The Standoff,threaded,spacing, cataloged under National Stock Number 5340-01-399-3839, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-399-3839 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Thread Length | 1.060 INCHES MAXIMUM LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Diameter | 3.450 INCHES MINIMUM AND 3.510 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD) |
| Nominal Thread Size | 0.312 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Cross-Sectional Shape | ROUND |
| Thread Class | 2B LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Quantity Per Inch | 18 LEFT INTERNAL (INCLUDES THRU THREAD) |
| Material | STEEL COMP 1015 OR STEEL COMP 1025 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 |
| Reference | Meaning |
|---|---|
| 2342093 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-399-3839 is a Standoff,threaded,spacing, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-01-399-3839: Thread Length: 1.060 INCHES MAXIMUM LEFT INTERNAL (INCLUDES THRU THREAD) IN; Diameter: 3.450 INCHES MINIMUM AND 3.510 INCHES MAXIMUM IN; Thread Direction: RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD); Nominal Thread Size: 0.312 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN. 9 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.