The Washer,flat, cataloged under National Stock Number 5310-01-446-8511, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-446-8511 |
| Primary Part Number | 12A5-M-6 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Material Document and Classification | QQ-N-281, CLA OR CLB FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Material | NICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.500 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 |
|---|---|
| 12A5-M-6 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| 12A5-M-6 | 3/9 Design control — primary reference U.S. Government activity |
| W-249792 REV L ITEM NO. 212C | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-446-8511 is a Washer,flat, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-446-8511 has 1 manufacturer part number on file: 12A5-M-6 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 12A5-M-6: Material Document and Classification: QQ-N-281, CLA OR CLB FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Material: NICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL; Center Hole Shape Style: ROUND; Hole Diameter: 0.500 INCHES NOMINAL IN. 4 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.