The Standoff,threaded,spacing, cataloged under National Stock Number 5340-00-558-3288, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5340-00-558-3288 |
| Primary Part Number | 25418131 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| Width Across Flats | 0.188 INCHES NOMINAL IN |
| Length | 0.625 INCHES NOMINAL IN |
| Cross-Sectional Shape | HEXAGON |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 25418131 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 25418131 | 5/9 Secondary reference U.S. Government activity |
NSN 5340-00-558-3288 is a Standoff,threaded,spacing, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-558-3288 has 1 manufacturer part number on file: 25418131 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 25418131: Width Across Flats: 0.188 INCHES NOMINAL IN; Length: 0.625 INCHES NOMINAL IN; Cross-Sectional Shape: HEXAGON; Special Features: SIZE 4-40 UNC CL 2B THREADED FULL LENGTH. 5 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.