The Nut,plain,round, cataloged under National Stock Number 5310-00-649-8226, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-649-8226 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | BPS FW4007,FSCM 97499 MFR REF SINGLE TREATMENT RESPONSE OR QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT THREADS |
| Thread Series | UN |
| Material Document and Classification | QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OR AMS6371 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 4.280 INCHES MINIMUM AND 4.290 INCHES MAXIMUM NUT IN |
| Thread Direction | LEFT-HAND |
| Nominal Thread Size | 4.250 INCHES IN |
| Nut Diameter | 4.4985 INCHES MINIMUM AND 4.5015 INCHES MAXIMUM IN |
| Counterbore Diameter | 0.430 INCHES NOMINAL NUT IN |
| Drive Point Depth | 0.1042 INCHES MINIMUM AND 0.1107 INCHES MAXIMUM IN |
| Nut Thickness | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Drive Point Diameter | 0.338 INCHES MINIMUM AND 0.345 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OR CADMIUM OVERALL EXCEPT THREADS |
| Drive Point Quantity | 18 |
| Nut Style | ROUND |
| Thread Class | 2B |
| Test Data Document | 81349-MIL-I-6868 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). AND 97499-BPS 4075 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 416 OR STEEL COMP 4130 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Reference | Meaning |
|---|---|
| 204-010-420-1 | 7/2 Vendor item drawing reference U.S. Government activity |
| 204-010-420-1 | 3/2 Design control — primary reference U.S. Government activity |
| 204-010-420-001 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-649-8226 is a Nut,plain,round, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-649-8226: Surface Treatment Document and Classification: BPS FW4007,FSCM 97499 MFR REF SINGLE TREATMENT RESPONSE OR QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT THREADS; Thread Series: UN; Material Document and Classification: QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OR AMS6371 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nut Counterbore Depth: 4.280 INCHES MINIMUM AND 4.290 INCHES MAXIMUM NUT IN. 18 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.