The Washer,shouldered, cataloged under National Stock Number 5310-01-012-3596, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Tescom Corp Dba Tescom Div Tescom. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-012-3596 |
| Primary Part Number | 920-28 |
| Item Name | Washer,shouldered |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Tescom Corp Dba Tescom Div Tescom |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES BOTTOM |
| Surface Finish | 64.0 MICROINCHES TOP |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Height | 0.039 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN |
| Style Designator | SHOULDERED |
| Material Document and Classification | QQ-A-225/3,T3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.873 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN |
| Material Thickness | 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.620 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 2011 OVERALL |
| Hole Diameter | 0.377 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 920-28 PRIMARY | Tescom Corp Dba Tescom Div Tescom (USA) |
| Reference | Meaning |
|---|---|
| 920-28 | 5/9 Secondary reference Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
| 920-28 | 5/9 Secondary reference Davey Compressor Co Div of Keco Industries Inc |
| 5310PL0633156 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5310-01-012-3596 is a Washer,shouldered, manufactured by Tescom Corp Dba Tescom Div Tescom, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-012-3596 has 1 manufacturer part number on file: 920-28 (Tescom Corp Dba Tescom Div Tescom).
1 possible match (shared part number, not a government interchangeability claim): 4810-01-067-5287. Verify interchangeability with system specifications before substitution.
Key specifications for 920-28: Surface Finish: 32.0 MICROINCHES BOTTOM; Surface Finish: 64.0 MICROINCHES TOP; Surface Treatment Document and Classification: MIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Shoulder Height: 0.039 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN. 12 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.