The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-009-8325, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bsi Standards Limited. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-009-8325 |
| Primary Part Number | A50B |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bsi Standards Limited |
| Status | ACTIVE |
| Width Across Flats | 0.250 INCHES NOMINAL IN |
| Thread Series | UNF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.138 INCHES IN |
| Nut Height | 0.099 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 40 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Bearing Surface Type | FLAT |
| 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 |
|---|---|
| A50B | Bsi Standards Limited (GBR) |
| Reference | Meaning |
|---|---|
| 79800170020 | C/1 Advisory reference — outside the item-of-supply concept Goodrich Actuation Systems Ltd |
| 79800170020 | 3/9 Design control — primary reference Lucas Aerospace Ltd (electronic Systems & Equipment Div) |
NSN 5310-00-009-8325 is a Nut,plain,hexagon, manufactured by Bsi Standards Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-009-8325 has 1 manufacturer part number on file: A50B (Bsi Standards Limited).
Key specifications for A50B: Width Across Flats: 0.250 INCHES NOMINAL IN; Thread Series: UNF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.138 INCHES IN. 10 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.