The Insert,screw Thread, cataloged under National Stock Number 5325-01-253-4551, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Penn Engineering & Manufacturing Corp. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5325-01-253-4551 |
| Primary Part Number | KFB3-440-10ET |
| Item Name | Insert,screw Thread |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Penn Engineering & Manufacturing Corp |
| Status | ACTIVE |
| Length | 0.402 INCHES NOMINAL IN |
| Insert Size | 0.220 IN. DIA IN |
| Style Designator | BLIND |
| Nominal Thread Size | 0.112 INCHES IN |
| Thread Quantity Per Inch | 40 |
| Material | COPPER ALLOY 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 |
|---|---|
| KFB3-440-10ET PRIMARY | Penn Engineering & Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| 751723-1-10 | 7/2 Vendor item drawing reference U.S. Government activity |
| 29204-2 | 7/2 Vendor item drawing reference Smiths Aerospace, Inc., Electronic Systems-Grand Rapids |
NSN 5325-01-253-4551 is a Insert,screw Thread, manufactured by Penn Engineering & Manufacturing Corp, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-253-4551 has 1 manufacturer part number on file: KFB3-440-10ET (Penn Engineering & Manufacturing Corp).
Key specifications for KFB3-440-10ET: Length: 0.402 INCHES NOMINAL IN; Insert Size: 0.220 IN. DIA IN; Style Designator: BLIND; Nominal Thread Size: 0.112 INCHES IN. 7 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.