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Flat washers, inch: SAE and USS, 1/4 to 3/4 in (ASME B18.21.1 Type A)
What is the difference between SAE and USS washers? · Standard part · basis: ASME B18.21.1 Type A plain washers, narrow (SAE) and wide (USS): ID, OD, thickness (nominal)
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 14 in table
Notes
- SAE washers are narrow (fit under socket heads and in tight spots); USS are wide (spread load on wood and soft material).
Sizes
| size | type | id_in | od_in | thickness_in |
|---|---|---|---|---|
| 1/4 | USS | 0.312 | 0.734 | 0.065 |
| 1/4 | SAE | 0.281 | 0.625 | 0.065 |
| 5/16 | USS | 0.375 | 0.875 | 0.083 |
| 5/16 | SAE | 0.344 | 0.688 | 0.065 |
| 3/8 | USS | 0.438 | 1.0 | 0.083 |
| 3/8 | SAE | 0.406 | 0.812 | 0.065 |
| 7/16 | USS | 0.5 | 1.25 | 0.083 |
| 7/16 | SAE | 0.469 | 0.922 | 0.065 |
| 1/2 | USS | 0.562 | 1.375 | 0.109 |
| 1/2 | SAE | 0.531 | 1.062 | 0.095 |
| 5/8 | USS | 0.688 | 1.75 | 0.134 |
| 5/8 | SAE | 0.656 | 1.312 | 0.095 |
| 3/4 | USS | 0.812 | 2.0 | 0.148 |
| 3/4 | SAE | 0.812 | 1.469 | 0.134 |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| ASME | ASME B18.21.1 Washers: helical spring-lock, tooth lock, and plain washers (inch) | standard | ASME; dimensions are facts verify |
Free files
★ Free files 14 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| washer-uss-1-4-20 | 1/4 in USS flat washer: 0.312 × 0.734 × 0.065 in | STEP · STL |
| washer-sae-1-4-20 | 1/4 in SAE flat washer: 0.281 × 0.625 × 0.065 in | STEP · STL |
| washer-uss-5-16-18 | 5/16 in USS flat washer: 0.375 × 0.875 × 0.083 in | STEP · STL |
| washer-sae-5-16-18 | 5/16 in SAE flat washer: 0.344 × 0.688 × 0.065 in | STEP · STL |
| washer-uss-3-8-16 | 3/8 in USS flat washer: 0.438 × 1.000 × 0.083 in | STEP · STL |
| washer-sae-3-8-16 | 3/8 in SAE flat washer: 0.406 × 0.812 × 0.065 in | STEP · STL |
| washer-uss-7-16-14 | 7/16 in USS flat washer: 0.500 × 1.250 × 0.083 in | STEP · STL |
| washer-sae-7-16-14 | 7/16 in SAE flat washer: 0.469 × 0.922 × 0.065 in | STEP · STL |
| washer-uss-1-2-13 | 1/2 in USS flat washer: 0.562 × 1.375 × 0.109 in | STEP · STL |
| washer-sae-1-2-13 | 1/2 in SAE flat washer: 0.531 × 1.062 × 0.095 in | STEP · STL |
| washer-uss-5-8-11 | 5/8 in USS flat washer: 0.688 × 1.750 × 0.134 in | STEP · STL |
| washer-sae-5-8-11 | 5/8 in SAE flat washer: 0.656 × 1.312 × 0.095 in | STEP · STL |
| washer-uss-3-4-10 | 3/4 in USS flat washer: 0.812 × 2.000 × 0.148 in | STEP · STL |
| washer-sae-3-4-10 | 3/4 in SAE flat washer: 0.812 × 1.469 × 0.134 in | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=flat-washers-inch
Fits with
Free
Hex bolts, inch: 1/4-20 to 3/4-10 (ASME B18.2.1)7 sizes★ 47 filesFree
Hex nuts, inch: #4-40 to 3/4-10 (ASME B18.2.2)12 sizes★ 12 filesFree
Socket head cap screws, inch: #10-24, #10-32, 5/16-18, 3/8-16, 1/2-13 (ASME B18.3)5 sizes★ 25 filesFree
Button head socket cap screws, inch: #4-40 to 1/2-13 (ASME B18.3)9 sizes★ 25 filesFree
Imperial machine screws: #4-40, #6-32, #8-32, 1/4-204 sizes★ 18 files
Questions
SAE or USS?
SAE for metal and tight spaces, USS for wood and soft material.