The Washer,key, cataloged under National Stock Number 5310-00-522-3047, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Fmc Corp. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-522-3047 |
| Primary Part Number | P1399 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Fmc Corp |
| Status | ACTIVE |
| Overall Distance Including Keys | 6.057 INCHES MINIMUM AND 6.067 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | QQ-S-698 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 5.687 INCHES NOMINAL IN |
| Material Thickness | 0.0548 INCHES MINIMUM AND 0.0648 INCHES MAXIMUM IN |
| External Straight Key Width | 0.354 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN |
| External Key Quantity | 9 |
| Material | STEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL |
| Hole Diameter | 5.281 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 |
|---|---|
| P1399 PRIMARY | Fmc Corp (USA) |
| Reference | Meaning |
|---|---|
| P1399 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-522-3047 is a Washer,key, manufactured by Fmc Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-522-3047 has 1 manufacturer part number on file: P1399 (Fmc Corp).
Key specifications for P1399: Overall Distance Including Keys: 6.057 INCHES MINIMUM AND 6.067 INCHES MAXIMUM IN; Style Designator: KEY; Material Document and Classification: QQ-S-698 FED SPEC ALL MATERIAL RESPONSES OVERALL; Outside Diameter: 5.687 INCHES NOMINAL IN. 9 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.