The Screw,close Tolerance, cataloged under National Stock Number 5305-01-490-6858, 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 19 specifications, cited from the U.S. Government catalog. The record lists 15 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-490-6858 |
| Primary Part Number | TX1026C4-13A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Point Diameter | 0.425 INCHES NOMINAL IN |
| Fastener Length | 1.222 INCHES MINIMUM AND 1.252 INCHES MAXIMUM IN |
| Thread Length | 0.420 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spline Major Diameter | 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Grip Length | 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN |
| Grip Diameter | 0.249 INCHES NOMINAL 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 | 28 |
| Material | NICKEL ALLOY 718 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.497 INCHES MINIMUM AND 0.506 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 | X |
| Part Number | Manufacturer |
|---|---|
| TX1026C4-13A PRIMARY | Hi-Shear Corporation (USA) |
| TX1026C4-13A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| GS1006C4-13A | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| TX1026C4-13A PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| TX1026C4-13A PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| TX1026C4-13A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 11827C4-13A | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1169C4-13A | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M1169C4-13A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| TX1026C4-13A | Huck International, Inc (USA) |
| WC1169C4-13A | West Coast Aerospace, Inc. (USA) |
| 3M1169C4-13A | Houston Precision Fasteners I Lp (USA) |
| 3M1169C4-13A | Heartland Precision Fasteners Inc (USA) |
| 3M1169C4-13A | The Boeing Company Div Defense (USA) |
| TX1026C4-13A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| TX1026C4-13A | 5/9 Secondary reference Sps Technologies Inc |
| TX1026C4-13A | 5/2 Secondary reference U.S. Government activity |
| TX1026C4-13A | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| TX1026C4-13A | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-490-6858 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-490-6858 has 15 manufacturer part numbers on file: TX1026C4-13A (Hi-Shear Corporation), TX1026C4-13A (Fairchild Fasteners Europe - Vsd Gmbh), GS1006C4-13A (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), TX1026C4-13A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), TX1026C4-13A (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 10 more.
Key specifications for TX1026C4-13A: Point Diameter: 0.425 INCHES NOMINAL IN; Fastener Length: 1.222 INCHES MINIMUM AND 1.252 INCHES MAXIMUM IN; Thread Length: 0.420 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN; Material Document and Classification: AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.