the grade normally chosen for coastal, pool, marine and food-processing settings, and it costs more than A2 (304).

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

• Larger sizes for frames, plant and structural fixings
• Bulk jobs and trade or maintenance stores buying in larger packs
• Bridging oversize or slotted holes
• Under nuts and bolt heads to spread the load
• Protecting soft or painted surfaces
• Small sizes for enclosures, instruments and light fittings

Features

• A4 (316) stainless steel with molybdenum, for coastal and chloride-exposed settings
• Supplied in packs of 25 to 200
• Range covers 1/8" x 5/16" x 22G to 1" x 2-1/2" x 10G in 44 variants
• Spreads clamping load under bolts and nuts
• Protects the surface from damage

Key specifications

Selecting the right option

Match the washer to the fastener size, and check outer diameter and thickness for the load. Washers are listed by the size of bolt they suit. Use stainless washers with stainless bolts to avoid mixed-metal corrosion. For indoor and general outdoor use where chlorides are not a concern, the A2 (304) version is the lower-cost option: Imperial Flat Round Washer (Standard) - 304 Stainless Steel.

Related products

Other versions in this range: Inox Standard Flat Round Washer - 304 Stainless Steel and Metric Flat Round Washer - 304 Stainless Steel. Often used with: Imperial Spring Washer - 316 Stainless Steel - A0212243.