The Washer,flat, cataloged under National Stock Number 5310-01-519-8941, 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. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-519-8941 |
| Primary Part Number | BACW10BP3NAPU |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Boeing Defence Australia Ltd |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OR AMS QQ-P-35, TYPE II OR VIII ASSN STD 2ND TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.369 INCHES MINIMUM AND 0.389 INCHES MAXIMUM IN |
| Material Document and Classification | AMS6350 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6351 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6345 ASSN STD SINGLE MATERIAL RESPONSE OR AMS8735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6357 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6352 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 4130 OR STEEL COMP 4135 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.190 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN |
| Thickness | 0.012 INCHES MINIMUM AND 0.020 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 |
|---|---|
| BACW10BP3NAPU | Boeing Defence Australia Ltd (AUS) |
| BACW10BP3NAPU | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| Reference | Meaning |
|---|---|
| BACW10BP3NAPU | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-519-8941 is a Washer,flat, manufactured by Boeing Defence Australia Ltd, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-519-8941 has 2 manufacturer part numbers on file: BACW10BP3NAPU (Boeing Defence Australia Ltd), BACW10BP3NAPU (Boeing Defence Australia Ltd Div Defense, Space & Security).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-669-7029. Verify interchangeability with system specifications before substitution.
Key specifications for BACW10BP3NAPU: Surface Treatment Document and Classification: QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OR AMS QQ-P-35, TYPE II OR VIII ASSN STD 2ND TREATMENT RESPONSE OVERALL; Overall Diameter: 0.369 INCHES MINIMUM AND 0.389 INCHES MAXIMUM IN; Material Document and Classification: AMS6350 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6351 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6345 ASSN STD SINGLE MATERIAL RESPONSE OR AMS8735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6357 ASSN STD SINGLE MATERIAL RESPONSE OR AMS6352 ASSN STD 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.