The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-00-992-6538, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 11 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 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 | 5310-00-992-6538 |
| Primary Part Number | 537543 |
| Item Name | Washer,shouldered and Recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Shoulder Height | 0.120 INCHES NOMINAL IN |
| Style Designator | SHOULDERED AND RECESSED |
| Material Document and Classification | QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.500 INCHES NOMINAL IN |
| Recess Depth | 0.080 INCHES NOMINAL IN |
| Material Thickness | 0.060 INCHES NOMINAL IN |
| Shoulder Diameter | 0.387 INCHES MINIMUM AND 0.397 INCHES MAXIMUM IN |
| Recess Diameter | 0.280 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Hole Diameter | 0.155 INCHES MINIMUM AND 0.160 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 |
|---|---|
| 537543 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 5310-00-992-6538 is a Washer,shouldered and Recessed, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-992-6538 has 1 manufacturer part number on file: 537543 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-429-1702. Verify interchangeability with system specifications before substitution.
Key specifications for 537543: Shoulder Height: 0.120 INCHES NOMINAL IN; Style Designator: SHOULDERED AND RECESSED; Material Document and Classification: QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.500 INCHES NOMINAL IN. 11 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.