The Washer,keyway, cataloged under National Stock Number 5310-01-397-0364, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-397-0364 |
| Primary Part Number | 6401267 ITEM 70 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Internal Straight Key Width | 0.120 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.300 INCHES NOMINAL IN |
| Material Thickness | 0.062 INCHES NOMINAL IN |
| External Straight Key Width | 0.375 INCHES NOMINAL IN |
| External Key Quantity | 12 |
| Material | NICKEL ALLOY 400 OVERALL |
| Hole Diameter | 1.531 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 |
|---|---|
| 6401691-1 | Naval Sea Systems Command (USA) |
| 6401267 ITEM 70 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 211056476 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 595-6401267 ITEM 70 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 5310-01-397-0364 is a Washer,keyway, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-397-0364 has 2 manufacturer part numbers on file: 6401691-1 (Naval Sea Systems Command), 6401267 ITEM 70 (Naval Sea Systems Command).
Key specifications for 6401267 ITEM 70: Internal Straight Key Width: 0.120 INCHES NOMINAL IN; Material Document and Classification: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 2.300 INCHES NOMINAL IN; Material Thickness: 0.062 INCHES NOMINAL 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.