SAE J995 Specification

This SAE Standard covers the mechanical and material requirements for three grades of steel nuts suitable for use in automotive and related engineering applications, in sizes 1/4 to 1-1/2 in, inclusive, and with dimensions conforming with the requirements of the latest issue of ASME B18.2.2 or ASME B18.6.3, as applicable.

SAE J995 Chemical Composition

NOTES :
1. All values are for ladle analysis (percent by weight) and are subject to standard varia- tions for check analysis as given in SAE J409.
2. Resulfurized and rephosphorized material is not subject to rejection based on check analysis for sulfur.
3. If agreed between purchaser and producer, sulfur content may be 0.23 max.
4. Phosphorus content may be 0.13 max for acid bessemer steel only.
5. If agreed between purchaser and producer, sulfur content may be 0.35 max and phos- phorus content may be 0.12 max provided that manganese content is 0.70 min.
6. If agreed between purchaser and producer, sulfur content may be 0.33 max provided that manganese content is 1.35 min.

SAE J995 Mechanical Requirements

SAE J995 PROOF LOAD REQUIREMENTS FOR NUTS

Note:

1.The proof load in pounds for a nut is computed by multiplying the proof load stress, in psi (Ibf/ink ), for the nut grade, size, thread series, and type, as shown in Table 2, and the stress area, in sq in (in'), for the applicable size and thread series shown in Table 3. (See Appendix A, Table A1 for computed values for some products.)
2.Grade 2 is normally applicable to square nuts only, and square nuts are normally available in Grade 2 only.
3.Proof load stress values for hex jam, heavy hex jam, hex slotted, heavy hex, hex thick, heavy hex slotted, and hex thick slotted nuts are based on requirements for hex nuts. Primarily, each value is derived from the ratio of minimum thickness of the product involved to the minimum thickness of hex or square machine screw nuts and hex nuts (see ASME B18.2.2 and ASME B18.6.3) of the same size—and adjusted to compensate for differences in width across flats, width and depth of slots, and depth of countersink.

SAE J995 Tensile Strength for Bolts, Screws and Studs

Reference Documents

·         SAE J403

·         SAE J404

·         SAE J1268

·         ASTM F2328

·         ASTM F606

·         ASTM F1470

·         ASME B18.18.2