The Washer,lock, cataloged under National Stock Number 5310-01-470-6570, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is West Coast Lockwasher Co., Inc. Dba West Coast Lockwasher Co Inc Div West Coast Lockwasher. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-470-6570 |
| Primary Part Number | 1983453-2 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | West Coast Lockwasher Co., Inc. Dba West Coast Lockwasher Co Inc Div West Coast Lockwasher |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM B633,TYPE I ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Material Document and Classification | QQ-S-700 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.487 INCHES MAXIMUM IN |
| Material Thickness | 0.062 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.252 INCHES MINIMUM AND 0.260 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 |
|---|---|
| 1983453-2 | West Coast Lockwasher Co., Inc. Dba West Coast Lockwasher Co Inc Div West Coast Lockwasher (USA) |
| 3024 | Midwest Fastener Supply Inc Dba Midwest Fastener Supply Inc (USA) |
| Reference | Meaning |
|---|---|
| 12975453-2 | 7/2 Vendor item drawing reference Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| 5850-19-Z1 | 3/2 Design control — primary reference U.S. Government activity |
| 12975453 | D/9 Drawing number reference only Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
NSN 5310-01-470-6570 is a Washer,lock, manufactured by West Coast Lockwasher Co., Inc. Dba West Coast Lockwasher Co Inc Div West Coast Lockwasher, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-470-6570 has 2 manufacturer part numbers on file: 1983453-2 (West Coast Lockwasher Co., Inc. Dba West Coast Lockwasher Co Inc Div West Coast Lockwasher), 3024 (Midwest Fastener Supply Inc Dba Midwest Fastener Supply Inc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-470-6577. Verify interchangeability with system specifications before substitution.
Key specifications for 1983453-2: Surface Treatment Document and Classification: ASTM B633,TYPE I ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: QQ-S-700 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.487 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.