SS 304 A2 Plain Flat Washer

The SS 304 A2 plain flat washer is a widely used fastener component. "SS 304" refers to the stainless - steel material type. It is made of 304 - grade stainless steel, which offers excellent corrosion resistance, good mechanical properties, and is suitable for a variety of applications in different environments. The "A2" designation is often used in the context of stainless - steel fasteners and typically indicates a certain composition and quality level within the 304 - type stainless steel, meeting specific European standards for corrosion resistance and material characteristics.

A 304 Stainless Steel A2 Plain Flat Washer is a common fastener accessory with the following characteristics:

Material:

SS 304 (A2) – Made from AISI 304 stainless steel, which is part of the A2 stainless steel group (as per ISO 3506 standard).

Corrosion-resistant: Good for general use, resists rust in mild environments.

Non-magnetic (may become slightly magnetic after cold working).

Composition: ~18% Chromium, ~8% Nickel.

Type:

Plain Flat Washer – A simple, flat disc with a central hole, used to distribute load, prevent damage to surfaces, or act as a spacer.

Standards & Grades:

A2 – Denotes Austenitic stainless steel grade 304 under ISO standards.

Equivalent to ASTM F593 (for stainless steel washers).

Common Sizes:

Available in various inner diameters (ID), outer diameters (OD), and thicknesses.

Example sizes: M3, M4, M5, M6, etc. (metric) or #4, #6, #8, etc. (imperial).

Applications:

Used in marine, food processing, chemical, and general industrial applications where corrosion resistance is needed.

Often paired with A2 or A4 (316) stainless steel bolts.

Key Features:

Durable & corrosion-resistant (but not as resistant as A4/316 in harsh environments).

Smooth finish (typically plain, but can be polished if needed).

Non-hardened (not suitable for high-strength applications).