The Washer,seal, cataloged under National Stock Number 5310-01-641-8989, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Department of Defense Project Manager-Mobile Electric Power. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-641-8989 |
| Primary Part Number | 04-20289 |
| Item Name | Washer,seal |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Department of Defense Project Manager-Mobile Electric Power |
| Status | ACTIVE |
| Style Designator | CONCAVE |
| Outside Diameter | 26.7 MILLIMETERS MINIMUM AND 26.7 MILLIMETERS MINIMUM AND 27.2 MILLIMETERS MAXIMUM27.2 MILLIMETERS MAXIMUM MM |
| Material | COPPER ALLOY 110 OVERALL |
| Hole Diameter | 17.3 MILLIMETERS MINIMUM AND 17.3 MILLIMETERS MINIMUM AND 17.5 MILLIMETERS MAXIMUM17.5 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| 04-20289 PRIMARY | Department of Defense Project Manager-Mobile Electric Power (USA) |
| Reference | Meaning |
|---|---|
| 5716-143-93 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-641-8989 is a Washer,seal, manufactured by Department of Defense Project Manager-Mobile Electric Power, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-641-8989 has 1 manufacturer part number on file: 04-20289 (Department of Defense Project Manager-Mobile Electric Power).
Key specifications for 04-20289: Overall Height: 2.2 MILLIMETERS MINIMUM AND 2.2 MILLIMETERS MINIMUM AND 2.4 MILLIMETERS MAXIMUM2.4 MILLIMETERS MAXIMUM MM; Style Designator: CONCAVE; Outside Diameter: 26.7 MILLIMETERS MINIMUM AND 26.7 MILLIMETERS MINIMUM AND 27.2 MILLIMETERS MAXIMUM27.2 MILLIMETERS MAXIMUM MM; Part Name Assigned by Controlling Agency: WASHER, SEALING M16WASHER, SEALING M16. 4 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.