ASME B18.21.1 Heavy Internal Tooth Lock Washers
ASME B18.21.1 Heavy Internal Tooth Lock
Washers Standard covers the dimensional requirements, physical properties, and related
test methods for helical spring-lock washers (#0 through 3 in.), tooth-lock washers (#2 through 1 3/4
in.), and plain washers (#0 through 3 in.).
The inclusion of dimensional data in ASME B18.21.1 Standard is not intended to imply that all
products described are stock production items. Consumers should consult with suppliers concerning the
availability of products.
ASME B18.21.1 Heavy Internal Tooth Lock Washers Dimensions (mm)
| Nominal Washer Size | Inside Diameter, A | Outside Diameter, B | Thickness, C | |||
|---|---|---|---|---|---|---|
| Max. | Min. | Max. | Min. | Max. | Min. | |
| ASME B18.21.1 1⁄4 (0.250) | 6.782 | 6.502 | 13.614 | 12.700 | 1.143 | 0.889 |
| ASME B18.21.1 5⁄16 (0.3125) | 8.433 | 8.128 | 15.418 | 14.986 | 1.270 | 1.016 |
| ASME B18.21.1 3⁄8 (0.375) | 10.109 | 9.754 | 18.999 | 17.780 | 1.270 | 1.067 |
| ASME B18.21.1 7⁄16 (0.4375) | 11.786 | 11.379 | 21.793 | 20.320 | 1.702 | 1.270 |
| ASME B18.21.1 1⁄2 (0.500) | 13.462 | 13.005 | 23.470 | 22.352 | 1.702 | 1.397 |
| ASME B18.21.1 9⁄16 (0.5625) | 15.138 | 14.630 | 26.264 | 25.146 | 1.702 | 1.397 |
| ASME B18.21.1 5⁄8 (0.625) | 16.840 | 16.256 | 28.829 | 27.940 | 1.702 | 1.499 |
| ASME B18.21.1 3⁄4 (0.750) | 20.193 | 19.507 | 32.131 | 31.496 | 2.134 | 1.778 |
| ASME B18.21.1 7⁄8 (0.875) | 23.546 | 22.708 | 36.754 | 35.560 | 2.134 | 1.905 |
ASME B18.21.1 Heavy Internal Tooth Lock Washers Dimensions (Inch)
| Nominal Washer Size | Inside Diameter, A | Outside Diameter, B | Thickness, C | |||
|---|---|---|---|---|---|---|
| Max. | Min. | Max. | Min. | Max. | Min. | |
| ASME B18.21.1 1⁄4 (0.250) | 6.782 | 6.502 | 13.614 | 12.700 | 1.143 | 0.889 |
| ASME B18.21.1 5⁄16 (0.3125) | 8.433 | 8.128 | 15.418 | 14.986 | 1.270 | 1.016 |
| ASME B18.21.1 3⁄8 (0.375) | 10.109 | 9.754 | 18.999 | 17.780 | 1.270 | 1.067 |
| ASME B18.21.1 7⁄16 (0.4375) | 11.786 | 11.379 | 21.793 | 20.320 | 1.702 | 1.270 |
| ASME B18.21.1 1⁄2 (0.500) | 13.462 | 13.005 | 23.470 | 22.352 | 1.702 | 1.397 |
| ASME B18.21.1 9⁄16 (0.5625) | 15.138 | 14.630 | 26.264 | 25.146 | 1.702 | 1.397 |
| ASME B18.21.1 5⁄8 (0.625) | 16.840 | 16.256 | 28.829 | 27.940 | 1.702 | 1.499 |
| ASME B18.21.1 1⁄4 (0.250) | 20.193 | 19.507 | 32.131 | 31.496 | 2.134 | 1.778 |
| ASME B18.21.1 7⁄8 (0.875) | 23.546 | 22.708 | 36.754 | 35.560 | 2.134 | 1.905 |
ASME Material Specifications
ASTM A693 Washers
ASTM F436/F436M
Washers
ASTM
F959/959M Direct Tension Squirter DTI Washers
ASTM
F2437/2437M Direct Tension Squirter DTI Washers
ASTM F844 Washers
ISO 898-3 Washers
ASTM A36 Washers
ASTM A240
Washers, Spacer, Flange
ASTM B96 Washers
ASTM B127 Washers
ASTM B162 Washers
ASTM B168 Washers
ASTM B171 Washers
ASTM B265 Washers
ASTM B409 Washers
ASTM B424 Washers
ASTM B551 Washers
ASTM B708 Washers
EN Material Specifications
ISO Material Specifications