The Bolt,assembled Washer, cataloged under National Stock Number 5306-01-131-2902, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-131-2902 |
| Primary Part Number | 3M881V-4-4 |
| Item Name | Bolt,assembled Washer |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Fastener Length | 0.660 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE PRIMARY WASHER |
| Primary Washer Outside Diameter | 0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN |
| Thread Length | 0.400 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN |
| Material Document and Classification | NAS621 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Material Document and Classification | QQ-A-250/5,T3 OR T4 FED SPEC SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Primary Washer Style | FLAT |
| Thread Direction | RIGHT-HAND |
| Primary Washer Material Thickness | 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE OR CHROMATE PRIMARY WASHER |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | ALUMINUM ALLOY 2024 PRIMARY WASHER |
| Material | TITANIUM ALLOY FASTENER |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Washer Quantity | 1 |
| 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 |
|---|---|
| T981-4-4 | Huck International, Inc (USA) |
| D16175-12-4 | Huck International, Inc (USA) |
| SC2670-4-4 | Howmet Global Fastening Systems Inc (USA) |
| 3M881V-4-4 PRIMARY | The Boeing Company Div Defense (USA) |
| VDP0001-4 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| D16175-12-4 | 5/9 Secondary reference U.S. Government activity |
| T981-4-4 | 5/9 Secondary reference U.S. Government activity |
| 111026-4-4 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-131-2902 is a Bolt,assembled Washer, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-131-2902 has 5 manufacturer part numbers on file: T981-4-4 (Huck International, Inc), D16175-12-4 (Huck International, Inc), SC2670-4-4 (Howmet Global Fastening Systems Inc), 3M881V-4-4 (The Boeing Company Div Defense), VDP0001-4 (Valley-Todeco, Inc. Dba Arconic Fastening Systems).
Key specifications for 3M881V-4-4: Head Height: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Fastener Length: 0.660 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE PRIMARY WASHER; Primary Washer Outside Diameter: 0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN. 21 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.