The Standoff,threaded,spacing, cataloged under National Stock Number 5340-01-458-3128, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Honeywell Intl Inc Defense Avionics Systems Former Test Systems Div. Government technical data includes 20 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 | 5340-01-458-3128 |
| Primary Part Number | 1944684-146 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Honeywell Intl Inc Defense Avionics Systems Former Test Systems Div |
| Status | ACTIVE |
| Width Across Flats | 0.312 INCHES NOMINAL IN |
| Length | 1.999 INCHES MINIMUM AND 2.001 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-5541 CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.500 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Thread Length | 0.500 INCHES NOMINAL RIGHT INTERNAL IN |
| Style Designator | LEFT INTERNAL AND RIGHT INTERNAL THREADS |
| Material Document and Classification | QQ-A-225/6 TEMP T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Direction | RIGHT-HAND RIGHT INTERNAL |
| Nominal Thread Size | 0.164 INCHES RIGHT INTERNAL IN |
| Nominal Thread Size | 0.164 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Cross-Sectional Shape | HEXAGON |
| Surface Treatment | OXIDE FILM OVERALL |
| Thread Class | 3B LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Class | 3B RIGHT INTERNAL |
| Thread Quantity Per Inch | 32 RIGHT INTERNAL |
| Thread Quantity Per Inch | 32 LEFT INTERNAL (INCLUDES THRU THREAD) |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) 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 |
|---|---|
| 1944684-146 PRIMARY | Honeywell Intl Inc Defense Avionics Systems Former Test Systems Div (USA) |
NSN 5340-01-458-3128 is a Standoff,threaded,spacing, manufactured by Honeywell Intl Inc Defense Avionics Systems Former Test Systems Div, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-458-3128 has 1 manufacturer part number on file: 1944684-146 (Honeywell Intl Inc Defense Avionics Systems Former Test Systems Div).
Key specifications for 1944684-146: Width Across Flats: 0.312 INCHES NOMINAL IN; Length: 1.999 INCHES MINIMUM AND 2.001 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-5541 CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.500 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN. 20 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.