The Standoff,threaded,spacing, cataloged under National Stock Number 5340-00-398-1971, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Bae Systems Information and Electronic Systems Integration Inc.. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-00-398-1971 |
| Primary Part Number | A653-55 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Bae Systems Information and Electronic Systems Integration Inc. |
| Status | ACTIVE |
| Length | 1.950 INCHES NOMINAL IN |
| Groove Diameter | 0.430 INCHES NOMINAL IN |
| Thread Length | 0.460 INCHES NOMINAL RIGHT EXTERNAL IN |
| Style Designator | PROJECTION ONE END W/ RIGHT EXTERNAL THREAD |
| Diameter | 0.562 INCHES NOMINAL IN |
| Cross-Sectional Shape | ROUND |
| Material | STEEL CORROSION RESISTING OVERALL |
| Groove Width | 0.094 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 |
| Part Number | Manufacturer |
|---|---|
| A653-55 PRIMARY | Bae Systems Information and Electronic Systems Integration Inc. (USA) |
| Reference | Meaning |
|---|---|
| 506-4204-002 | 5/9 Secondary reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
NSN 5340-00-398-1971 is a Standoff,threaded,spacing, manufactured by Bae Systems Information and Electronic Systems Integration Inc., classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-398-1971 has 1 manufacturer part number on file: A653-55 (Bae Systems Information and Electronic Systems Integration Inc.).
Key specifications for A653-55: Length: 1.950 INCHES NOMINAL IN; Groove Diameter: 0.430 INCHES NOMINAL IN; Thread Length: 0.460 INCHES NOMINAL RIGHT EXTERNAL IN; Style Designator: PROJECTION ONE END W/ RIGHT EXTERNAL THREAD. 8 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.