The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-01-243-9437, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-243-9437 |
| Item Name | Washer,shouldered and Recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Shoulder Height | 0.340 INCHES NOMINAL IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | ASTM A322 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 5.880 INCHES NOMINAL IN |
| Material Thickness | 0.159 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN |
| Shoulder Diameter | 4.560 INCHES NOMINAL IN |
| Material | STEEL COMP 4140 OR STEEL COMP 4142 OR STEEL COMP 8640 OVERALL |
| Hole Diameter | 4.025 INCHES MINIMUM AND 4.035 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 |
| Reference | Meaning |
|---|---|
| 13211E8712 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-243-9437 is a Washer,shouldered and Recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-243-9437: Shoulder Height: 0.340 INCHES NOMINAL IN; Hardness Rating: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM; Material Document and Classification: ASTM A322 ASSN STD ALL MATERIAL RESPONSES OVERALL; Outside Diameter: 5.880 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.