The Screw,close Tolerance, cataloged under National Stock Number 5305-01-541-5249, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-541-5249 |
| Primary Part Number | TX1026C4-12AF |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.110 INCHES NOMINAL IN |
| Fastener Length | 1.160 INCHES MINIMUM AND 1.190 INCHES MAXIMUM IN |
| Thread Length | 0.425 INCHES NOMINAL IN |
| Spline Major Diameter | 0.221 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FILLISTER COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Grip Diameter | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM OVERALL |
| Internal Drive Style | TORX |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| 3M1169C4-12AF | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| TX1026C4-12AF PRIMARY | Hi-Shear Corporation (USA) |
| TX1026C4-12AF | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| 3M1169C4-12AF | Heartland Precision Fasteners Inc (USA) |
| TX1026C4-12AF PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M1169C4-12AF | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| WC1169C4-12AF | West Coast Aerospace, Inc. (USA) |
| TX1026C4-12AF PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GS1006C4-12AF | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M1169C4-12AF PRIMARY | The Boeing Company Div Defense (USA) |
| TX1026C4-12AF | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M1169C4-12AF | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| TX1026C4-12AF | Huck International, Inc (USA) |
| 11287C4-12AF | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1169C4-12AF | Houston Precision Fasteners I Lp (USA) |
| TX1026C4-12AF | Howmet Global Fastening Systems Inc (USA) |
| TX1026C4-12AF PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| TX1026C4-12AF | 5/9 Secondary reference Sps Technologies Inc |
| TX1026C4-12AF | 5/2 Secondary reference U.S. Government activity |
| TX1026C4-12AF | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-541-5249 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-541-5249 has 17 manufacturer part numbers on file: 3M1169C4-12AF (Fastener Innovation Technology, Inc. Dba F I T), TX1026C4-12AF (Hi-Shear Corporation), TX1026C4-12AF (Fairchild Fasteners Europe - Vsd Gmbh), 3M1169C4-12AF (Heartland Precision Fasteners Inc), TX1026C4-12AF (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 12 more.
Key specifications for TX1026C4-12AF: Head Height: 0.110 INCHES NOMINAL IN; Fastener Length: 1.160 INCHES MINIMUM AND 1.190 INCHES MAXIMUM IN; Thread Length: 0.425 INCHES NOMINAL IN; Spline Major Diameter: 0.221 INCHES NOMINAL IN. 16 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.