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Home / Products / Screws / Rolling Screws / ASME B18.6.4:1998 Truss Head Phillips Thread Forming Lock Screw

ASME B18.6.4:1998 Truss Head Phillips Thread Forming Lock Screw

ASME B18.6.4:1998 Truss Head Phillips Thread Forming Lock Screw combines a Phillips truss head and tapping locking thread and is suitable for applications requiring a large coverage area, low head height, and locking performance in light materials.

The truss head spreads pressure over a wider area to reduce local deformation, while the tapping locking thread provides more stable holding after installation. Compared with ordinary fasteners, this form places more emphasis on controllable installation, surface protection, and efficient management of matching parts for engineering projects requiring stable supply.

It is commonly used in plastic housings, thin metal covers, decorative panels, light clips, and equipment accessories. According to drawings or service conditions, surface coatings, material grades, and thread configurations can be selected to improve overall fastening performance and service life.

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PREV：DIN 7500 (CE):2007 Pan Head Phillips Thread Forming Lock Screw NEXT：DIN 7500 (ME):2000 Countersunk Head Phillips Thread Forming Lock Tapping Screw

Dimensions unit: inch 

Thread size d

2#

3#

4#

5#

6#

8#

10#

1/4

5/16

3/8

7/16

1/2

PP

56

48

40

40

32

32

24

20

18

16

14

13

d

Nominal diameter

0.0860

0.0990

0.1120

0.1250

0.1380

0.1640

0.1900

0.2500

0.3125

0.3750

0.4375

0.5000

dk

Max.

0.194

0.226

0.257

0.289

0.321

0.384

0.448

0.573

0.698

0.823

0.948

1.073

Min.

0.180

0.211

0.241

0.272

0.303

0.364

0.425

0.546

0.666

0.787

0.907

1.028

k

Max.

0.053

0.061

0.069

0.078

0.086

0.102

0.118

0.150

0.183

0.215

0.248

0.280

Min.

0.044

0.051

0.059

0.066

0.074

0.088

0.103

0.133

0.162

0.191

0.221

0.250

M

Reference value

0.098

0.104

0.106

0.122

0.152

0.166

0.182

0.256

0.346

0.376

0.408

0.438

t

Reference value

0.050

0.058

0.060

0.076

0.072

0.086

0.102

0.130

0.180

0.214

0.244

0.276

N

Reference value

0.018

0.018

0.018

0.019

0.027

0.029

0.030

0.033

0.059

0.063

0.068

0.072

Slot number

1

1

1

1

2

2

2

3

4

4

4

4

Depth

Max.

0.052

0.059

0.062

0.078

0.073

0.088

0.104

0.126

0.173

0.206

0.237

0.268

Min.

0.034

0.042

0.044

0.060

0.048

0.063

0.079

0.101

0.148

0.182

0.212

0.243

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