The Standoff,threaded,spacing, cataloged under National Stock Number 5340-01-478-8839, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-478-8839 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Length | 1.313 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OVERALL |
| Cross-Sectional Width | 0.313 INCHES MAXIMUM IN |
| Thread Length | 0.438 INCHES MINIMUM AND 0.440 INCHES MAXIMUM LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Style Designator | LEFT INTERNAL AND RIGHT INTERNAL THREADS |
| Material Document and Classification | AST-303,CONDITIONA ASSN STD 1ST MATERIAL RESPONSE OVERALL |
| Cross-Sectional Length | 1.3125 INCHES MINIMUM AND 1.3130 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD) |
| Cross-Sectional Shape | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 28 LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Quantity Per Inch | 32 LEFT INTERNAL (INCLUDES THRU THREAD) |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNF RIGHT EXTERNAL |
| Thread Series Designator | UNF 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 |
|---|---|
| NAS1831C5D21 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1831 | 3/1 Design control — primary reference U.S. Government activity |
NSN 5340-01-478-8839 is a Standoff,threaded,spacing, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-01-478-8839: Length: 1.313 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OVERALL; Cross-Sectional Width: 0.313 INCHES MAXIMUM IN; Thread Length: 0.438 INCHES MINIMUM AND 0.440 INCHES MAXIMUM LEFT INTERNAL (INCLUDES THRU THREAD) IN. 15 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.