The Washer,recessed, cataloged under National Stock Number 5310-01-203-3228, 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 11 specifications, cited from the U.S. Government catalog. The record lists 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-203-3228 |
| Primary Part Number | BACW10BP12ACU |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Boeing Defence Australia Ltd |
| 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 | 1.230 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Material Thickness | 0.073 INCHES MINIMUM AND 0.087 INCHES MAXIMUM IN |
| Specification/standard Data | 81205-BACW10BP MANUFACTURERS STANDARD |
| Recess Diameter | 0.895 INCHES MINIMUM AND 0.915 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | IRON ALLOY 660 OVERALL |
| Hole Diameter | 0.750 INCHES MINIMUM AND 0.761 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 |
|---|---|
| BACW10BP12ACU | Boeing Defence Australia Ltd (AUS) |
| BACW10BP12ACU | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| BACW10BP12ACU | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACW10BP12ACU | Component Products Corporation Dba Component Products Corp (USA) |
| BACW10BP12ACU | Moeller Manufacturing & Supply, Llc (USA) |
| BACW10BP12ACU | Anillo Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| BACW10BP12ACU | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-203-3228 is a Washer,recessed, manufactured by Boeing Defence Australia Ltd, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-203-3228 has 6 manufacturer part numbers on file: BACW10BP12ACU (Boeing Defence Australia Ltd), BACW10BP12ACU (Boeing Defence Australia Ltd Div Defense, Space & Security), BACW10BP12ACU (Sps Technologies, Llc Dba PB Fasteners), BACW10BP12ACU (Component Products Corporation Dba Component Products Corp), BACW10BP12ACU (Moeller Manufacturing & Supply, Llc) and 1 more.
1 possible match (shared part number, not a government interchangeability claim): 5310-01-669-7020. Verify interchangeability with system specifications before substitution.
Key specifications for BACW10BP12ACU: 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: 1.230 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN. 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.