The Standoff,threaded,snap-in, cataloged under National Stock Number 5340-01-486-1099, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec. Government technical data includes 7 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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-486-1099 |
| Primary Part Number | RD54658-1 |
| Item Name | Standoff,threaded,snap-in |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec |
| Status | ACTIVE |
| Thread Length | 0.500 INCHES NOMINAL RIGHT INTERNAL IN |
| Thread Direction | RIGHT-HAND RIGHT INTERNAL |
| Nominal Thread Size | 0.500 INCHES RIGHT INTERNAL IN |
| Thread Class | 3A RIGHT INTERNAL A |
| Thread Quantity Per Inch | 28 RIGHT INTERNAL |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNEF RIGHT INTERNAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| RD54658-1 PRIMARY | Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec (USA) |
NSN 5340-01-486-1099 is a Standoff,threaded,snap-in, manufactured by Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-486-1099 has 1 manufacturer part number on file: RD54658-1 (Hydro-Aire Aerospace Corp. Dba Lear Romec Div Lear Romec).
Key specifications for RD54658-1: Thread Length: 0.500 INCHES NOMINAL RIGHT INTERNAL IN; Thread Direction: RIGHT-HAND RIGHT INTERNAL; Nominal Thread Size: 0.500 INCHES RIGHT INTERNAL IN; Thread Class: 3A RIGHT INTERNAL A. 7 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.