The Nut,plain,round, cataloged under National Stock Number 5310-00-776-7668, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-776-7668 |
| Primary Part Number | 7767668 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-P-16232,TYPE M,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNS |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Thread Pitch Diameters | +3.8575 TO 3.8631 INCHES IN |
| Material Document and Classification | QQ-S-626 FED SPEC SINGLE MATERIAL RESPONSE OR SAE FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.125 INCHES NOMINAL NUT IN |
| Drive Point Width | 0.250 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 3.891 INCHES IN |
| Nut Diameter | 5.240 INCHES MINIMUM AND 5.260 INCHES MAXIMUM IN |
| Counterbore Diameter | 4.000 INCHES NOMINAL NUT IN |
| Drive Point Depth | 0.312 INCHES NOMINAL IN |
| Nut Thickness | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE MANGANESE OVERALL |
| Countersink Angle | 119.0 DEGREES MINIMUM AND 121.0 DEGREES MAXIMUM FIRST END |
| Countersink Angle | 119.0 DEGREES MINIMUM AND 121.0 DEGREES MAXIMUM SECOND END |
| Drive Point Quantity | 6 |
| Nut Style | ROUND |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 4140 OVERALL |
| 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 |
|---|---|
| 7767668 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 6760593 | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| 5310007767668 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 5310-00-776-7668 is a Nut,plain,round, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-776-7668 has 2 manufacturer part numbers on file: 7767668 (U S Army Tank Automotive Command Amsta-Im-Mm), 6760593 (General Motors Corp).
Key specifications for 7767668: Surface Treatment Document and Classification: MIL-P-16232,TYPE M,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNS; Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM; Thread Pitch Diameters: +3.8575 TO 3.8631 INCHES IN. 20 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.