Hex Head Self Tapping Screw With Washer, Plated
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Hex Head Self Tapping Screw With Washer, Plated

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 head is less prone to stripping than some other drive types, and has an attached EPDM washer under the head to provide a weather-tight seal. Hex head head type A self-tapping screws with the bonded sealing washer listed here have a zinc plated finish for added corrosion protection. 

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.
Hex & Hex Washer Heads for Self-Tapping & Self-Drilling Screws dimensions
ASME B18.6.3-2013
Nominal
Size
A W H F U
Width
Across Flats
Width
Across
Corners
Height of
Head
Diameter of
Washer
Thickness of
Washer
Max Min 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
#6 0.250 0.244 0.272 0.093 0.080 0.328 0.302 0.025 0.015
#7 0.250 0.244 0.272 0.093 0.080 0.328 0.302 0.029 0.017
#8 0.250 0.244 0.272 0.110 0.096 0.348 0.322 0.031 0.019
#10 0.312 0.305 0.340 0.120 0.105 0.414 0.384 0.031 0.019
#12 0.312 0.305 0.340 0.155 0.139 0.432 0.398 0.039 0.022
#14 0.375 0.367 0.409 0.190 0.172 0.520 0.480 0.050 0.030
  1. All dimensions are in inches.

Dimensional SpecificationsNeo-EPDM Washers Used With Self Drilling Screws

Neo-EPDM Washers Used With Self Drilling Screws dimensions
For Use
with
Screw of
this
Nominal
Diameter
S N G C E
Outside
Diameter of
Steel Section
Inside
Diameter of
Steel Section
Thickness
of Steel
Section
Inside
Diameter of
EPDM Section
Thickness of
EPDM Section
Max Min Max Min Ref Max Min Max Min
#8 0.507 0.491 0.212 0.196 0.031 0.149 0.126 0.087 0.070
#10 0.507 0.491 0.212 0.196 0.031 0.149 0.023 0.087 0.070
#12 0.558 0.542 0.243 0.227 0.031 0.197 0.172 0.087 0.070
#14 0.617 0.601 0.275 0.259 0.031 0.232 0.208 0.087 0.070
  1. NOTE: There is no single standard for Neo-EPDM dimensions. These values are offered as a guide; deviations from these specifications may occur.
  2. All dimensions are in inches.
Material Steel Section of Washer: 20 gauge steel
Elastic Section of Washer: Style 40 EPDM sheet
Hardness EPDM Material: Shore A 65 - 75 (Durometer scale)
Plating Steel Section of Washer: Galvanized
Narrow Results
Hex Head Self Tapping Screw With Washer, Plated
View
Diameter Thread Pitch Length Item # Availability Price Quantity UOM
#8 15 3/4 TWHP 80075 In Stock $0.06909/EA EA
#8 15 1 TWHP 80100 In Stock $0.06695/EA EA
#8 15 1 1/2 TWHP 80150 In Stock $0.07728/EA EA
#10 12 3/4 TWHP 100075 In Stock $0.06831/EA EA
#10 12 1 TWHP 100100 In Stock $0.07485/EA EA
#10 12 1 1/4 TWHP 100125 In Stock $0.195/EA EA
#10 12 1 1/2 TWHP 100150 In Stock $0.195/EA EA
#10 12 2 TWHP 100200 In Stock $0.02337/EA EA
#10 12 2 1/2 TWHP 100250 In Stock $0.00325/EA EA
#12 11 1 TWHP 120100 In Stock $0.13507/EA EA
#12 11 2 1/2 TWHP 120250 In Stock $0.25083/EA EA
#12 11 3 TWHP 120300 In Stock $0.30299/EA EA
#14 10 1 TWHP 140100 In Stock $0.22129/EA EA
#14 10 1 1/4 TWHP 140125 In Stock $0.22255/EA EA
#14 10 1 1/2 TWHP 140150 In Stock $0.26142/EA EA
#14 10 2 TWHP 140200 In Stock $0.32086/EA EA
#14 10 2 1/2 TWHP 140250 In Stock $0.34797/EA EA
#14 10 3 TWHP 140300 In Stock $0.49487/EA EA