External Type
Recommended to provide maximum tortorsional resistance.lw31-1
Internal Type
Recommended where appearance or possible snagging are important considerations.lw31-2
  • Use with large diameter screw and bolt heads when extreme torques are not required.
  • Spans oversized and elongated holes.

External Type

Nominal
Washer
Size
Hole Dia. Min.Hole Dia. Max.Rim
Width
Outside Dia. Min.Outside Dia. Max.ThicknessWCL Part
Number
Cross
Reference
60.1420.150.050.370.3810.022EXT-0135-01-001106-01
80.1680.1760.0930.4940.5060.02EXT0164-05-001108-05
100.1950.2040.0790.4940.5060.025EXT0190-07-001110-07
1/40.2560.2670.1960.8820.8980.045EXT0250-04-001114-04
1/40.2560.2670.1210.680.6950.039EXT0250-09-001114-09
1/40.2560.2670.1960.8820.8980.039EXT0250-16-001114-16
5/160.320.3320.0890.680.6950.035EXT0312-02-001118-02
3/80.3840.3980.130.8820.8980.039EXT0375-06-001120-06
3/80.3840.3980.2811.241.260.035EXT0375-09-001120-09
1/20.5120.5290.3071.381.410.055EXT0500-01-001124-01
1-1/41.2691.2930.1582.1722.2020.062EXT1250-01-001140-01
58531.561.580.1482.3592.3920.094EXT1562-01-001145-01

Internal Type

Nominal
Washer
Size
Hole Dia. Min.Hole Dia. Max.Rim
Width
Outside Dia. Min.Outside Dia. Max.ThicknessWCL Part
Number
Cross
Reference
60.1420.150.0440.3070.3170.025INT-0138-06-001206-06
80.1680.1760.120.4940.5060.017INT-0164-08-001208-08
100.1950.2040.0870.4950.5050.025INT-0190-01-001210-01
100.1950.2040.1860.7430.7580.02INT-0190-10-001210-10
1/40.2560.2670.2130.8060.8180.025INT-0250-07-001214-07
1/40.2560.2670.120.6180.6320.025INT-0250-09-001214-09
5/160.320.3320.1370.740.760.045INT-0312-05-001218-05
3/80.3840.3980.281.1471.1660.035INT-0375-06-001220-06
22.012.030.2192.8652.90.062INT-2000-01-001252-01