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Lock Washer Helical: Extra Duty

MS35340-25 cres420 to MS35340-37 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 3 of 6
seriesrecord idfinishid min in (in)materialms part numbernominal bolt designationnominal bolt size in (in)od max in (in)standardthickness in (in)
Extra DutyMS35340-25 cres420Passivate0.255CRES 420MS35340-251/40.250.535MIL-STD-1764 Section 5060.084
Extra DutyMS35340-2 carbon steelCadmium plate0.092Carbon SteelMS35340-2#20.0860.196MIL-STD-1764 Section 5060.025
Extra DutyMS35340-2 cres302Passivate0.092CRES 302MS35340-2#20.0860.196MIL-STD-1764 Section 5060.025
Extra DutyMS35340-31 carbon steelCadmium plate0.318Carbon SteelMS35340-315/160.31250.65MIL-STD-1764 Section 5060.094
Extra DutyMS35340-31 cres302Passivate0.318CRES 302MS35340-315/160.31250.65MIL-STD-1764 Section 5060.094
Extra DutyMS35340-31 cres316Passivate0.318CRES 316MS35340-315/160.31250.65MIL-STD-1764 Section 5060.094
Extra DutyMS35340-31 cres420Passivate0.318CRES 420MS35340-315/160.31250.65MIL-STD-1764 Section 5060.094
Extra DutyMS35340-37 carbon steelCadmium plate0.382Carbon SteelMS35340-373/80.3750.74MIL-STD-1764 Section 5060.109
Extra DutyMS35340-37 cres302Passivate0.382CRES 302MS35340-373/80.3750.74MIL-STD-1764 Section 5060.109
Extra DutyMS35340-37 cres316Passivate0.382CRES 316MS35340-373/80.3750.74MIL-STD-1764 Section 5060.109

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