QingDao Altak Trading Co.,Ltd

Thread Rolling Screws

Nominal Size

Phillips
Driver Size

Head Diameter

Height of Head

Width of Slot

Depth of Slot

Dimensions of Recess

Diameter

Depth

Width

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

2
4
5
6
7*
8
9*
10
12
14*
1/4
5/16
3/8
1/2

.172
.225
.252
.279
.305
.332
.358
.385
.438
.491
.507
.635
.762
.875

147
.195
.220
.244
.268
.292
.316
.340
.389
.437
.452
.568
.685
775

.051
.067
.075
.083
.091
.100
.108
.116
.132
.148
.153
.191
.230
.223

.040
.055
.062
.069
.076
.084
.091
.098
.112
.127
.131
.165
.200
.198

.031
.039
.043
.048
.048
.054
.054
.060
.067
.075
.075
.084
.094
.106

.023
.031
.035
.039
.039
.045
.045
.050
.056
.064
.064
.072
.081
.091

.023
.030
.034
.038
.041
.045
.049
.053
.060
.068
.070
.088
.106
.103

.015
.020
.022
.024
.027
.029
.032
.034
.039
.044
.046
.058
.070
.065

.102
.128
.154
.174
.182
.189
.258
.204
.268
.283
.283
.365
.393
.424

.089
.115
.141
.161
.169
.176
.245
.191
.255
.270
.270
.352
.380
.411

.063
.089
.086
.106
.114
.121
.146
.136
.156
.171
.171
.216
.245
.276

.017
.018
.027
.029
.030
.031
.034
.032
.036
.039
.035
.061
.065
.069

1
1
2
2
2
2
2
2-3*
3
3
3
4
4
4

Nominal
Size

Width
Across
Flats

Width
Across
Corners

Height
of
Head

Diameter
of
Washer

Thickness
of
Washer

Width
of
Slot

Depth
of
Slot

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

4
6
7
8
10
12
14
1/4
5/16
3/8

.187
.250
.250
.250
.312
.312
.438
.375
.500
.562

.181
.244
.244
.244
.305
.305
.428
.367
.489
.551

.202
.272
.272
.272
.340
.340
.409
.409
.545
.614

.060
.093
.093
.110
.120
.155
.190
.190
.230
.295

.049
.080
.080
.096
.105
.139
.172
.172
.208
.270

.243
.328
.328
.348
.414
.432
.520
.520
.676
.780

.225
.302
.302
.322
.384
.398
.480
.480
.624
.720

.019
.025
.029
.031
.031
.039
.050
.050
.055
.063

.011
.015
.017
.019
.019
.022
.030
.030
.035
.037

.039
.048
.048
.054
.060
.067
.075
.075
.084
.094

.031
.039
.039
.045
.050
.056
.064
.064
.072
.081

.042
.053
.062
.074
.080
.103
.111
.111
.134
.168

.025
.033
.040
.052
.057
.077
.083
.083
100
.131

Nominal
Size

Phillips
Driver
Size

Head Diameter

Height of Head

Width of Slot

Depth of Slot

Dimensions of Recess

Slotted

Recessed

Diameter

Depth

Width

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

Max.

Min.

2
3
4
5
6
7
8
10
12
1/4
5/16
3/8

.167
.193
.219
.245
.270
.296
.322
.373
.425
.492
.615
.740

.155
.180
.205
.231
.256
.281
.306
.357
.407
.473
.594
.716

.053
.060
.068
.075
.082
.089
.096
.110
.125
.144
.178
.212

.045
.051
.058
.065
.072
.079
.085
.099
.112
.130
.162
.195

.062
.071
.080
.089
.097
.106
.115
.133
.151
.175
.218
.261

.053
.062
.070
.079
.087
.096
.105
.122
.139
.162
.203
.244

.031
.035
.039
.043
.048
.048
.054
.060
.067
.075
.084
.094

.023
.027
.031
.035
.039
.039
.045
.050
.056
.064
.072
.081

.031
.036
.040
.045
.050
.054
.058
.068
.077
.087
.106
.124

.022
.026
.030
.034
.037
.041
.045
.053
.061
.070
.085
.100

.104
.112
.122
.158
.166
.176
.182
.199
.259
.281
.350
.389

.091
.099
.109
.145
.153
.163
.169
.186
.246
.268
.337
.376

.059
.068
.078
.083
.091
.100
.108
.124
.141
.161
.193
.233

.017
.019
.019
.028
.028
.029
.030
.031
.034
.036
.169
.210

1
1
1
2
2
2
2
2
3
3
4
4

Plastite® Thread Rolling Screws

®Plastite is a registered trademark of REMINC (Research Engineering & Manufacturing Inc.)

