The Insert,screw Thread, cataloged under National Stock Number 5325-01-053-2596, 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12 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-053-2596 |
| Item Name | Insert,screw Thread |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Length | 0.375 INCHES NOMINAL IN |
| Insert Size | 0.375-16 UNC 2A A |
| Style Designator | KEYLOCK |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Internal Thread Relief Depth | 0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| Features Provided | INDIVIDUALLY KEYED |
| Nominal Thread Size | 0.250 INCHES IN |
| Full Internal Thread Length | 0.295 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN |
| Thread Class | 2B |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 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 |
|---|---|
| 754/4/38386/002 | 5/1 Secondary reference Eaton Limited |
| KNL428JT | 5/1 Secondary reference Howmet Global Fastening Systems Inc. Div Tridair Products |
| MS51830CA202L | 2/2 Government specification standardization U.S. Government activity |
| NAS1394CA4L | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 423-603-9032 | 5/1 Secondary reference U.S. Government activity |
| K9001-4 | 5/9 Secondary reference Kaynar Microdot Aerospace |
| K9001-4 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
NSN 5325-01-053-2596 is a Insert,screw Thread, classified under FSC 5325, Fastening Devices. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5325-01-497-4177. Verify interchangeability with system specifications before substitution.
Key specifications for 5325-01-053-2596: Length: 0.375 INCHES NOMINAL IN; Insert Size: 0.375-16 UNC 2A A; Style Designator: KEYLOCK; Material Document and Classification: AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.