The Washer,flat, cataloged under National Stock Number 5310-00-936-0422, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-936-0422 |
| Primary Part Number | 547279 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 63.0 MICROINCHES TOP |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Heat Treatment | AS FABRICATED |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | 66 FED STD 1ST MATERIAL RESPONSE OR AMS 6350 ASSN STD 1ST MATERIAL RESPONSE AND 66 FED STD 2ND MATERIAL RESPONSE OR AMS 6355 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 4130 OR STEEL COMP 8630 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.276 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN |
| Thickness | 0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 547279 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 547279 | Tokyo Judoi Kogyo K.k. (JPN) |
| 547279 | Rogerson Kratos (USA) |
| Reference | Meaning |
|---|---|
| 547279 | C/1 Advisory reference — outside the item-of-supply concept Nielsen Hardware Corporation |
| 547279 | 5/9 Secondary reference U.S. Government activity |
| 547279 | 5/9 Secondary reference Tokyo Judogi Kogyo Co. |
NSN 5310-00-936-0422 is a Washer,flat, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-936-0422 has 3 manufacturer part numbers on file: 547279 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 547279 (Tokyo Judoi Kogyo K.k.), 547279 (Rogerson Kratos).
Key specifications for 547279: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES TOP; Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN. 14 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.