The Standoff,threaded,spacing, cataloged under National Stock Number 5340-01-531-0604, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp. Government technical data includes 17 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-531-0604 |
| Primary Part Number | 3921C39H01 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| Status | ACTIVE |
| Smaller Groove Diameter | 0.248 INCHES NOMINAL IN |
| Length | 1.375 INCHES NOMINAL IN |
| Groove Diameter | 0.248 INCHES NOMINAL IN |
| Thread Length | 0.620 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Distance From End to Groove | 0.180 INCHES NOMINAL IN |
| Style Designator | GROOVED W/ LEFT INTERNAL AND RIGHT EXTERNAL THREAD |
| Diameter | 0.620 INCHES NOMINAL IN |
| Nominal Thread Size | 0.250 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) IN |
| Nominal Thread Size | 0.313 INCHES RIGHT EXTERNAL IN |
| Cross-Sectional Shape | ROUND |
| Thread Class | 2A RIGHT EXTERNAL A |
| Thread Class | 2B LEFT INTERNAL (INCLUDES THRU THREAD) |
| Thread Quantity Per Inch | 24 RIGHT EXTERNAL |
| Thread Quantity Per Inch | 28 LEFT INTERNAL (INCLUDES THRU THREAD) |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | UNF RIGHT EXTERNAL |
| Thread Series Designator | UNF LEFT INTERNAL (INCLUDES THRU THREAD) |
| 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 |
|---|---|
| 3921C39H01 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
NSN 5340-01-531-0604 is a Standoff,threaded,spacing, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-531-0604 has 1 manufacturer part number on file: 3921C39H01 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).
Key specifications for 3921C39H01: Smaller Groove Diameter: 0.248 INCHES NOMINAL IN; Length: 1.375 INCHES NOMINAL IN; Groove Diameter: 0.248 INCHES NOMINAL IN; Thread Length: 0.620 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN. 17 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.