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Square Head Socket Set Screws Cup Point 18-8 Stainless Steel

Square Head Socket Set Screws Cup Point 18-8 Stainless Steel


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Square Head Socket Set Screws Cup Point 18-8 Stainless Steel

A square head screw threaded the entire length. It has a four sided square head at one end and a cup-shaped indentation at the other end. The cup point is the most used style set screw. Designed for fast, permanent and semi-permanent location of parts on shafts with hardness differential of 10-15 Rockwell C points and where cutting in of cup edge on the shaft is acceptable. Stainless Steel 18-8 (A2).

SQUARE HEAD SET SCREW - CUP POINT 18-8 SS
Nominal Size or Basic Screw Diameter F G H K S U W
Width Across
Flats
Width Across
Corners
Head
Height
Neck Relief
Diameter
Neck Relief
Fitted Radius
Neck
Relief Width
Head
Radius
Max Min Max Min Max Min Max Min Max Min Min
No. 10 0.1900 0.188 0.180 0.265 0.247 0.148 0.134 0.145 0.140 0.027 0.083 0.48
1/4 0.2500 0.250 0.241 0.354 0.331 0.196 0.178 0.185 0.170 0.032 0.100 0.62
5/16 0.3125 0.312 0.302 0.442 0.445 0.245 0.224 0.240 0.225 0.036 0.111 0.78
3/8 0.3750 0.375 0.362 0.530 0.497 0.293 0.270 0.294 0.279 0.041 0.125 0.94
7/16 0.4375 0.438 0.423 0.619 0.581 0.341 0.315 0.345 0.330 0.046 0.143 1.09
1/2 0.5000 0.500 0.484 0.707 0.665 0.389 0.361 0.400 0.385 0.050 0.154 1.25
8/16 0.5625 0.562 0.545 0.795 0.748 0.437 0.407 0.454 0.439 0.054 0.167 1.41
5/8 0.6250 0.625 0.606 0.884 0.833 0.485 0.452 0.507 0.492 0.059 0.182 1.56
3/4 0.7500 0.750 0.729 1.060 1.001 0.582 0.544 0.620 0.605 0.065 0.200 1.88
7/8 0.8750 0.875 0.852 1.237 1.170 0.678 0.635 0.731 0.716 0.072 0.222 2.19
1 1.0000 1.000 0.974 1.414 1.337 0.774 0.726 0.838 0.823 0.081 0.250 2.50
1-1/8 1.1250 1.125 1.096 1.591 1.505 0.870 0.817 0.939 0.914 0.092 0.283 2.81
1-1/4 1.2500 1.250 1.219 1.768 1.674 0.966 0.908 1.064 1.039 0.092 0.283 3.12
1-3/8 1.3750 1.375 1.342 1.945 1.843 1.063 1.000 1.159 1.134 0.109 0.333 3.44
1-1/2 1.5000 1.500 1.464 2.121 2.010 1.159 1.091 1.284 1.259 0.109 0.333 3.75
See Notes 1, 3 2            
 
NOTES: (3 and 4 are on next page)
(1) Where specifying nominal size in decimals, zeros preceding the decimal and in the fourth decimal place shall be omitted.
(2) For additional requirement, see Introductory Notes and Genral Data for Square Head Set Screw,page J-1.
 
 
Nominal Size or Basic Screw Diameter C P Q Q1 R Y
Cup and Flat Point Diameters Dog and Half Dog
Point Diameters
Point Length
Oval Point Radius Cone Point Angle 9oo + 2o
for Those Nominal Lengths or Longer;
1180 + 2o for shorter screws
Max Min Max Min Max Min Max Min +0.031
-0.000
No. 10 0.1900 0.102 0.088 0.127 0.120 0.095 0.085 0.050 0.040 0.142 1/4
1/4 0.2500 0.132 0.118 0.156 0.149 0.130 0.120 0.068 0.058 0.188 5/16
5/6 0.3125 0.172 0.156 0.203
0.195 0.161
0.151 0.083 0.073 0.234 3/8
3/8 0.3750 0.212 0.194 0.250 0.241 0.193 0.183 0.099 0.089 0.281 7/16
7/16 0.4375 0.252 0.232 0.297 0.287 0.224 0.214 0.114 0.104 0.328 1/2
1/2 0.5000 0.291 0.270 0.344 0.334 0.255 0.245 0.130 0.120 0.375 9/16
9/16 0.5625 0.332 0.309 0.391 0.379 0.287 0.275 0.146
0.134 0.422
5/8
5/8 0.6250 0.371 0.347 0.469 0.456 0.321 0.305 0.164 0.148 0.469 3/4
3/4 0.7500 0.450 0.425 0.562 0.549 0.383 0.367 0.196 0.180 0.562 7/8
7/8 0.8750 0.530 0.502 0.656 0.642 0.446 0.430 0.227 0.211 0.656 1
1 1.0000 0.609 0.579 0.750 0.734 0.510 0.490 0.260 0.240 0.750 1-1/8
1-1/8 1.1250 0.689 0.655 0.844 0.826 0.572 0.552 0.291 0.271 0.844 1-1/4
1-1/4 1.2500 0.767 0.733 0.938 0.920 0.635 0.615 0.323 0.303 0.938 1-1/2
1-3/8 1.3750 0.848 0.808 1.031 1.011 0.698 0.678 0.354 0.334 1.031 1-5/8
1-1/2 1.5000 0.926 0.886 1.125 1.105 0.760 0.740 0.365 0.365 0.125 1-3/4
See Notes 1,3 4            

NOTES:(1 and 2 are on previous page)

(3) Point angle X shall be 45o plus 5o, minus 0o, for screws of nominal lengths equal to or longer than those listed in Column Y, and 30o minimum for screws of shoter nominal lengths.

(4) The extent of rounding or flat at apex of cone point shall not exceed an amount equivalent to 10 percent of the basic screw diameter.