The Standoff,threaded,spacing, cataloged under National Stock Number 5340-01-575-3428, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Screws Unlimited Inc. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-575-3428 |
| Primary Part Number | 0440-8399-S1 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Screws Unlimited Inc |
| Status | ACTIVE |
| Width Across Flats | 0.312 INCHES NOMINAL IN |
| Length | 1.000 INCHES NOMINAL IN |
| Style Designator | LEFT INTERNAL THREAD |
| Material Document and Classification | QQ-S-763A CLASS 7 TYPE A 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL A |
| Thread Direction | RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD) |
| Nominal Thread Size | 0.112 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Cross-Sectional Shape | HEXAGON |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Quantity Per Inch | 40 LEFT INTERNAL (INCLUDES THRU THREAD) |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD) |
| 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 |
|---|---|
| 0440-8399-S1 PRIMARY | Screws Unlimited Inc (USA) |
| Reference | Meaning |
|---|---|
| 2135102G012 | 7/2 Vendor item drawing reference L3harris Technologies, Inc. |
NSN 5340-01-575-3428 is a Standoff,threaded,spacing, manufactured by Screws Unlimited Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-575-3428 has 1 manufacturer part number on file: 0440-8399-S1 (Screws Unlimited Inc).
Key specifications for 0440-8399-S1: Width Across Flats: 0.312 INCHES NOMINAL IN; Length: 1.000 INCHES NOMINAL IN; Style Designator: LEFT INTERNAL THREAD; Material Document and Classification: QQ-S-763A CLASS 7 TYPE A 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL A. 11 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.