The Washer,lock, cataloged under National Stock Number 5310-01-386-9059, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Prestolite Electric Inc. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-386-9059 |
| Primary Part Number | 37-320 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Prestolite Electric Inc |
| Status | ACTIVE |
| Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.673 INCHES NOMINAL IN |
| Material Thickness | 0.070 INCHES NOMINAL IN |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL COMP 1060 OR STEEL COMP 1062 OR STEEL COMP 1064 OR STEEL COMP 1065 OR STEEL COMP 1069 OR STEEL COMP 1070 OR STEEL COMP 1071 OVERALL |
| Hole Diameter | 0.382 INCHES MINIMUM AND 0.393 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 |
|---|---|
| 37-320 PRIMARY | Prestolite Electric Inc (USA) |
| 66X-0201 | Prestolite Electric Inc (USA) |
| Reference | Meaning |
|---|---|
| 66X-0201 | 5/9 Secondary reference Prestolite Electric Inc |
| 66X-0201 | 5/9 Secondary reference Prestolite Electric Inc |
| 37-320 | 5/9 Secondary reference Prestolite Electric Inc |
NSN 5310-01-386-9059 is a Washer,lock, manufactured by Prestolite Electric Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-386-9059 has 2 manufacturer part numbers on file: 37-320 (Prestolite Electric Inc), 66X-0201 (Prestolite Electric Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5365-01-478-4487, 5340-01-651-1999. Verify interchangeability with system specifications before substitution.
Key specifications for 37-320: Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM; Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.673 INCHES NOMINAL IN; Material Thickness: 0.070 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.