The Washer,shouldered, cataloged under National Stock Number 5310-01-022-3828, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Hi-Grade Products Co Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-022-3828 |
| Primary Part Number | 18376-6 |
| Item Name | Washer,shouldered |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Hi-Grade Products Co Inc |
| Status | ACTIVE |
| Shoulder Height | 0.045 INCHES NOMINAL IN |
| Style Designator | SHOULDERED |
| Material Document and Classification | MIL-P-20963 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.375 INCHES NOMINAL IN |
| Material Thickness | 0.050 INCHES NOMINAL IN |
| Shoulder Diameter | 0.240 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN |
| Material | PLASTIC POLYAMIDE NYLON OVERALL |
| Hole Diameter | 0.160 INCHES NOMINAL 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 |
|---|---|
| 18376-6 PRIMARY | Hi-Grade Products Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 18376-6 | 5/9 Secondary reference Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit |
| 40086-6 | 7/2 Vendor item drawing reference Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit |
| 18376-6 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5310-01-022-3828 is a Washer,shouldered, manufactured by Hi-Grade Products Co Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-022-3828 has 1 manufacturer part number on file: 18376-6 (Hi-Grade Products Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 5815-01-064-4903. Verify interchangeability with system specifications before substitution.
Key specifications for 18376-6: Shoulder Height: 0.045 INCHES NOMINAL IN; Style Designator: SHOULDERED; Material Document and Classification: MIL-P-20963 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.375 INCHES NOMINAL IN. 8 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.