The Washer,recessed, cataloged under National Stock Number 5310-01-337-2358, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-337-2358 |
| Primary Part Number | 13231057-5 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation |
| Status | ACTIVE |
| Top Recess Angle | 85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM |
| Style Designator | RECESSED BOTH SIDES |
| Outside Diameter | 0.720 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN |
| Material Thickness | 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN |
| Bottom Recess Angle | 85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM |
| Material | PLASTIC NYLON OVERALL |
| Hole Diameter | 0.381 INCHES MINIMUM AND 0.401 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 |
|---|---|
| 13231057-5 PRIMARY | Lockheed Martin Corporation (USA) |
| Reference | Meaning |
|---|---|
| 13231057-5 | 5/9 Secondary reference Program Manager Advanced Attack Helicopter Barcom Amcpm-Aah |
NSN 5310-01-337-2358 is a Washer,recessed, manufactured by Lockheed Martin Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-337-2358 has 1 manufacturer part number on file: 13231057-5 (Lockheed Martin Corporation).
Key specifications for 13231057-5: Top Recess Angle: 85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM; Style Designator: RECESSED BOTH SIDES; Outside Diameter: 0.720 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN; Material Thickness: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN. 7 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.