Screw Size	C		D		Minimum Out-Of Round	Recommended Pilot Hole Sizes
	Dia. of Circumscribing Circle		Measurements Across Center
	Max.	Min.	Max.	Min.		Soft Ductile Materials	Brittle Materials
6 8 10 14	.147 .185 .212 .276	.141 .179 .206 .270	.143 .179 .208 .268	.137 .173 .202 .262	.003 .004 .004 .006	.122 .149 .175 .224	.128 .158 .185 .240

Dowel Screws

Size

Thread Length

Collar Length

3/16-11	xl 1/2
	x2
	x2 1/2
	x3

	3/4
	7/8
	11/8
	1 3/8

	--
	1/4
	1/4
	1/4

1/4-10	xl 1/2
	x2
	x2 1/2
	x3
	x3 1/2

	3/4
	7/8
	11/8
	1 3/8
	1 5/8

	--
	1/4
	1/4
	1/4
	1/4

5/16-9	xl 1/2
	xl 3/4
	x2
	x2 1/2
	x3
	x3 1/2
	x4

	3/4
	3/4
	7/8
	1 1/8
	1 3/8
	1 5/8
	1 5/8

	--
	1/4
	1/4
	1/4
	1/4
	1/4
	3/4

3/8-7	x2 1/2
	x3
	x3 1/2
	x4

	1 1/8
	1 3/8
	1 5/8
	1 5/8

	1/4
	1/4
	1/4
	3/4

Thread Rolling Screws

		C		D		G	Thread Length	Torsional Strength
Size of Screw						Point	Thread Length	Torsional Strength
Inch Nominal Screw Size Dia.- T.P.I.	MM Nominal Screw Pitch Dia.- Pitch	Diameter of Circumscribing Circle		Measurement Across Center		Dia. of Circum. Circle	Screw Lengths as Listed & Shorter Thread to Head	(Free breaking Torque of screw)
		Maximum	Minimum	Maximum	Minimum	Maximum	Screw Lengths as Listed & Shorter Thread to Head	Minimum
		In.	In.	In.	In.	In.	In.	lb.In.	Nm.
2-56 3-48 4-40 5-40 6-32	2.5-0.45 2.5-0.53 2.8-0.64 3.2-0.64 3-5-0.79	.0875 .1010 .1145 .1275 .1410	.0835 .0970 .1105 .1235 .1350	.0840 .0970 .1095 .1225 .1350	.0800 .0930 .1055 .1185 .1290	.070 .081 .090 .103 .111	5/8 5/8 3/4 7/8 7/8	6 10 14 22 24	-- -- -- 2.71
8-32 10-24 10-32 12-24 1/4-20	4.2-0.79 4.8-1.06 4.8-0.79 5.5-1.06 6.3-1.27	.1670 .1940 .1930 .2200 .2550	.1610 .1880 .1870 .2140 .2490	.1610 .1850 .1870 .2110 .2460	.1550 .1790 .1810 .2050 .2400	.137 .153 .163 .179 .206	1 1 1/4 1 1/4 1 3/8 1 1/2	48 65 81 105 160	5.40 7.34 9.15 11.90 18.10
5/16-18 3/8-16 7/16-14 1/2-13	7.9-1.41 9.5-1.59 11.1-1.81 12.7-1.95	.3180 .3810 .4445 .5075	.3120 .3750 .4385 .5015	.3080 .3710 .4315 .4935	.3020 .3650 .4255 .4875	.264 .320 .375 .433	1 1/2 1 1/2 1 1/2 1 1/2	340 620 950 1450	38.40 70.00 107.33 163.82

Statistic：