The Washer,concave, cataloged under National Stock Number 5310-01-613-4265, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 8 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 | 5310-01-613-4265 |
| Primary Part Number | K52207-P08 |
| Item Name | Washer,concave |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Radius | 0.169 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Style Designator | CONCAVE |
| Outside Diameter | 0.305 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN |
| Material Thickness | 0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 4340 OR STEEL COMP 8740 OVERALL |
| Hole Diameter | 0.213 INCHES MINIMUM AND 0.219 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 |
|---|---|
| K52207-P08 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
NSN 5310-01-613-4265 is a Washer,concave, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-613-4265 has 1 manufacturer part number on file: K52207-P08 (Howmet Global Fastening Systems Inc).
Key specifications for K52207-P08: Surface Treatment Document and Classification: QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Radius: 0.169 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Style Designator: CONCAVE; Outside Diameter: 0.305 INCHES MINIMUM AND 0.315 INCHES MAXIMUM 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.