The Nut,plain,round, cataloged under National Stock Number 5310-01-139-6495, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. 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 | 5310-01-139-6495 |
| Primary Part Number | 639AS516-1 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Thread Series | UNS |
| Material Document and Classification | QQ-M-31 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.061 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Diameter | 0.356 INCHES MINIMUM AND 0.362 INCHES MAXIMUM IN |
| Drive Point Depth | 0.034 INCHES NOMINAL IN |
| Nut Thickness | 0.081 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN |
| Countersink Angle | 85.0 DEGREES MINIMUM AND 90.0 DEGREES MAXIMUM OVERALL |
| Drive Point Quantity | 2 |
| Nut Style | ROUND |
| Thread Class | 2B |
| Thread Quantity Per Inch | 64 |
| Material | MAGNESIUM ALLOY AZ31B 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 |
|---|---|
| 639AS516-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
NSN 5310-01-139-6495 is a Nut,plain,round, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-139-6495 has 1 manufacturer part number on file: 639AS516-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 639AS516-1: Thread Series: UNS; Material Document and Classification: QQ-M-31 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Drive Point Width: 0.061 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN; Thread Direction: RIGHT-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.