The Nut,plain,plate, cataloged under National Stock Number 5310-01-024-1858, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-024-1858 |
| Primary Part Number | ST3M668-5M |
| Item Name | Nut,plain,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Plate Thickness | 0.080 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS 5667 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Nut Height | 0.265 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Countersink Angle | 110.0 DEGREES NOMINAL NUT |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | NICKEL ALLOY X-750 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 |
|---|---|
| ST3M668-5M PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M668-5M | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| NS103905E2-054 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-024-1858 is a Nut,plain,plate, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-024-1858 has 2 manufacturer part numbers on file: ST3M668-5M (The Boeing Company Div Defense), ST3M668-5M (Howmet Global Fastening Systems Inc).
Key specifications for ST3M668-5M: Plate Thickness: 0.080 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Material Document and Classification: AMS 5667 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND. 11 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.