The Screw,close Tolerance, cataloged under National Stock Number 5305-01-494-4346, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 12 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-494-4346 |
| Primary Part Number | TX1026C6-21A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Spline Minor Diameter | 0.1885 INCHES MINIMUM AND 0.1925 INCHES MAXIMUM IN |
| Fastener Length | 1.8755 INCHES MINIMUM AND 1.9055 INCHES MAXIMUM IN |
| Thread Length | 0.578 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spline Major Diameter | 0.2640 INCHES MINIMUM AND 0.2680 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.303 INCHES MINIMUM AND 1.323 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | TORX |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | NICKEL ALLOY 718 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.7490 INCHES MINIMUM AND 0.7604 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| TX1026C6-21A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| TX1027C6-21A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| TX1026C6-21A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| TX1026C6-21A PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| TX1026C6-21A PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 11827C6-21A | Reid Products Inc. Dba Reid Products Inc (USA) |
| TX1026C-21A PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| TX1026C6-21A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M1169C6-21A PRIMARY | The Boeing Company Div Defense (USA) |
| TX1026C6-21A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M1169C-21A | The Boeing Company Div Defense (USA) |
| TX1026C6-21A PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| TX1026C6-21A | 3/2 Design control — primary reference U.S. Government activity |
| TX1026C6-21A | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-494-4346 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-494-4346 has 12 manufacturer part numbers on file: TX1026C6-21A (Howmet Global Fastening Systems Inc), TX1027C6-21A (Fairchild Fasteners Europe - Vsd Gmbh), TX1026C6-21A (Fairchild Fasteners Europe - Vsd Gmbh), TX1026C6-21A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), TX1026C6-21A (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 7 more.
Key specifications for TX1026C6-21A: Spline Minor Diameter: 0.1885 INCHES MINIMUM AND 0.1925 INCHES MAXIMUM IN; Fastener Length: 1.8755 INCHES MINIMUM AND 1.9055 INCHES MAXIMUM IN; Thread Length: 0.578 INCHES NOMINAL IN; Criticality Code Justification: AGAV. 19 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.