The Nut,sleeve, cataloged under National Stock Number 5310-00-997-8856, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Penn Engineering & Manufacturing Corp. Government technical data includes 15 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-997-8856 |
| Primary Part Number | BS0S-0428-26 |
| Item Name | Nut,sleeve |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Penn Engineering & Manufacturing Corp |
| Status | ACTIVE |
| Flange Width Across Flats | 0.375 INCHES NOMINAL IN |
| Thread Series | UNF |
| Thread Length | 0.500 INCHES NOMINAL OVERALL IN |
| Material Document and Classification | FED STD 66,COMP 303 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Diameter | 0.342 INCHES MAXIMUM IN |
| Specification/standard Data | 46384-SOS428 MANUFACTURERS SPECIFICATION |
| Cross-Sectional Shape | HEXAGONAL FLANGE |
| Cross-Sectional Shape | ROUND NUT |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | SLEEVE |
| Thread Class | 2B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| BS0S-0428-26 PRIMARY | Penn Engineering & Manufacturing Corp (USA) |
| BL-8576 | Breeze-Eastern Llc (USA) |
NSN 5310-00-997-8856 is a Nut,sleeve, manufactured by Penn Engineering & Manufacturing Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-997-8856 has 2 manufacturer part numbers on file: BS0S-0428-26 (Penn Engineering & Manufacturing Corp), BL-8576 (Breeze-Eastern Llc).
Key specifications for BS0S-0428-26: Flange Width Across Flats: 0.375 INCHES NOMINAL IN; Thread Series: UNF; Thread Length: 0.500 INCHES NOMINAL OVERALL IN; Material Document and Classification: FED STD 66,COMP 303 FED STD SINGLE MATERIAL RESPONSE OVERALL. 15 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.