The Nut,plain,slotted,hexagon, cataloged under National Stock Number 5310-01-138-5507, 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 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-138-5507 |
| Primary Part Number | 8668790 |
| Item Name | Nut,plain,slotted,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Width Across Flats | 0.736 INCHES MINIMUM AND 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM0.750 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNFUNF |
| Nut Counterbore Depth | 0.011 INCHES MINIMUM AND 0.011 INCHES MINIMUM AND 0.021 INCHES MAXIMUM FIRST END0.021 INCHES MAXIMUM FIRST END IN |
| Thread Direction | RIGHT-HANDRIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES0.500 INCHES IN |
| Counterbore Diameter | 0.625 INCHES NOMINAL FIRST END0.625 INCHES NOMINAL FIRST END IN |
| Nut Height | 0.301 INCHES MINIMUM AND 0.301 INCHES MINIMUM AND 0.323 INCHES MAXIMUM0.323 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CADMIUM AND CHROMATE OVERALLCHROMATE OVERALL |
| Nut Style | SLOTTED, HEXAGONSLOTTED, HEXAGON |
| Thread Class | 2B2B |
| Thread Quantity Per Inch | 2020 |
| Material | STEEL COMP 1211 OR STEEL COMP 1212 OR STEEL COMP 1213 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OVERALL |
| Bearing Surface Type | FLATFLAT |
| 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 |
|---|---|
| 8668790 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5310-01-138-5507 is a Nut,plain,slotted,hexagon, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-138-5507 has 1 manufacturer part number on file: 8668790 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8668790: Width Across Flats: 0.736 INCHES MINIMUM AND 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM0.750 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNFUNF; Nut Counterbore Depth: 0.011 INCHES MINIMUM AND 0.011 INCHES MINIMUM AND 0.021 INCHES MAXIMUM FIRST END0.021 INCHES MAXIMUM FIRST END 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.