The Washer,seal, cataloged under National Stock Number 5310-01-729-7288, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-729-7288 |
| Primary Part Number | 312-7711 |
| Item Name | Washer,seal |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Outside Diameter | 1.024 INCHES NOMINAL IN |
| Major Thickness | 0.197 INCHES NOMINAL IN |
| Material | ZINC ALLOY OVERALL |
| Hole Diameter | 0.642 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 |
|---|---|
| 312-7711 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5310-01-729-7288 is a Washer,seal, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-729-7288 has 1 manufacturer part number on file: 312-7711 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 312-7711: Outside Diameter: 1.024 INCHES NOMINAL IN; Major Thickness: 0.197 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: STEEL FLAT WASHER; Material: ZINC ALLOY OVERALL. 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.