Wholesale ASME B18.2.1 (T9):2012 External Hexalobular Torx Screw

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ASME B18.2.1 (T9):2012 External Hexalobular Torx Screw

ASME B18.2.1 (T9):2012 External Hexalobular Torx Screw combines an external Torx drive with a flanged bearing surface. It is suitable for threaded joints requiring stable tool engagement, higher assembly efficiency, and reduced washer use.

The screw can be driven into tapped holes or used with internally threaded components for automotive parts, motors, machinery housings, brackets, and equipment panels. The flange distributes clamping pressure, and the external Torx drive supports automated or high-efficiency installation.

Drive size, engagement depth, base material strength, and finish should be confirmed. For high-speed production lines, drive-head accuracy and tool wear should be controlled to maintain stable tightening.

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Dimensions unit: mm

Thread size d

1/4

5/16

3/8

7/16

1/2

9/16

5/8

3/4

7/8

1

1-1/8

1-1/4

1-3/8

PP

UNC

20

18

16

14

13

12

11

10

9

8

7

7

6

dk

Reference

0.287

0.362

0.431

0.499

0.571

0.645

0.715

0.86

1

1.138

1.28

1.42

1.562

k

Max.

0.255

0.323

0.394

0.472

0.515

0.551

0.63

0.787

0.866

1.063

1.181

1.299

1.417

Min.

0.245

0.313

0.384

0.462

0.505

0.541

0.62

0.777

0.856

1.053

1.171

1.289

1.407

h

Max.

0.07

0.1

0.125

0.155

0.16

0.165

0.2

0.255

0.27

0.355

0.382

0.422

0.453

Min.

0.06

0.09

0.115

0.145

0.15

0.153

0.188

0.243

0.26

0.343

0.37

0.41

0.441

dc

Max.

0.375

0.469

0.562

0.656

0.75

0.844

0.938

1.125

1.312

1.5

1.688

1.875

2.062

Min.

0.365

0.457

0.55

0.642

0.735

0.828

0.921

1.107

1.293

1.479

1.665

1.852

2.038

B

Max.

0.2073

0.2663

0.3103

0.3613

0.4113

0.4663

0.5183

0.6183

0.7193

0.8393

0.9433

1.0463

1.1513

Torx header code

E8

E10

E12

E14

E16

E18

E20

E24

E28

E32

E36

E40

E44

ds

Max.

0.25

0.3125

0.375

0.4375

0.5

0.5625

0.625

0.75

0.875

1

1.125

1.25

1.375

Min.

0.245

0.3065

0.369

0.4305

0.493

0.5545

0.617

0.741

0.866

0.99

1.114

1.239

1.363

b

L≤6

0.75

0.875

1

1.125

1.25

1.375

1.5

1.75

2

2.25

2.5

2.75

3

L>6

1

1.125

1.25

1.375

1.5

1.625

1.75

2

2.25

2.5

2.75

3

3.25

r

Max.

0.025

0.025

0.025

0.025

0.025

0.45

0.45

0.45

0.065

0.095

0.095

0.095

0.095

Min.

0.015

0.015

0.015

0.015

0.015

0.02

0.02

0.02

0.04

0.06

0.06

0.06

0.06

Thousand pieces of steel weigh ≈kg

Reference value

-

-

-

-

-

-

-

-

-

-

-

-

-

Thread length b

Reference value

-

-

-

-

-

-

-

-

-

-

-

-

-

FAQ

Frequently Asked Questions

  • 1. How soon can I expect a reply after sending an inquiry?

    A: We take every inquiry seriously. On working days, we will respond within 12 hours after receiving your inquiry.

  • 2. What products do you mainly offer?

    A: We focus on the production of fasteners made of carbon steel, stainless steel, and low-alloy steel. We are a direct manufacturer with independent production capacity. ASME B18.2.1 (T9):2012 External Hexalobular Torx Screw Factory. We own several fastener manufacturing facilities and have an international sales department, providing full-process services from production to export.

  • 3. Do you support customized production?

    A: Customized production is our core business. We can develop and manufacture products based on the drawings or samples you provide.

  • 4. Do you produce standard parts?

    A: Yes. In addition to custom products, we also produce general construction machinery parts (GET parts) for equipment such as excavators, including bucket teeth, tooth holders, corner blades, pins, clips, bolts and nuts. ASME B18.2.1 (T9):2012 External Hexalobular Torx Screw Wholesale.

  • 5. What is your production capacity?

    A: We have 12 energy-efficient and environmentally friendly modern production lines (including one fully automatic shell molding line and four heat treatment lines), with an annual production capacity exceeding 20,000 tons, enabling us to steadily meet various order requirements.

  • 6. What are your payment terms?

    A: Trade terms (such as FOB, CIF, etc.) are confirmed when quoting. For batch production, we typically require a 30% deposit, with the balance paid against the copy of the bill of lading. T/T is the main payment method accepted, and L/C can also be negotiated.

  • 7. How is the shipment arranged?

    A: We are only 35 km away from Shanghai Port and Ningbo Port, so sea freight is the main mode of transportation, which is convenient and efficient. For urgent deliveries, we can also arrange air freight via Ningbo or Shanghai airports.

Better Fastener Industry Co., Ltd.

About Us

BETTER FASTENER INDUSTRY CO., LTD.

Better Fastener is a professional fastener enterprise specializing in the manufacturing of steel washers, stainless steel washers, spring washers and sealingwashers. Founded in 2001 as a washer factory, the company expanded into a comprehensive enterprise integrating washers, nuts, bolts, spring nuts and other fastener products in 2010. ASME B18.2.1 (T9):2012 External Hexalobular Torx Screw Suppliers in China.

The company positions itself as a provider of comprehensive one-stop services for customers, relying on technological R&D, industrial investment and trade distribution.

With an experienced professional team and a sound sales network, Better Fastener has achieved excellent sales performance in both domestic and foreign markets,and has grown into one of the competitive manufacturers and suppliers in China's industrial fastener industry.

Better Fastener is committed to becoming a trusted fastener supplier for customers with reliable product quality, reasonable prices and on-time delivery

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