The Nut,plain,round, cataloged under National Stock Number 5310-00-333-7558, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-333-7558 |
| Primary Part Number | 8332921 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Thread Series | UNS |
| Thread Pitch Diameters | +2.5049 TO 2.5103 INCHES IN |
| Drive Point Width | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Thread Direction | LEFT-HAND |
| Nominal Thread Size | 2.559 INCHES IN |
| Nut Diameter | 4.240 INCHES MINIMUM AND 4.260 INCHES MAXIMUM IN |
| Drive Point Depth | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Undercut Thickness | 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Nut Thickness | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Small End Diameter | 2.680 INCHES MINIMUM AND 2.700 INCHES MAXIMUM IN |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Quantity Per Inch | 12 |
| Material | STEEL 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 |
|---|---|
| 8332921 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 21AX657 | 5/9 Secondary reference Mack Trucks Inc Parts Opn |
NSN 5310-00-333-7558 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 5310-00-333-7558 has 1 manufacturer part number on file: 8332921 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8332921: Thread Series: UNS; Thread Pitch Diameters: +2.5049 TO 2.5103 INCHES IN; Drive Point Width: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN; Thread Direction: LEFT-HAND. 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.