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GMW3362 7th Edition, May 1, 2017 M Point for External Metric Thread, Coarse Pitch Fasteners
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Description / Abstract: Introduction
Note: Nothing in this standard supercedes applicable laws and regulations.
Note: In the event of conflict between the English and domestic language, the English language shall take precedence.
Purpose. This standard specifies the characteristics of M Points for external metric threaded fasteners with coarse pitch; M5, M6, M8, M10, M12, M14 and M16.
Designation
Type A: Bolts, screws, studs and double end studs with a standard end point, see Figure 1 and Table 1.
Type B: Bolts, screws and double end studs with an external hex driver end point, see Figure 2 and Table 2.
Type C: Bolts, screws and double end studs with an external six-lobe driver end point, see Figure 3 and Table 3.
Note: When not explicitly specified, the default shall be Type A.
Applicability. This specification applies to the design of an anti-cross threading feature for externally threaded fasteners.
Note: Only the latest approved standards are applicable unless otherwise specified.
Remarks. Calculation method for nominal length (Lnom) revised May 2017. Designs and drawings released prior to May 2017 are exempt to the calculation methodology for Lnom. Designs and drawings released after May 2017 will utilize the new calculation methodology. The calculation discrepancy was identified with Lnom equal to 50 mm.
Note: Nothing in this standard supercedes applicable laws and regulations.
Note: In the event of conflict between the English and domestic language, the English language shall take precedence.
Purpose. This standard specifies the characteristics of M Points for external metric threaded fasteners with coarse pitch; M5, M6, M8, M10, M12, M14 and M16.
Designation
Type A: Bolts, screws, studs and double end studs with a standard end point, see Figure 1 and Table 1.
Type B: Bolts, screws and double end studs with an external hex driver end point, see Figure 2 and Table 2.
Type C: Bolts, screws and double end studs with an external six-lobe driver end point, see Figure 3 and Table 3.
Note: When not explicitly specified, the default shall be Type A.
Applicability. This specification applies to the design of an anti-cross threading feature for externally threaded fasteners.
Note: Only the latest approved standards are applicable unless otherwise specified.
Remarks. Calculation method for nominal length (Lnom) revised May 2017. Designs and drawings released prior to May 2017 are exempt to the calculation methodology for Lnom. Designs and drawings released after May 2017 will utilize the new calculation methodology. The calculation discrepancy was identified with Lnom equal to 50 mm.