The Washer,recessed, cataloged under National Stock Number 5310-00-515-8522, 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 7 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-515-8522 |
| Primary Part Number | 3211900 |
| Item Name | Washer,recessed |
| 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 |
| Style Designator | RECESSED |
| Material Document and Classification | QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.625 INCHES NOMINAL IN |
| Recess Depth | 1.125 INCHES NOMINAL IN |
| Material Thickness | 0.250 INCHES NOMINAL IN |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 0.656 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 |
|---|---|
| 3211900 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 3211900 | 3/9 Design control — primary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 63459 | 5/9 Secondary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 63459 | 5/9 Secondary reference U.S. Government activity |
| 3211900 | 5/9 Secondary reference U.S. Government activity |
| 63459 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-515-8522 is a Washer,recessed, 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 5310-00-515-8522 has 1 manufacturer part number on file: 3211900 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions).
3 possible matches (shared part number, not a government interchangeability claim): 5950-00-724-5296, 5310-01-133-9471, 5915-01-254-0690. Verify interchangeability with system specifications before substitution.
Key specifications for 3211900: Overall Height: 1.250 INCHES NOMINAL IN; Style Designator: RECESSED; Material Document and Classification: QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 2.625 INCHES NOMINAL IN. 7 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.