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ASME B18.21.1 2009 Edition, January 1, 2009
Complete Document
Active, Most Current
Washers: Helical Spring-Lock, Tooth Lock, and Plain Washers (Inch Series)
Includes all amendments and changes through Reaffirmation Notice , 2009
Page Count:34
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This Standard covers the dimensional requirements, physical properties, and related test methods for helical spring-lock washers (# 0 through 3 in.), tooth-lock washers (# 2 through 134 in.), and plain washers (# 0 through 3 in.).

The inclusion of dimensional data in this Standard is not intended to imply that all products described are stock production items. Consumers should consult with suppliers concerning the availability of products.

NOTE: The word lock appearing in the names of products in this Standard is a generic term historically associated with their identification and is not intended to imply an indefinite permanency of fixity in attachments where the fasteners are used.