SS Hex Head Self Tapping Screw
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SS Hex Head Self Tapping Screw

Stainless steel self-tapping screws are fasteners that have a tapered point allowing the screw to thread itself into a pre-drilled hole, though some softer materials may not require pre-drilling. Type A self-tapping screws have coarse threads suitable for use in thin metal, composites, and wood in many cases. The threads taper down to the point, allowing the screw to form threads into the material as the screw is installed. Type A screws are often referred to as sheet metal screws, though they are not a self-drilling tek screw. The hex washer head is less prone to stripping than some other drive types, and has an attached washer style flange under the head which creates a larger surface connection area. Hex washer head type A self-tapping screws listed here are available in 18-8 stainless steel for superior corrosion resistance when compared to steel screws

Dimensional SpecificationsType A Hex Head Self Tapping Screw

Type A Threads for Self Tapping Screws dimensions
ASME B18.6.3-2013
Nominal Size
or Basic Screw
Diameter
Threads
per Inch
D d Drill
Size
Recommended
Hole Diameter
Major
Diameter
Minor
Diameter
Max Min Max Min
#0 0.060 40 0.060 0.057 0.042 0.039    
#1 0.073 32 0.075 0.072 0.051 0.048    
#2 0.086 32 0.088 0.084 0.061 0.056 #48 0.0760
#3 0.099 28 0.101 0.097 0.076 0.071 #46 0.0810
#4 0.112 24 0.114 0.110 0.083 0.078 #44 0.0860
#5 0.125 20 0.130 0.126 0.095 0.090 #36 0.1065
#6 0.138 18 0.141 0.136 0.102 0.096 #32 0.1160
#7 0.151 16 0.158 0.152 0.114 0.108 #30 0.1285
#8 0.164 15 0.168 0.162 0.123 0.116 #29 0.1360
#10 0.190 12 0.194 0.188 0.133 0.126 #21 0.1590
#12 0.216 11 0.221 0.215 0.162 0.155 3/16 0.1875
#14 0.242 10 0.254 0.248 0.185 0.178 7/32 0.2165
  1. Tolerance on Length: Up to 1" incl.: +/- 0.03. Over 1": +/- 0.05.
  2. All dimensions are in inches.
Type A Threads for Self Tapping Screws dimensions
ASME B18.6.3-2013
Nominal
Size
A W H F U J T
Width
Across Flats
Width
Across
Corners
Height of
Head
Diameter
of Washer
Thickness
of Washer
Width
of Slot
Depth
of Slot
Max Min Min Max Min Max Min Max Min Max Min Max Min
#4 0.188 0.181 0.202 0.060 0.049 0.243 0.225 0.019 0.011 0.039 0.031 0.036 0.025
#6 0.250 0.244 0.272 0.093 0.080 0.328 0.302 0.025 0.015 0.048 0.039 0.046 0.033
#7 0.250 0.244 0.272 0.093 0.080 0.328 0.302 0.029 0.017 0.080 0.039 0.054 0.040
#8 0.250 0.244 0.272 0.110 0.096 0.348 0.322 0.031 0.019 0.054 0.045 0.066 0.052
#10 0.312 0.305 0.340 0.120 0.105 0.414 0.384 0.031 0.019 0.060 0.050 0.072 0.057
#12 0.312 0.305 0.340 0.155 0.139 0.432 0.398 0.039 0.022 0.067 0.056 0.093 0.077
#14 0.375 0.367 0.409 0.190 0.172 0.520 0.480 0.050 0.030 0.075 0.064 0.101 0.083
1/4 0.375 0.367 0.409 0.190 0.172 0.520 0.480 0.050 0.030 0.075 0.064 0.101 0.083
5/16 0.500 0.489 0.545 0.230 0.208 0.676 0.624 0.055 0.035 0.084 0.072 0.122 0.100
3/8 0.562 0.551 0.614 0.295 0.270 0.780 0.720 0.063 0.037 0.094 0.081 0.156 0.131
1/2* 0.750 0.735 0.820 0.400 0.367 1.040 0.960 0.085 0.050 0.106 0.091 0.190 0.165
  1. *Slot dimensions for 1/2-inch diameter hex washer head tapping screws are independent of ASME B18.6.3.
  2. All dimensions are in inches.
SS Hex Head Self Tapping Screw
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Diameter Thread Pitch Length Item # Availability Price Quantity UOM
#6 18 3/8 THHS 60037 In Stock $0.03662/EA EA
#6 18 1/2 THHS 60050 In Stock $0.04087/EA EA
#6 18 3/4 THHS 60075 In Stock $0.14924/EA EA
#6 18 1 THHS 60100 In Stock $0.07246/EA EA
#8 15 1/2 THHS 80050 In Stock $0.05766/EA EA
#8 15 3/4 THHS 80075 In Stock $0.13486/EA EA
#8 15 1 THHS 80100 In Stock $0.12963/EA EA
#8 15 1 1/4 THHS 80125 In Stock $0.15529/EA EA
#8 15 1 1/2 THHS 80150 In Stock $0.15656/EA EA
#8 15 2 THHS 80200 In Stock $0.17164/EA EA
#10 12 1/2 THHS 100050 In Stock $0.11602/EA EA
#10 12 3/4 THHS 100075 In Stock $0.1284/EA EA
#10 12 1 THHS 100100 In Stock $0.1304/EA EA
#10 12 1 1/4 THHS 100125 In Stock $0.22779/EA EA
#10 12 1 1/2 THHS 100150 In Stock $0.23/EA EA
#10 12 2 THHS 100200 In Stock $0.31545/EA EA
#10 12 2 1/2 THHS 100250 In Stock $0.34115/EA EA
#10 12 3 THHS 100300 3-5 Working Days $0.28606/EA EA
#12 11 3/4 THHS 120075 In Stock $0.26637/EA EA
#12 11 1 THHS 120100 In Stock $0.17483/EA EA
#12 11 1 1/4 THHS 120125 In Stock $0.15398/EA EA
#12 11 1 1/2 THHS 120150 In Stock $0.29224/EA EA
#12 11 2 THHS 120200 In Stock $0.61046/EA EA
#12 11 2 1/2 THHS 120250 In Stock $0.74479/EA EA
#12 11 3 THHS 120300 3-5 Working Days $0.40866/EA EA
#14 10 1/2 THHS 140050 In Stock $0.29567/EA EA
#14 10 3/4 THHS 140075 In Stock $0.19412/EA EA
#14 10 1 THHS 140100 In Stock $0.20433/EA EA
#14 10 1 1/4 THHS 140125 In Stock $0.2689/EA EA
#14 10 1 1/2 THHS 140150 3-5 Working Days $0.28606/EA EA
#14 10 2 THHS 140200 In Stock $0.58455/EA EA
#14 10 2 1/2 THHS 140250 In Stock $0.3678/EA EA
#14 10 3 THHS 140300 In Stock $0.57094/EA EA