The Washer,flat, cataloged under National Stock Number 5310-01-070-7128, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Boeing Defence Australia Ltd Div Defense, Space & Security. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-070-7128 |
| Primary Part Number | BACW10BP12APU |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Boeing Defence Australia Ltd Div Defense, Space & Security |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.230 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Specification/standard Data | 81205-BACW10BP MANUFACTURERS STANDARD |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 8617 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.750 INCHES MINIMUM AND 0.761 INCHES MAXIMUM IN |
| Thickness | 0.073 INCHES MINIMUM AND 0.087 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 |
|---|---|
| BACW10BP12APU | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| BACW10BP12APU | Boeing Defence Australia Ltd (AUS) |
| Reference | Meaning |
|---|---|
| BACW10BP12APU | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-070-7128 is a Washer,flat, manufactured by Boeing Defence Australia Ltd Div Defense, Space & Security, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-070-7128 has 2 manufacturer part numbers on file: BACW10BP12APU (Boeing Defence Australia Ltd Div Defense, Space & Security), BACW10BP12APU (Boeing Defence Australia Ltd).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-669-7017. Verify interchangeability with system specifications before substitution.
Key specifications for BACW10BP12APU: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.230 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Specification/standard Data: 81205-BACW10BP MANUFACTURERS STANDARD. 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.