The Insert,screw Thread, cataloged under National Stock Number 5325-01-646-2311, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-646-2311 |
| Item Name | Insert,screw Thread |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Width Across Flats | 0.322 INCHES NOMINAL IN |
| Length | 0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-PRF-46010 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Knurl Length | 0.105 INCHES NOMINAL IN |
| Thread Length | 0.455 INCHES NOMINAL IN |
| Material Document and Classification | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5734 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.4375 INCHES IN |
| Surface Treatment | LUBRICANT OVERALL |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| M45932/1-21DL | 2/2 Government specification standardization U.S. Government activity |
NSN 5325-01-646-2311 is a Insert,screw Thread, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-01-646-2311: Width Across Flats: 0.322 INCHES NOMINAL IN; Length: 0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-PRF-46010 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Knurl Length: 0.105 INCHES NOMINAL IN. 12 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.