The Washer,lock, cataloged under National Stock Number 5310-01-567-9725, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-567-9725 |
| Primary Part Number | 91812A230 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Hardness Rating | 50.0 ROCKWELL C NOMINAL |
| Style Designator | TWO PIECE INTERLOCKING |
| Outside Diameter | 0.530 INCHES NOMINAL IN |
| Material | STEEL COMP 316 OVERALL |
| Hole Diameter | 0.340 INCHES NOMINAL 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 |
|---|---|
| 91812A230 | Mcmaster-Carr Supply Co (USA) |
| 91812A230 | Cascade Nut & Bolt, Inc Dba Cascade Nut & Bolt Inc (USA) |
| 91812A230 | Kampi Components Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 91812A230 | 3/9 Design control — primary reference Nord Lock Inc |
| 91812A230 | 5/9 Secondary reference Rby Industries |
NSN 5310-01-567-9725 is a Washer,lock, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-567-9725 has 3 manufacturer part numbers on file: 91812A230 (Mcmaster-Carr Supply Co), 91812A230 (Cascade Nut & Bolt, Inc Dba Cascade Nut & Bolt Inc), 91812A230 (Kampi Components Co Inc).
Key specifications for 91812A230: Overall Height: 0.090 INCHES MINIMUM IN; Hardness Rating: 50.0 ROCKWELL C NOMINAL; Style Designator: TWO PIECE INTERLOCKING; Outside Diameter: 0.530 INCHES NOMINAL IN. 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.