The Washer,key, cataloged under National Stock Number 5310-01-147-6747, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation. Government technical data includes 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-147-6747 |
| Primary Part Number | 71320191-001 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | +86112,CLASS 2,FSCM 04939 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Centerline to Inside of Prebent Key | 0.390 INCHES NOMINAL IN |
| External Prebent Key Length | 0.180 INCHES NOMINAL IN |
| Overall Distance Including Keys | 1.086 INCHES NOMINAL IN |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-5059,1/2 HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.780 INCHES NOMINAL IN |
| Material Thickness | 0.020 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| External Prebent Key Width | 0.160 INCHES NOMINAL IN |
| Material | STEEL COMP 301 OVERALL |
| Hole Diameter | 0.500 INCHES MINIMUM AND 0.510 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 |
|---|---|
| 71320191-001 PRIMARY | Lockheed Martin Corporation (USA) |
NSN 5310-01-147-6747 is a Washer,key, manufactured by Lockheed Martin Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-147-6747 has 1 manufacturer part number on file: 71320191-001 (Lockheed Martin Corporation).
Key specifications for 71320191-001: Surface Treatment Document and Classification: +86112,CLASS 2,FSCM 04939 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Distance From Centerline to Inside of Prebent Key: 0.390 INCHES NOMINAL IN; External Prebent Key Length: 0.180 INCHES NOMINAL IN; Overall Distance Including Keys: 1.086 INCHES NOMINAL IN. 12 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.