The Washer,recessed, cataloged under National Stock Number 5310-00-296-3273, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems. Government technical data includes 10 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-296-3273 |
| Primary Part Number | 163B5711 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| Status | ACTIVE |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM |
| Style Designator | RECESSED |
| Material Document and Classification | QQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Recess Depth | 0.108 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN |
| Material Thickness | 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Recess Diameter | 0.516 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN |
| Material | STEEL COMP 4140 OR STEEL OVERALL |
| Hole Diameter | 0.285 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN |
| Recess Angle | 99.0 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 |
| Part Number | Manufacturer |
|---|---|
| 163B5711 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
NSN 5310-00-296-3273 is a Washer,recessed, manufactured by General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-296-3273 has 1 manufacturer part number on file: 163B5711 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 163B5711: Hardness Rating: 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM; Style Designator: RECESSED; Material Document and Classification: QQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL; Outside Diameter: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN. 10 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.