Flat washers for SHCS's
Flat washers for SHCS's
(OP)
I have recently ran into an issue finding proper through-hardened flat washers for use with socket head cap screws.
It seems that every flat washer specification I find gives a possible interference between the ID of the washer and the underhead fillet of the SHCS.
The socket head cap screws have material hardness specified by ASTM A574. Their dimensions are defined by ASME B18.3.
Is there a good solution out there??
It seems that every flat washer specification I find gives a possible interference between the ID of the washer and the underhead fillet of the SHCS.
The socket head cap screws have material hardness specified by ASTM A574. Their dimensions are defined by ASME B18.3.
Is there a good solution out there??





RE: Flat washers for SHCS's
RE: Flat washers for SHCS's
RE: Flat washers for SHCS's
RE: Flat washers for SHCS's
What I can tell you is that using ISO standards eliminates this problem. Specifying a socket head cap screw (M6) according to ISO 4762 shows that the maximum diameter associated with the fillet (called da) is 6.8 mm. The inner diameter of the corresponding washer (ISO 887) is 6.4 mm with a tolerance of - 0/+ 0.18 according to ISO 4759-3.
RE: Flat washers for SHCS's
Not very satisfying is it?
Apparently the washer committee and the bolt and screw committee don't talk to each other.
RE: Flat washers for SHCS's
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?