lw29-1

  • Provide exceptional holding strength and withstand high torques – ideal for heavy duty applications.
  • Ribbed for rigidity under load.
  • Sharp points on periphery resist shifting
  • Internal teeth lock into bolt head or nut to prevent backoff.
  • Ideal where thick materials and high torques are involved.
Nominal
Washer Size
Hole Diameter
Min.
Hole Diameter
Max.
Across Flats
Min.
Across Flats
Max.
Across
Corners
Minimum HeightThicknessWT./MWCL Part
Number
Cross
Reference
1/40.2520.2580.740.760.8660.180.0788.55PYRM-0250-14-014914-14-01
5/160.320.3320.740.760.8660.1450.0620.701PYRM-0312-14-014918-14-01
5/160.320.3320.991.011.150.2000.07813.53PYRM-0312-18-014918-18-01
3/80.3840.3980.991.011.150.130.06212.1PYRM-0375-18-014920-18-01
3/80.3840.3981.241.261.410.270.10936.18PYRM-0375-23-014920-23-01
7/160.4540.4681.241.261.410.270.10934PYRM-0437-23-014922-23-01
7/160.4460.451.3551.3751.5760.1950.09335.71PYRM-0437-25-014922-25-01
1/20.5120.5291.241.261.410.1950.10931.95PYRM-0500-23-014924-23-01
1/20.5120.5291.3551.3751.5760.210.09332.26PYRM-0500-25-014924-25-01
1/20.5120.5291.3551.3751.5760.190.09333.06PYRM-0500-25-024924-25-02