The Washer,lock, cataloged under National Stock Number 5310-01-481-1664, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-481-1664 |
| Primary Part Number | 122-2404752 PC 65 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Material Document and Classification | FED STD NO 66,1060 TO 1080 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.680 INCHES NOMINAL IN |
| Material Thickness | 0.094 INCHES NOMINAL IN |
| Material | STEEL COMP 1060 OR STEEL COMP 1064 OR STEEL COMP 1065 OR STEEL COMP 1566 OR STEEL COMP 1069 OR STEEL COMP 1070 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OVERALL |
| Hole Diameter | 0.377 INCHES MINIMUM AND 0.385 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 |
|---|---|
| 122-2404752 PC 65 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 2404752 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 5310-01-481-1664 is a Washer,lock, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-481-1664 has 1 manufacturer part number on file: 122-2404752 PC 65 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-481-1670, 3120-01-481-4972. Verify interchangeability with system specifications before substitution.
Key specifications for 122-2404752 PC 65: Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM; Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: FED STD NO 66,1060 TO 1080 FED STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.680 INCHES NOMINAL 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.