If a purchaser specifies an ASTM F844 washer with the dimensions of Portland Bolt’s plate washers, then the washers do meet the requirements of F844.
According to ASTM F844, a specification for general use steel washers, the washer dimensions must conform to ASME B18.21.1, Type A, Tables 1A and Tables 1B, unless otherwise specified. The F844 specification goes on to state in “Ordering Information” that dimensions other than B18.21.1, Type A must be called out when the order is placed. Furthermore, the specification states there are no chemical composition or mechanical property requirements, unless otherwise specified.
Taking into consideration the information in the ASTM F844 washer specification, we can declare that the only requirements for F844 washers are the washers are made from steel and the washers conform to dimensional requirements, unless otherwise specified by the purchaser. If a purchaser specifies dimensions that align with Portland Bolt’s round plate washers then the round plate washers can be certified to ASTM F844.
Love your company!!!!
Putting together a hardware – standards training package for our Pre-apprenticeship Trades class.
Question 1. Are ASTM A563 Grade A nuts and ASME B18.21.1 washers compatible (as in equal to or stronger than) with A307 threaded rod?
Question 2. Do you have any company branded charts- posters- diagrams- training aids that I could put up in our classroom?
See: https://amsc.edmonds.edu/programs/pre-apprenticeship/construction-trades/default.html
@Ron- Thanks!
Answer 1. A563A is an ASTM nut standard that is compatible with A307 bolts and studs. ASME B18.21.1 is a dimensional-only specification with several allowable sizes that does not call out any mechanical or chemical properties. The washer recommended by A307 is an F844 washer which does meet the dimensional requirements of ASME B18.21.1 but also has some additional language besides just dimensions.
Answer 2. You are welcome to use anything you find on our website, but we do not have any printed posters or training aids. Apologies.