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Lock Washer Helical: Extra Duty

MS35340-12 carbon steel to MS35340-25 cres316

Helical spring lock washer dimensions per MIL-STD-1764 Section 506 — ID (min), OD (max), and section thickness for Regular (MS35338), Extra Duty (MS35340), and Hi-Collar (MS51848) series across bolt sizes #2 through 1-1/2 inch, in carbon steel (cadmium plate) and corrosion-resistant steel (CRES 302, 316, 420); supports bolt joint design, counterbore/clearance sizing, and military/aerospace fastener part selection

Mechanical Engineeringseries: Extra Duty10 rowsPage 2 of 6
seriesrecord idfinishid min in (in)materialms part numbernominal bolt designationnominal bolt size in (in)od max in (in)standardthickness in (in)
Extra DutyMS35340-12 carbon steelCadmium plate0.221Carbon SteelMS35340-12#120.2160.415MIL-STD-1764 Section 5060.062
Extra DutyMS35340-12 cres302Passivate0.221CRES 302MS35340-12#120.2160.415MIL-STD-1764 Section 5060.062
Extra DutyMS35340-12 cres316Passivate0.221CRES 316MS35340-12#120.2160.415MIL-STD-1764 Section 5060.062
Extra DutyMS35340-137 carbon steelCadmium plate1.398Carbon SteelMS35340-1371-3/81.3752.239MIL-STD-1764 Section 5060.344
Extra DutyMS35340-137 cres302Passivate1.398CRES 302MS35340-1371-3/81.3752.239MIL-STD-1764 Section 5060.344
Extra DutyMS35340-150 carbon steelCadmium plate1.525Carbon SteelMS35340-1501-1/21.52.43MIL-STD-1764 Section 5060.375
Extra DutyMS35340-150 cres302Passivate1.525CRES 302MS35340-1501-1/21.52.43MIL-STD-1764 Section 5060.375
Extra DutyMS35340-25 carbon steelCadmium plate0.255Carbon SteelMS35340-251/40.250.535MIL-STD-1764 Section 5060.084
Extra DutyMS35340-25 cres302Passivate0.255CRES 302MS35340-251/40.250.535MIL-STD-1764 Section 5060.084
Extra DutyMS35340-25 cres316Passivate0.255CRES 316MS35340-251/40.250.535MIL-STD-1764 Section 5060.084

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