The Washer,flat, cataloged under National Stock Number 5310-01-526-1890, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-526-1890 |
| Primary Part Number | BACW10CA12CVU |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35,TYPE 11,TYPE V1 OR TYPE 111 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.300 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS 2416 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL CORROSION RESISTING OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.911 INCHES NOMINAL IN |
| Thickness | 0.215 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 | Y |
| Part Number | Manufacturer |
|---|---|
| BACW10CA12CVU PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| BACW10CA | D/9 Drawing number reference only U.S. Government activity |
| BACW10CA12CVU | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-526-1890 is a Washer,flat, manufactured by The Boeing Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-526-1890 has 1 manufacturer part number on file: BACW10CA12CVU (The Boeing Company).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-542-3957. Verify interchangeability with system specifications before substitution.
Key specifications for BACW10CA12CVU: Surface Treatment Document and Classification: QQ-P-35,TYPE 11,TYPE V1 OR TYPE 111 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.300 INCHES NOMINAL IN; Criticality Code Justification: AGAV; Material Document and Classification: AMS 2416 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 11 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.