The Washer,flat, cataloged under National Stock Number 5310-01-132-8561, 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 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-132-8561 |
| Primary Part Number | 1B48091-1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Surface Treatment Document and Classification | PS13201,TYPE 2,CLASS 1,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.580 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-A-225/8,T651 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ANODIZE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 6061 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.190 INCHES MINIMUM AND 0.199 INCHES MAXIMUM IN |
| Thickness | 0.045 INCHES MINIMUM AND 0.065 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 |
|---|---|
| 1B48091-1 PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 10109665 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-01-132-8561 is a Washer,flat, manufactured by The Boeing Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-132-8561 has 1 manufacturer part number on file: 1B48091-1 (The Boeing Company).
Key specifications for 1B48091-1: Surface Treatment Document and Classification: PS13201,TYPE 2,CLASS 1,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.580 INCHES MINIMUM AND 0.600 INCHES MAXIMUM IN; Material Document and Classification: QQ-A-225/8,T651 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 10 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.