The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-01-121-8529, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-121-8529 |
| Primary Part Number | 74A410551-2003 |
| Item Name | Washer,shouldered and Recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES TOP |
| Shoulder Height | 0.540 INCHES NOMINAL IN |
| Style Designator | SHOULDERED AND RECESSED |
| Material Document and Classification | QQ-C-530,TEMPER AT FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 3.504 INCHES MINIMUM AND 3.506 INCHES MAXIMUM IN |
| Material Thickness | 0.089 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Shoulder Diameter | 3.1900 INCHES MINIMUM AND 3.1915 INCHES MAXIMUM IN |
| Recess Diameter | 3.130 INCHES MINIMUM AND 3.135 INCHES MAXIMUM IN |
| Material | COPPER ALLOY 172 OVERALL |
| Hole Diameter | 2.9700 INCHES MINIMUM AND 2.9750 INCHES MAXIMUM IN |
| Recess Angle | 88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM |
| 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 |
|---|---|
| 74A410551-2003 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10109389 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-01-121-8529 is a Washer,shouldered and Recessed, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-121-8529 has 1 manufacturer part number on file: 74A410551-2003 (The Boeing Company Div Defense).
Key specifications for 74A410551-2003: Surface Finish: 63.0 MICROINCHES TOP; Shoulder Height: 0.540 INCHES NOMINAL IN; Style Designator: SHOULDERED AND RECESSED; Material Document and Classification: QQ-C-530,TEMPER AT FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.