The Screw,close Tolerance, cataloged under National Stock Number 5305-01-509-8087, 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 19 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-509-8087 |
| Primary Part Number | TX1027C4-5A |
| 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 | 0.722 INCHES MINIMUM AND 0.752 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 | 0.302 INCHES MINIMUM AND 0.322 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 | 0.385 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 |
|---|---|
| TX1027C4-5A PRIMARY | Hi-Shear Corporation (USA) |
| TX1027C4-5A PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M1170C4-5A PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 3M1170C4-5A PRIMARY | Saturn Fasteners Inc (USA) |
| 11845C4-5A PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| TX1027C4-5A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| TX1027C4-5A PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M1170C4-5A PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| TX1027C4-5A | Howmet Global Fastening Systems Inc (USA) |
| TX1027C4-5A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M1170C4-5A | Houston Precision Fasteners I Lp (USA) |
| GS1014C4-5A PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M1170C4-5A PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| WC1170C4-5A | West Coast Aerospace, Inc. (USA) |
| TX1027C4-5A PRIMARY | Huck International, Inc (USA) |
| 11825C4-5A | Reid Products Inc. Dba Reid Products Inc (USA) |
| TX1027C4-5A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TX1027C4-5A | Ehrle Reinigungstechnik Gmbh (DEU) |
| 3M1170C4-5A | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| TX1027C4-5A | 5/9 Secondary reference Sps Technologies Inc |
| TX1027C4-5A | 3/2 Design control — primary reference U.S. Government activity |
| TX1027C4-5A | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-509-8087 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-509-8087 has 19 manufacturer part numbers on file: TX1027C4-5A (Hi-Shear Corporation), TX1027C4-5A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 3M1170C4-5A (Heartland Precision Fasteners Inc), 3M1170C4-5A (Saturn Fasteners Inc), 11845C4-5A (Reid Products Inc. Dba Reid Products Inc) and 14 more.
Key specifications for TX1027C4-5A: Point Diameter: 0.425 INCHES NOMINAL IN; Fastener Length: 0.722 INCHES MINIMUM AND 0.752 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.