The Washer,recessed, cataloged under National Stock Number 5310-01-121-5538, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Federal-Mogul Corp Government Sales Dept. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-121-5538 |
| Primary Part Number | N-4512 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Federal-Mogul Corp Government Sales Dept |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 3.152 INCHES MINIMUM AND 3.157 INCHES MAXIMUM IN |
| Material Thickness | 0.030 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Hole Diameter | 3.150 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 |
NSN 5310-01-121-5538 is a Washer,recessed, manufactured by Federal-Mogul Corp Government Sales Dept, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-121-5538 has 2 manufacturer part numbers on file: 234999 (Dana Off Highway Products, Llc), N-4512 (Federal-Mogul Corp Government Sales Dept).
Key specifications for N-4512: Overall Height: 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN; Style Designator: RECESSED; Material Document and Classification: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 3.152 INCHES MINIMUM AND 3.157 INCHES MAXIMUM IN. 6 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.