The Washer,finishing, cataloged under National Stock Number 5310-01-129-7620, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-129-7620 |
| Primary Part Number | 4M264-2 |
| Item Name | Washer,finishing |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Style Designator | FINISHING |
| Material Document and Classification | MIL-T-9047,COMP 6-6A1-4V MIL SPEC SINGLE MATERIAL RESPONSE OVERALL V |
| Outside Diameter | 0.897 INCHES MINIMUM AND 0.907 INCHES MAXIMUM IN |
| Material Thickness | 0.020 INCHES NOMINAL IN |
| Recess Diameter | 0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN |
| Material | TITANIUM ALLOY OVERALL |
| Hole Diameter | 0.312 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN |
| Recess Angle | 100.0 DEGREES NOMINAL |
| 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 |
|---|---|
| 4M264-2 PRIMARY | The Boeing Company Div Defense (USA) |
| 4M264-2 | Trico Manufacturing Inc. (USA) |
| Reference | Meaning |
|---|---|
| 4M264-2 | 5/9 Secondary reference Ford Motor Co Ford Parts and Service Div Government Part Sales |
| 4M264-2 | C/1 Advisory reference — outside the item-of-supply concept Ford Motor Company |
NSN 5310-01-129-7620 is a Washer,finishing, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-129-7620 has 2 manufacturer part numbers on file: 4M264-2 (The Boeing Company Div Defense), 4M264-2 (Trico Manufacturing Inc.).
Key specifications for 4M264-2: Overall Height: 0.248 INCHES NOMINAL IN; Style Designator: FINISHING; Material Document and Classification: MIL-T-9047,COMP 6-6A1-4V MIL SPEC SINGLE MATERIAL RESPONSE OVERALL V; Outside Diameter: 0.897 INCHES MINIMUM AND 0.907 INCHES MAXIMUM IN. 8 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.