The Standoff,threaded,spacing, cataloged under National Stock Number 5340-01-398-3597, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is L3harris Technologies Integrated Systems L.p. Dba L3harris Technologies. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-398-3597 |
| Primary Part Number | S10021-26 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | L3harris Technologies Integrated Systems L.p. Dba L3harris Technologies |
| Status | ACTIVE |
| Width Across Flats | 1.500 INCHES NOMINAL IN |
| Length | 0.188 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-Z-325C TYPE 1 CLASS 3 FED SPEC 1ST TREATMENT RESPONSE STANDOFF |
| Style Designator | PROJECTION ONE END W/ RIGHT EXTERNAL THREAD |
| Thread Direction | RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD) |
| Nominal Thread Size | 8.0 MILLIMETERS LEFT INTERNAL (INCLUDES THRU THREAD) MM |
| Cross-Sectional Shape | HEXAGON |
| Material | STEEL CORROSION RESISTING STANDOFF |
| Right Projection Diameter | 0.250 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD) |
| 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 |
|---|---|
| S10021-26 PRIMARY | L3harris Technologies Integrated Systems L.p. Dba L3harris Technologies (USA) |
| 9747-SS-0440-7 | Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware (USA) |
| Reference | Meaning |
|---|---|
| 9747-SS-0440-7 | 5/9 Secondary reference New Haven Mfg Corp Amatom Electronic Hardware Div |
NSN 5340-01-398-3597 is a Standoff,threaded,spacing, manufactured by L3harris Technologies Integrated Systems L.p. Dba L3harris Technologies, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-398-3597 has 2 manufacturer part numbers on file: S10021-26 (L3harris Technologies Integrated Systems L.p. Dba L3harris Technologies), 9747-SS-0440-7 (Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware).
Key specifications for S10021-26: Width Across Flats: 1.500 INCHES NOMINAL IN; Length: 0.188 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-Z-325C TYPE 1 CLASS 3 FED SPEC 1ST TREATMENT RESPONSE STANDOFF; Style Designator: PROJECTION ONE END W/ RIGHT EXTERNAL THREAD. 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.