The Washer,key, cataloged under National Stock Number 5310-01-056-3240, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fabrication Specialty Inc Dba Fabrication Specialty Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-056-3240 |
| Primary Part Number | 803-4631849PC49 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fabrication Specialty Inc Dba Fabrication Specialty Inc |
| Status | ACTIVE |
| Overall Distance Including Keys | 1.250 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 0.875 INCHES NOMINAL IN |
| Material Thickness | 0.032 INCHES NOMINAL IN |
| External Straight Key Width | 0.312 INCHES NOMINAL IN |
| External Key Quantity | 7 |
| Material | STEEL COMP 304 OVERALL |
| Hole Diameter | 0.531 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 |
|---|---|
| 803-4631849PC49 | Fabrication Specialty Inc Dba Fabrication Specialty Inc (USA) |
| Reference | Meaning |
|---|---|
| 803-4631849PC49 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-056-3240 is a Washer,key, manufactured by Fabrication Specialty Inc Dba Fabrication Specialty Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-056-3240 has 1 manufacturer part number on file: 803-4631849PC49 (Fabrication Specialty Inc Dba Fabrication Specialty Inc).
Key specifications for 803-4631849PC49: Overall Distance Including Keys: 1.250 INCHES NOMINAL IN; Style Designator: KEY; Outside Diameter: 0.875 INCHES NOMINAL IN; Material Thickness: 0.032 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.