ASTM and Stainless Steel Washers

ASTM and Stainless Steel Washers

by Steven Wallenstein 6 Comment

Stainless steel washers are not made to an ASTM specification; they are only made to raw material specifications. Most stainless steel ASTM bolt specifications refer to the raw material specification they are made from as the appropriate washer to use in conjunction with the bolt. Hence, an ASTM A193 or A320 grade B8M bolt, made from type 316 stainless steel, requires a type 316 stainless steel washer. An ASTM A193 or A320 grade B8 bolt, made from type 304 stainless steel, requires a type 304 stainless steel washer. These standard washers are typically made to the dimensional tolerances of ASME B18.21.1.

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6 comments

Lakhan Chaudhari

I need to specify ASTM or any international standard for 18-8 stainless steel. Please suggest.

Reply
    Dane McKinnon

    @Lakhan- There are two common ASTM standards for stainless steel fasteners, ASTM A193 and F593. You can find summaries of both standards on our website to help in making a choice.

    Reply
dileep

sir, what is the astm standerd of ss 316g bolt & which is the correct ss grade match with astm a276

Reply
    Dane McKinnon

    @Dileep- ASTM F593 has a marking of F593G for 316 stainless bolts in condition CW from 1/4″ to 5/8″ diameter. ASTM A276 is a generic raw material standard and would not exactly cross over to F593G due to the work hardening that occurs during the bolt manufacturing process.

    Reply
Gil Jones

I need to specify ASTM F593 screws and F594 Nuts, What would the ASTM spec be for Flat & LOck washers.

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