The Insert,screw Thread, cataloged under National Stock Number 5325-01-173-5658, 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 Microdot Products. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5325-01-173-5658 |
| Primary Part Number | K50726-4 |
| Item Name | Insert,screw Thread |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Microdot Products |
| Status | ACTIVE |
| Flange Diameter | 0.365 INCHES NOMINAL IN |
| Length | 0.490 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN |
| Flange Thickness | 0.080 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 1279M79P02 | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| K50726-4 PRIMARY | Howmet Global Fastening Systems Inc. Div Microdot Products (USA) |
| 9985M45P02 | General Electric Company (USA) |
| Reference | Meaning |
|---|---|
| K50726 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| 550726 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
| K50726 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
NSN 5325-01-173-5658 is a Insert,screw Thread, manufactured by Howmet Global Fastening Systems Inc. Div Microdot Products, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-173-5658 has 3 manufacturer part numbers on file: 1279M79P02 (Howmet Global Fastening Systems Inc. Div Tridair Products), K50726-4 (Howmet Global Fastening Systems Inc. Div Microdot Products), 9985M45P02 (General Electric Company).
1 possible match (shared part number, not a government interchangeability claim): 5325-01-255-6751. Verify interchangeability with system specifications before substitution.
Key specifications for K50726-4: Flange Diameter: 0.365 INCHES NOMINAL IN; Length: 0.490 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN; Flange Thickness: 0.080 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; End Item Identification: W/S: AIRCRAFT, F-16; ENGINE, F118-GE-100 (B-2 BOMBER); AIRCRAFT, B-2 BOMBER (ATB); U-2 ENGINE (F-118-GE-101); AIRCRAFT, B-1B; ENGINE, AIRCRAFT, F101-GE-102 (B-1); ENGINE, AIRCRAFT, F110-GE-100/129 (F-16 C/D). 4 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.