The Washer,lock, cataloged under National Stock Number 5310-01-197-2387, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Deere & Co. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-197-2387 |
| Primary Part Number | 12H 321 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Deere & Co |
| Status | ACTIVE |
| Style Designator | FLAT INTERNAL TEETH |
| Outside Diameter | 0.275 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN |
| Material Thickness | 0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Hole Diameter | 0.141 INCHES MINIMUM AND 0.150 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 |
|---|---|
| 12H 321 PRIMARY | Deere & Co (USA) |
| Reference | Meaning |
|---|---|
| 12H321 | 5/9 Secondary reference John Deere Construction & Forestry Company Div Direct Governmental Sales |
NSN 5310-01-197-2387 is a Washer,lock, manufactured by Deere & Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-197-2387 has 1 manufacturer part number on file: 12H 321 (Deere & Co).
Key specifications for 12H 321: Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 0.275 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN; Material Thickness: 0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN; Surface Treatment: ZINC OVERALL. 5 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.