The Screw,close Tolerance, cataloged under National Stock Number 5305-01-494-3346, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-494-3346 |
| Primary Part Number | TX1026C6-18A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Spline Minor Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Fastener Length | 1.688 INCHES MINIMUM AND 1.718 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.578 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spline Major Diameter | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.3750 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM 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 | 0.7409 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 | X |
| Part Number | Manufacturer |
|---|---|
| 11827C6-18A | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1169C6-18A | Linread Northbridge (aircraft Product Division) (GBR) |
| TX1026C6-18A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| TX1026C6-18A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M1169C6-18A | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M1169C6-18A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M1169C6-18A | West Coast Aerospace, Inc. (USA) |
| 3M1169C6-18A | Huck International, Inc (USA) |
| TX1026C6-18A PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M1169C6-18A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M1169C6-18A | Saturn Fasteners Inc (USA) |
| 3M1169C6-18A | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| TX1026C6-18A PRIMARY | Hi-Shear Corporation (USA) |
| 3M1169C6-18A PRIMARY | The Boeing Company Div Defense (USA) |
| 3M1169C6-18A | Heartland Precision Fasteners Inc (USA) |
| 3M1169C6-18A | Linread Ltd (GBR) |
| GS1006C6-18A | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M1169C6-18A | Houston Precision Fasteners I Lp (USA) |
| TX1026C6-18A PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| TX1026C6-18A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| TX1026C6-18A | 3/2 Design control — primary reference U.S. Government activity |
| TX1026C6-18A | 5/9 Secondary reference Sps Technologies Inc |
| 3M1169C6-18A | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-494-3346 is a Screw,close Tolerance, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-494-3346 has 20 manufacturer part numbers on file: 11827C6-18A (Reid Products Inc. Dba Reid Products Inc), 3M1169C6-18A (Linread Northbridge (aircraft Product Division)), TX1026C6-18A (Fairchild Fasteners Europe - Vsd Gmbh), TX1026C6-18A (Sps Technologies, Llc Dba PB Fasteners), 3M1169C6-18A (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 15 more.
Key specifications for TX1026C6-18A: Spline Minor Diameter: 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN; Fastener Length: 1.688 INCHES MINIMUM AND 1.718 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-83488 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.578 INCHES NOMINAL IN. 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.