The Standoff,threaded,snap-in, cataloged under National Stock Number 5340-01-491-5391, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-491-5391 |
| Primary Part Number | 178-4732 |
| Item Name | Standoff,threaded,snap-in |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Length | 0.630 INCHES NOMINAL IN |
| Thread Length | 0.210 INCHES NOMINAL RIGHT EXTERNAL IN |
| Style Designator | PROJECTION ONE END W/ RIGHT EXTERNAL THREAD |
| Thread Direction | RIGHT-HAND RIGHT EXTERNAL |
| Nominal Thread Size | 0.112 INCHES RIGHT EXTERNAL IN |
| Thread Class | 2A RIGHT EXTERNAL A |
| Thread Quantity Per Inch | 40 RIGHT EXTERNAL |
| Material | STEEL OVERALL |
| Right Projection Diameter | 0.082 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) RIGHT EXTERNAL |
| Right Projection Length | 0.250 INCHES NOMINAL IN |
| 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 |
|---|---|
| 178-4732 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 189-0494 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-491-5391 is a Standoff,threaded,snap-in, manufactured by The Boeing Company Div Defense, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-491-5391 has 1 manufacturer part number on file: 178-4732 (The Boeing Company Div Defense).
Key specifications for 178-4732: Length: 0.630 INCHES NOMINAL IN; Thread Length: 0.210 INCHES NOMINAL RIGHT EXTERNAL IN; Style Designator: PROJECTION ONE END W/ RIGHT EXTERNAL THREAD; Thread Direction: RIGHT-HAND RIGHT EXTERNAL. 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.