The Washer,recessed, cataloged under National Stock Number 5310-01-049-5690, 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 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-049-5690 |
| Primary Part Number | BACW10BP10ACU |
| Item Name | Washer,recessed |
| 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 |
| Style Designator | RECESSED |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.050 INCHES MINIMUM AND 1.070 INCHES MAXIMUM IN |
| Material Thickness | 0.073 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN |
| Specification/standard Data | 81205-BACW10BP MANUFACTURERS STANDARD |
| Recess Diameter | 0.770 INCHES MINIMUM AND 0.790 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 140000 POUNDS PER SQUARE INCH LBS |
| Material | IRON ALLOY 660 OVERALL |
| Hole Diameter | 0.625 INCHES MINIMUM AND 0.636 INCHES MAXIMUM IN |
| Recess Angle | 45.0 DEGREES MINIMUM AND 50.0 DEGREES MAXIMUM |
| 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 |
|---|---|
| BACW10BP10ACU | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| BACW10BP10ACU | Boeing Defence Australia Ltd (AUS) |
| Reference | Meaning |
|---|---|
| BACW10BP10ACU | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-049-5690 is a Washer,recessed, manufactured by Boeing Defence Australia Ltd Div Defense, Space & Security, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-049-5690 has 2 manufacturer part numbers on file: BACW10BP10ACU (Boeing Defence Australia Ltd Div Defense, Space & Security), BACW10BP10ACU (Boeing Defence Australia Ltd).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-669-7016. Verify interchangeability with system specifications before substitution.
Key specifications for BACW10BP10ACU: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: RECESSED; Material Document and Classification: AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.050 INCHES MINIMUM AND 1.070 INCHES MAXIMUM IN. 12 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.