The Washer,finishing, cataloged under National Stock Number 5310-01-266-4061, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-266-4061 |
| Primary Part Number | 4M335-6 |
| Item Name | Washer,finishing |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | FINISHING |
| Material Document and Classification | MIL-S-5059,COND A MIL SPEC 1ST MATERIAL RESPONSE OR QQ-S-766,COND A FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.720 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN |
| Material Thickness | 0.016 INCHES NOMINAL IN |
| Recess Diameter | 0.507 INCHES MINIMUM AND 0.517 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 302 OR STEEL COMP 304 OVERALL |
| Hole Diameter | 0.390 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN |
| Recess Angle | 99.0 DEGREES MINIMUM AND 100.3 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 |
|---|---|
| 4M335-6 | The Boeing Company Div Services (USA) |
| 4M335-6 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| T4M335-6 | 5/9 Secondary reference Trico Manufacturing Inc. |
| 4M335-6 | 5/9 Secondary reference Fabrication Specialty Inc Dba Fabrication Specialty Inc |
NSN 5310-01-266-4061 is a Washer,finishing, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-266-4061 has 2 manufacturer part numbers on file: 4M335-6 (The Boeing Company Div Services), 4M335-6 (The Boeing Company Div Defense).
Key specifications for 4M335-6: Overall Height: 0.059 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: FINISHING; Material Document and Classification: MIL-S-5059,COND A MIL SPEC 1ST MATERIAL RESPONSE OR QQ-S-766,COND A FED SPEC 2ND MATERIAL RESPONSE OVERALL. 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.