The Washer,lock, cataloged under National Stock Number 5310-00-773-7611, 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 Div Camloc Products. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-773-7611 |
| Primary Part Number | 4S9-4 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc Div Camloc Products |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS 2408-3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | FLAT INTERNAL TEETH |
| Outside Diameter | 0.513 INCHES MINIMUM AND 0.519 INCHES MAXIMUM IN |
| Material Thickness | 0.018 INCHES MINIMUM AND 0.022 INCHES MAXIMUM IN |
| Surface Treatment | TIN OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.341 INCHES MINIMUM AND 0.348 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 |
|---|---|
| 4S9-4 PRIMARY | Howmet Global Fastening Systems Inc Div Camloc Products (USA) |
NSN 5310-00-773-7611 is a Washer,lock, manufactured by Howmet Global Fastening Systems Inc Div Camloc Products, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-773-7611 has 1 manufacturer part number on file: 4S9-4 (Howmet Global Fastening Systems Inc Div Camloc Products).
Key specifications for 4S9-4: Surface Treatment Document and Classification: AMS 2408-3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 0.513 INCHES MINIMUM AND 0.519 INCHES MAXIMUM IN; Material Thickness: 0.018 INCHES MINIMUM AND 0.022 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.