The Washer,keyway, cataloged under National Stock Number 5310-01-381-3066, 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 6 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-381-3066 |
| Primary Part Number | 12687B18 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Overall Distance Including Keys | 4.190 INCHES NOMINAL IN |
| Outside Diameter | 4.560 INCHES NOMINAL IN |
| Material Thickness | 0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN |
| External Prebent Key Width | 0.310 INCHES NOMINAL IN |
| Material | TITANIUM OVERALL |
| Hole Diameter | 4.060 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 |
|---|---|
| 12687B18 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| 403D257CX10 | 3/9 Design control — primary reference U.S. Government activity |
| 403D257CX10 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| 12050B18 | 5/9 Secondary reference U.S. Government activity |
| 12132F18-257B | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-381-3066 is a Washer,keyway, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-381-3066 has 1 manufacturer part number on file: 12687B18 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 12687B18: Overall Distance Including Keys: 4.190 INCHES NOMINAL IN; Outside Diameter: 4.560 INCHES NOMINAL IN; Material Thickness: 0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN; External Prebent Key Width: 0.310 INCHES NOMINAL IN. 6 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.