1.1 This specification covers the requirements for stainless steel nuts 0.25 to 1.50 in. in nominal diameter inclusive in a number of alloys in common use and intended for service applications requiring general corrosion resistance.

1.2 Seven groups of stainless steel alloys are covered, including ten austenitic, two ferritic, four martensitic, and one precipitation hardening.

Group	AlloysA	ConditionB
1	304, 305, 304L, 384, 18-9LW, 302HQ	(CW)	cold workedD
2	316, 316L	(CW)	cold worked
3	321, 347	(CW)	cold worked
4	430	(CW)	cold worked
5	410	(H)	hardened and tempered
6	431	(H)	hardened and tempered
7	630	(AH)	aged hardened

^AUnless otherwise specified on the inquiry and order, the choice of an alloy from within a group shall be at the discretion of the fastener manufacturer (see 6.1 ).
^BSee 4.2 for options.
^CWhen approved by the purchaser, alloys 303, 303Se, or XM1 may be furnished.
^DSizes 0.75 in. and larger may be hot worked and solution annealed.
^EWhen approved by the purchaser, alloy 430F may be furnished.
^FWhen approved by the purchaser, alloy 416 or 416Se may be furnished.

1.3 Supplementary requirements of an optional nature are provided, applicable only when agreed upon by the manufacturer and the purchaser at the time of the inquiry and order.

1.4 Suitable bolts, hex cap screws, and studs for use with nuts included in this specification are covered by Specification F 593. Unless otherwise specified, all bolts, hex cap screws, and studs used with these nuts shall conform to the requirements of Specification F 593 and shall be of the same alloy group.