The Washer,key, cataloged under National Stock Number 5310-00-862-6031, 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 Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-862-6031 |
| Primary Part Number | 7040B |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| Status | ACTIVE |
| Internal Straight Key Width | 0.172 INCHES NOMINAL IN |
| Style Designator | KEY |
| Material Document and Classification | MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.906 INCHES NOMINAL IN |
| Material Thickness | 0.043 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN |
| Material | COPPER ALLOY 706 OR COPPER ALLOY 715 OVERALL |
| Internal Key Quantity | 1 |
| Hole Diameter | 0.505 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 |
|---|---|
| 7040B PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 200122K149 | 5/9 Secondary reference U.S. Government activity |
| 200122KPC149 | 5/9 Secondary reference U.S. Government activity |
| 7040B | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 200122KPC149 | 5/9 Secondary reference U.S. Government activity |
| 7040B | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-862-6031 is a Washer,key, manufactured by Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-862-6031 has 1 manufacturer part number on file: 7040B (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions).
1 possible match (shared part number, not a government interchangeability claim): 6620-01-067-9285. Verify interchangeability with system specifications before substitution.
Key specifications for 7040B: Internal Straight Key Width: 0.172 INCHES NOMINAL IN; Style Designator: KEY; Material Document and Classification: MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.906 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.