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Home / Products / Screws / Phillips Screw / ASME B18.6.3 (H9B-I):2024 Hex Head Heavy Hex Phillips Screw

ASME B18.6.3 (H9B-I):2024 Hex Head Heavy Hex Phillips Screw

ASME B18.6.3 (H9B-I):2024 Hex Head Heavy Hex Phillips Screw combines a Phillips drive with a hex head, making it suitable for fastening points that require reliable clamping, removable maintenance, and standardized assembly. The ASME standard framework suits projects requiring U.S.-standard compatibility and engineering applicability, supporting smooth alignment between engineering drawings, purchasing lists, and quality inspection.

From an assembly perspective, the cross recess provides good centering and suits production assembly, workstation operations, and joints requiring controlled driving. At the same time, the external hex head provides a robust driving form for installation and removal with wrenches, sockets, or power tools, so the screw can provide stable fastening performance across different sheet thicknesses, appearance requirements, and space limitations.

It works well for equipment connections, bracket fastening, structural assemblies, and sites requiring convenient maintenance. For batch assembly, the product can be tailored around workstation tools, tightening torque, visual grade, and packaging method to reduce sorting cost and improve assembly consistency.

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Dimensions unit: inch

Thread size d

1#

2#

3#

4#

5#

6#

8#

10#

12#

1/4

5/16

3/8

d

Nominal

0.073

0.086

0.099

0.112

0.125

0.138

0.164

0.19

0.216

0.25

0.3125

0.375

PP

64

56

48

40

40

32

32

24

24

20

18

16

M

Reference value

0.072

0.086

0.092

0.097

0.105

0.148

0.168

0.178

0.247

0.277

0.359

0.387

Slot number

0

1

1

1

1

2

2

2

3

3

4

4

P

Max.

0.054

0.054

0.06

0.067

0.076

0.089

0.115

0.127

0.152

0.186

0.234

0.267

Min.

0.036

0.036

0.042

0.049

0.058

0.064

0.09

0.102

0.127

0.161

0.21

0.243

s1

Standard type

Max.

0.125

0.125

0.188

0.188

0.188

0.25

0.25

0.312

0.312

0.375

0.5

0.562

Min.

0.12

0.12

0.181

0.181

0.181

0.244

0.244

0.305

0.305

0.367

0.489

0.551

s2

Big hexagon

Max.

/

/

/

0.219

0.25

/

0.312

/

0.375

0.438

/

/

Min.

/

/

/

0.213

0.244

/

0.305

/

0.367

0.428

/

/

e1

Standard type

Min.

0.134

0.134

0.202

0.202

0.202

0.272

0.272

0.34

0.34

0.409

0.545

0.614

e2

Big hexagon

Min.

/

/

/

0.238

0.272

/

0.34

/

0.409

0.477

/

/

k

Max.

0.044

0.05

0.055

0.06

0.07

0.093

0.11

0.12

0.155

0.19

0.23

0.295

Min.

0.036

0.04

0.044

0.049

0.058

0.08

0.096

0.105

0.139

0.172

0.208

0.27

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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.

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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NEWS

Latest News

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  • What is a Bolt?

    Simply put, a bolt is a cylindrical fastener with external threads. It works with a matching nut or is screwed directly into a threaded hole of the mating part to firmly hold two or more components together. To put it intuitively, think of it as a "metal nail." However, unlike a nail that is driven in with a hammer, a ...

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