The Insert,screw Thread, cataloged under National Stock Number 5325-01-548-2516, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Avk Industries Products Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-548-2516 |
| Primary Part Number | AKS4-420-260 |
| Item Name | Insert,screw Thread |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Avk Industries Products Inc |
| Status | ACTIVE |
| Flange Diameter | 0.398 INCHES NOMINAL IN |
| Flange Thickness | 0.022 INCHES NOMINAL IN |
| Style Designator | SERRATED |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Surface Treatment | ZINC OVERALL |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 1008 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| AKS4-420-260 PRIMARY | Avk Industries Products Inc (USA) |
| Reference | Meaning |
|---|---|
| 12446871 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 5325-01-548-2516 is a Insert,screw Thread, manufactured by Avk Industries Products Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-548-2516 has 1 manufacturer part number on file: AKS4-420-260 (Avk Industries Products Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5325-01-570-8646, 5325-01-578-9754, 5325-01-628-5431. Verify interchangeability with system specifications before substitution.
Key specifications for AKS4-420-260: Flange Diameter: 0.398 INCHES NOMINAL IN; Flange Thickness: 0.022 INCHES NOMINAL IN; Style Designator: SERRATED; Thread Direction: RIGHT-HAND. 10 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.