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1. For titles
and source of availability of referenced ASTM and SAE
specifications, refer to page N-38. For ASTM A563, seepage
B-167. For ASTM Al94/A194M, seepage B-126.
2. A563 Grades C and C3 nuts are intended for use with
A325 high strength structural bolts. These grades are
available only in the heavy hex style.
3. Dimensions for all styles of nuts are covered in
ASME/ANSI B 18.2.2, page D-2.
4. To compute the proof load, in pounds, for a nut,
multiply the proof load stress value, ksi, as given
in the table for the applicable strength grade, style,
size and surface condition by 1000 and multiply this
answer by the tensile stress area of the nut's screw
thread as given in Tables 1, 2 and 3 of ASME 61.1, pages
A-36 thru A-38.
5. Zinc coated nuts are nuts intended for use with externally
threaded fasteners which are hot-dip; galvanized, mechanically
galvanized, or have a plating or coating of sufficient
thickness to necessitate that the nut
thread be overlapped to provide assemblability.
6. Proof loads of slotted and jam nuts may be assumed
to be 80 percent and 60 percent, respec
tively, of the proof loads of full thickness nuts of
the same grade, size and basic dimensional style.
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