• Dimensions are in inches.
  • Formerly designated Medium Helical Spring Lock Washers.
Standard Stock Material
  • Carbon Steel
  • Stainless Steel
  • Phosphorus Bronze
Unit of Measure

Manufacturer

Manufacturer

N/A Industrial Fasteners Institute

Specifications

Product

N/A Washers

Unit of Measure

N/A English

Nominal Washer Size

N/A 2-1/2 in

Nominal Washer Size (Decimal)

N/A 2.5000 in

Max. Inside Diameter (A)

N/A 2.543 in

Min. Inside Diameter (A)

N/A 2.512 in

Max. Outside Diameter (B)

N/A 3.471 in

Min. Mean Section Thickness (ti + to)/2

N/A 0.440 in

Min. Section Width (W)

N/A 0.442 in

Min. Bearing Width (BW)

N/A 0.309 in

Material

N/A Carbon Steel Phosphorus Bronze Stainless Steel

Codes and Standards

Codes and Standards

N/A ASME B18.21.1 1999
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