The Standoff,threaded,spacing, cataloged under National Stock Number 5340-01-168-3181, 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9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-168-3181 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Width Across Flats | 0.500 INCHES NOMINAL IN |
| Length | 1.020 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-5541, CLASS 1A MIL SPEC 1ST TREATMENT RESPONSE OVERALL A |
| Thread Length | 0.300 INCHES MINIMUM RIGHT INTERNAL IN |
| Thread Length | 0.400 INCHES MINIMUM LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Material Document and Classification | QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape | HEXAGON |
| Surface Treatment | CHROMATE OVERALL |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| 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 |
|---|---|
| 67B4577 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-168-3181 is a Standoff,threaded,spacing, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-01-168-3181: Width Across Flats: 0.500 INCHES NOMINAL IN; Length: 1.020 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-5541, CLASS 1A MIL SPEC 1ST TREATMENT RESPONSE OVERALL A; Thread Length: 0.300 INCHES MINIMUM RIGHT INTERNAL 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.