The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-00-774-4996, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sealcraft Corporation. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-774-4996 |
| Primary Part Number | 52503 |
| Item Name | Washer,shouldered and Recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sealcraft Corporation |
| Status | ACTIVE |
| Shoulder Height | 0.060 INCHES NOMINAL IN |
| Style Designator | SHOULDERED AND RECESSED |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Material Thickness | 0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.310 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN |
| Material | STEEL COMP 1213 OVERALL |
| Hole Diameter | 0.186 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Recess Angle | 90.0 DEGREES NOMINAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-00-774-4996 is a Washer,shouldered and Recessed, manufactured by Sealcraft Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-774-4996 has 2 manufacturer part numbers on file: 52503 (Sealcraft Corporation), 7744996 (U S Army Tank Automotive Command Amsta-Im-Mm).
2 possible matches (shared part number, not a government interchangeability claim): 6130-01-338-1852, 6130-01-567-3318. Verify interchangeability with system specifications before substitution.
Key specifications for 52503: Shoulder Height: 0.060 INCHES NOMINAL IN; Style Designator: SHOULDERED AND RECESSED; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN. 9 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.