The Standoff,threaded,spacing, cataloged under National Stock Number 5340-01-110-9012, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Smiths Aerospace, Inc., Electronic Systems-Grand Rapids. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5340-01-110-9012 |
| Primary Part Number | 21355 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Smiths Aerospace, Inc., Electronic Systems-Grand Rapids |
| Status | ACTIVE |
| Flange Diameter | 0.355 INCHES MINIMUM AND 0.365 INCHES MAXIMUM IN |
| Length | 0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN |
| Flange Thickness | 0.145 INCHES NOMINAL IN |
| Style Designator | FLANGED |
| Diameter | 0.312 INCHES NOMINAL IN |
| Cross-Sectional Shape | ROUND |
| 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 |
|---|---|
| 21355 PRIMARY | Smiths Aerospace, Inc., Electronic Systems-Grand Rapids (USA) |
| Reference | Meaning |
|---|---|
| 21355D | 5/9 Secondary reference Smiths Aerospace, Inc., Electronic Systems-Grand Rapids |
NSN 5340-01-110-9012 is a Standoff,threaded,spacing, manufactured by Smiths Aerospace, Inc., Electronic Systems-Grand Rapids, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-110-9012 has 1 manufacturer part number on file: 21355 (Smiths Aerospace, Inc., Electronic Systems-Grand Rapids).
1 possible match (shared part number, not a government interchangeability claim): 5315-01-628-6992. Verify interchangeability with system specifications before substitution.
Key specifications for 21355: Flange Diameter: 0.355 INCHES MINIMUM AND 0.365 INCHES MAXIMUM IN; Length: 0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN; Flange Thickness: 0.145 INCHES NOMINAL IN; Style Designator: FLANGED. 6 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.