The Washer,recessed, cataloged under National Stock Number 5310-00-558-9261, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcgill Aircraft Parts, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-558-9261 |
| Primary Part Number | 2543623 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcgill Aircraft Parts, Inc. |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | QQ-A-225/6,TEMPER T FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.875 INCHES NOMINAL IN |
| Recess Depth | 0.093 INCHES NOMINAL IN |
| Material Thickness | 0.062 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Hole Diameter | 0.500 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 |
|---|---|
| 2543623 | Mcgill Aircraft Parts, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2543623 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2543623 | 5/9 Secondary reference Air-Com, Inc. Dba Air-Com, Inc. |
| 2543623 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-558-9261 is a Washer,recessed, manufactured by Mcgill Aircraft Parts, Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-558-9261 has 1 manufacturer part number on file: 2543623 (Mcgill Aircraft Parts, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 7690-01-538-0156. Verify interchangeability with system specifications before substitution.
Key specifications for 2543623: Overall Height: 0.160 INCHES NOMINAL IN; Style Designator: RECESSED; Material Document and Classification: QQ-A-225/6,TEMPER T FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.875 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.