Wholesale ASME/ANSI B18.6.2 (T4):1998 Square Head Set Screw

Home / Products / Screws / Set Screws / ASME/ANSI B18.6.2 (T4):1998 Square Head Set Screw

ASME/ANSI B18.6.2 (T4):1998 Square Head Set Screw

ASME/ANSI B18.6.2 (T4):1998 Square Head Set Screw uses an external square head that can be driven with a wrench, making it suitable for positioning and locking applications where internal drive tools are not preferred or where strong tactile feedback is useful.

The exposed square head is easy to see, grip, and remove, which benefits equipment requiring frequent maintenance or field adjustment with sufficient clearance. This set screw can be used for collars, handwheels, fixture clamps, and light to medium-duty mechanical stops.

It is suitable for industrial maintenance, transmission accessory fixing, agricultural machinery, fixtures, and general mechanical connections. Material and finish options can be selected to maintain good serviceability in oily, dusty, or outdoor environments.

Contact Us

 Dimensions unit: inch 

Thread size d

10#
0.1900

1/4
0.2500

5/16
0.3125

3/8
0.3750

7/16
0.4375

1/2
0.5000

9/16
0.5625

5/8
0.6250

3/4
0.7500

7/8
0.8750

1
1.0000

1-1/8
1.1250

1-1/4
1.2500

1-3/8
1.3750

1-1/2
1.5000

s

Max.

0.188

0.250

0.312

0.375

0.438

0.500

0.562

0.625

0.750

0.875

1.000

1.125

1.250

1.375

1.500

Min.

0.180

0.241

0.302

0.362

0.423

0.484

0.545

0.606

0.729

0.852

0.974

1.096

1.219

1.342

1.464

e

Max.

0.265

0.354

0.442

0.530

0.619

0.707

0.795

0.884

1.060

1.237

1.414

1.591

1.768

1.945

2.121

Min.

0.247

0.331

0.415

0.497

0.581

0.665

0.748

0.833

1.001

1.170

1.337

1.505

1.674

1.843

2.010

k

Max.

0.148

0.196

0.245

0.293

0.341

0.389

0.437

0.485

0.582

0.678

0.774

0.870

0.966

1.063

1.159

Min.

0.134

0.178

0.224

0.270

0.315

0.361

0.407

0.452

0.544

0.635

0.726

0.817

0.908

1.000

1.091

ds

Max.

0.145

0.185

0.240

0.294

0.345

0.400

0.454

0.507

0.620

0.731

0.838

0.939

1.064

1.159

1.284

Min.

0.140

0.170

0.225

0.279

0.330

0.385

0.439

0.492

0.605

0.716

0.823

0.914

1.039

1.134

1.759

r

Max.

0.027

0.032

0.036

0.041

0.046

0.050

0.054

0.059

0.065

0.072

0.081

0.092

0.092

0.109

0.109

L1

Min.

0.083

0.100

0.111

0.125

0.143

0.154

0.167

0.182

0.200

0.222

0.250

0.283

0.283

0.333

0.333

R

Min.

0.48

0.62

0.78

0.94

1.09

1.25

1.41

1.56

1.88

2.19

2.50

2.81

3.12

3.44

3.75

①, End type. When not specified, lag set screw ends shall be recessed. The concave end can be knurled internally or externally according to the manufacturer's wishes. The parameters of the tapered end, long cylindrical end, semi-cylindrical end, flat end and rounded end are detailed in Table 2.5.1-1.

② The angle of the end only applies to the part below the thread root, because the angle within the thread profile may change due to different manufacturing processes.

③ long cylindrical end. When the effective thread length is less than the nominal thread diameter, long cylindrical ends should not be used. In this case a semi-cylindrical end should be used.

④ Thread series and grade. Square head set screws shall be uniform threaded as specified by ASME B1.1, inch system, fine thread or 8-thread series, Class 2A. For threads with coatings, their dimensions should meet Class 2A accuracy before coating. The threads after coating must pass the basic Class 3A general gauge and Class 2A thread gauge for minimum material or stop gauge inspection.

⑤ If not specified, the screw thread size shall be accepted according to the requirements of the 21 system in ASME B1.3. 

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/ANSI B18.6.2 (T4):1998 Square Head Set 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/ANSI B18.6.2 (T4):1998 Square Head Set 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/ANSI B18.6.2 (T4):1998 Square Head Set 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

Contact

Certification

Certificate of Honor

  • Certificate
  • Certificate
  • Certificate
  • Certificate
  • Certificate
  • Certificate

NEWS

Latest News