The Insert,screw Thread, cataloged under National Stock Number 5325-00-441-9424, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Rolls-Royce Corporation. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-441-9424 |
| Primary Part Number | 6840421-1 |
| Item Name | Insert,screw Thread |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| Flange Diameter | 0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Length | 0.355 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Flange Thickness | 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN |
| Insert Size | 0.312-24 NS 0.2876 IN MIN 0.2888 IN MAX PITCH DIA IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 6840421-1 PRIMARY | Rolls-Royce Corporation (USA) |
| Reference | Meaning |
|---|---|
| 6840421-1 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
NSN 5325-00-441-9424 is a Insert,screw Thread, manufactured by Rolls-Royce Corporation, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-441-9424 has 1 manufacturer part number on file: 6840421-1 (Rolls-Royce Corporation).
Key specifications for 6840421-1: Flange Diameter: 0.540 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN; Length: 0.355 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Flange Thickness: 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN; Insert Size: 0.312-24 NS 0.2876 IN MIN 0.2888 IN MAX PITCH DIA IN. 6 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.