The Insert,screw Thread, cataloged under National Stock Number 5325-01-333-0270, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Div Tridair Products. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-333-0270 |
| Primary Part Number | KNKD428JSDFL |
| Item Name | Insert,screw Thread |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Tridair Products |
| Status | ACTIVE |
| Length | 0.385 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Insert Size | 0.500-20 UNF 2A A |
| Style Designator | KEYLOCK |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Internal Thread Relief Depth | 0.140 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| Features Provided | INDIVIDUALLY KEYED |
| Nominal Thread Size | 0.250 INCHES IN |
| Full Internal Thread Length | 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| KNKD428JSDFL PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| 868200-0005 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| 868200-0005 | 5/9 Secondary reference Litton Systems Inc. Div Navigation Systems Division |
NSN 5325-01-333-0270 is a Insert,screw Thread, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-333-0270 has 1 manufacturer part number on file: KNKD428JSDFL (Howmet Global Fastening Systems Inc. Div Tridair Products).
Key specifications for KNKD428JSDFL: Length: 0.385 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Insert Size: 0.500-20 UNF 2A A; Style Designator: KEYLOCK. 14 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.