The Screw,close Tolerance, cataloged under National Stock Number 5305-01-512-8319, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-512-8319 |
| Primary Part Number | TX1027C4-10AF |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Point Diameter | 0.425 INCHES NOMINAL IN |
| Fastener Length | 1.035 INCHES MINIMUM AND 1.065 INCHES MAXIMUM IN |
| Thread Length | 0.420 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN |
| 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 | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN |
| Grip Diameter | 0.249 INCHES NOMINAL IN |
| Internal Drive Style | TORX |
| Countersink Angle | 0.1 DEGREES MINIMUM AND 0.1 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 | 0.385 INCHES MINIMUM AND 0.394 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 |
|---|---|
| 3M1170C4-10AF | The Boeing Company Div Defense (USA) |
| 11825C4-10AF | Reid Products Inc. Dba Reid Products Inc (USA) |
| TX1027C4-10AF PRIMARY | Huck International, Inc (USA) |
| 3M1170C4-10AF | Houston Precision Fasteners I Lp (USA) |
| 3M1170C4-10AF PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| WC1170C4-10AF | West Coast Aerospace, Inc. (USA) |
| TX1027C4-10AF PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M1170C4-10AF PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M1170C4-10AF | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| TX1027C4-10AF | Howmet Global Fastening Systems Inc (USA) |
| TX1027C4-10AF PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| TX1027C4-10AF PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TX1027C4-10AF | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| 11845C4-10AF PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1170C4-10AF PRIMARY | Saturn Fasteners Inc (USA) |
| GS1014C4-10AF PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M1170C4-10AF PRIMARY | Heartland Precision Fasteners Inc (USA) |
| TX1027C4-10AF PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| TX1027C4-10AF | 3/2 Design control — primary reference U.S. Government activity |
| TX1027C4-10AF | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-512-8319 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-512-8319 has 18 manufacturer part numbers on file: 3M1170C4-10AF (The Boeing Company Div Defense), 11825C4-10AF (Reid Products Inc. Dba Reid Products Inc), TX1027C4-10AF (Huck International, Inc), 3M1170C4-10AF (Houston Precision Fasteners I Lp), 3M1170C4-10AF (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 13 more.
Key specifications for TX1027C4-10AF: Point Diameter: 0.425 INCHES NOMINAL IN; Fastener Length: 1.035 INCHES MINIMUM AND 1.065 INCHES MAXIMUM IN; Thread Length: 0.420 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN; Spline Major Diameter: 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN. 17 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.