SS Hex Washer Head Tek Screw
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SS Hex Washer Head Tek Screw

Hex head self drilling screws are fasteners that have a drill point which enables users to drill them directly into material without having to pre-drill a hole. Certain sizes available in a #5 point for thicker material up to 1/2" thick.These fasteners are available in 410 stainless steel. With its higher carbon content, 410 stainless steel out performs the drill points on 300 series stainless steel tek screws.

Dimensional Specifications & Product Details#2 & #3 Standard Drill Point for Self Drilling Screws

#2 & #3 Standard Drill Point for Self Drilling Screws dimensions
SAE J78-2013
Nominal Size or
Basic Screw
Diameter
Threads
per Inch
T t P Minimum Practical Nominal Screw
Lengths, Formed Points
Minimum
Torsional
Strength, lb - in
(STEEL SCREWS ONLY)
Major
Diameter
Minor
Diameter
Protrusion
Allowance
Max Min Max Min #2
Point
#3
Point
90° Head,
#2 Point
Csk Head,
#2 Point
90° Head,
#3 Point
Csk Head,
#3 Point
#4 0.112 24 0.114 0.110 0.086 0.082 0.163 - 5/16 3/8 - - 14
#6 0.138 20 0.139 0.135 0.104 0.099 0.190 0.220 5/16 3/8 3/8 7/16 24
#8 0.164 18 0.166 0.161 0.122 0.116 0.211 0.251 3/8 7/16 7/16 1/2 42
#10 0.190 16 0.189 0.183 0.141 0.135 0.235 0.300 7/16 1/2 1/2 9/16 61
#12 0.216 14 0.215 0.209 0.164 0.157 0.283 0.353 1/2 5/8 1/2 5/8 92
#14 0.250 14 0.246 0.240 0.192 0.185 0.318 0.393 1/2 5/8 1/2 5/8 150
  1. All dimensions are in inches.
  Steel Stainless
Material AISI 1016 - 1024 or equivalent steel 410 or 18-8 stainless steel
Heat Treatment Screws shall be quenched in liquid and then
tempered by reheating to 625°F minimum.
410 stainless steel screws shall be hardened
and tempered by heating to 1800°-1900°F
sufficient for austenitization, held for at least
1/2 hour and rapid air or oil-quenched then
reheating to 500°-600°F for at least 1 hour
and air cooled to provide the specified hardness.
Case Hardness Rockwell C52 - 58 410 SS: Rockwell C55 minimum
Case Depth No. 4 & 6 diameter: .002 - .007
No. 8 thru 12 diameter: .004 - .009
1/4 diameter & larger: .005 - .011
-
Core Hardness Rockwell C32 - 40 (after tempering) 410 SS: Rockwell C38 - 42 (after tempering)
18-8 SS: Rockwell B90 - C25 (approx.)

Dimensional Specifications & Product Details#4 & #5 Drill Point Self Drilling Screws for Thicker Materials

#4 & #5 Drill Point Self Drilling Screws for Thicker Materials dimensions
Diameter
& Thread
Pitch
Point
Size
T t A B Drilling
Capacity
Performance Info (STEEL
SCREWS ONLY)
Major
Thread
Diameter
Minor
Thread
Diameter
Drill Point
Length
Drill Point
Diameter
Steel
Gauge
Shear
Strength
(lapped
steel) (lbs)
Pullout
Strength
(lbs)
Max Min Max Min Max Min Max Min Max Min
10-24 #5 0.189 0.181 0.162 0.158 0.413 0.373 0.173 0.165 0.250 0.125 - - -
12-24 #4 0.216 0.207 0.172 0.168 0.523 0.495 0.202 0.190 0.312 0.145 12 2000 1500
12-24 #5 0.216 0.207 0.172 0.168 0.640 0.603 0.202 0.190 0.500 0.250 1/8 2700 2200
1/4 2760 4000
1/4-20 #4 0.246 0.239 0.192 0.185 0.511 0.471 0.227 0.215 0.312 0.145 12 1800 -
1/4-20 #5 0.249 0.242 0.192 0.185 0.629 0.569 0.227 0.222 0.500 0.250 12 1800 -
  1. All dimensions are in inches.
  Steel Stainless
Material AISI 1022 or equivalent steel 410 stainless steel
Heat Treatment Screws shall be quenched in liquid and
then tempered by reheating to 625°F
minimum.
410 stainless steel screws shall be hardened
and tempered by heating to 1800°-1900°F
sufficient for austenitization, held for at
least 1/2 hour and rapid air or oil-quenched
then reheating to 500°-600°F for at least 1
hour and air cooled to provide the specified
hardness.
Case Hardness Rockwell C52 - 58 410 SS: Rockwell C55 minimum
Case Depth No. 10 & 12 diameter: .004 - .009
1/4 diameter & larger: .005 - .011
-
Core Hardness Rockwell C21 - 43 (after tempering) Rockwell C38 - 42 (after tempering)
Shear Strength The average ultimate values for shear
strength are listed in the above table.
Safety factors should be used when
designing final applications.
-
Pullout Strength The average ultimate values for pullout
strength are listed in the above table.
Safety factors should be used when
designing final applications.
-

Dimensional SpecificationsHex & Hex Washer Heads for Self-Tapping & Self-Drilling Screws

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.
SS Hex Washer Head Tek Screw
View
Diameter Thread Pitch Length Tek Type Item # Availability Price Quantity UOM
#6 20 1/2 #2 DHHS 60050 In Stock $0.08406/EA EA
#6 20 1 #2 DHHS 60100 In Stock $0.16522/EA EA
#8 18 3/8 #2 DHHS 80037 In Stock $0.10102/EA EA
#8 18 1/2 #2 DHHS 80050 In Stock $0.06906/EA EA
#8 18 3/4 #2 DHHS 80075 In Stock $0.07728/EA EA
#8 18 1 #2 DHHS 80100 In Stock $0.19514/EA EA
#8 18 2 #2 DHHS 80200 In Stock $0.56416/EA EA
#10 16 1/2 #3 DHHS 100050 In Stock $0.24973/EA EA
#10 16 3/4 #3 DHHS 100075 In Stock $0.2358/EA EA
#10 16 1 #3 DHHS 100100 In Stock $0.17785/EA EA
#10 16 1 1/4 #3 DHHS 100125 In Stock $0.22951/EA EA
#10 16 1 1/2 #3 DHHS 100150 In Stock $0.41332/EA EA
#12 14 3/4 #3 DHHS 120075 In Stock $0.22452/EA EA
#12 14 1 #3 DHHS 120100 In Stock $0.26445/EA EA
#12 14 1 1/4 #3 DHHS 120125 In Stock $0.29845/EA EA
#12 24 1 1/4 #5 DHHS 120125#5 In Stock $0.65799/EA EA
#12 14 1 1/2 #3 DHHS 120150 In Stock $0.31778/EA EA
#12 24 1 1/2 #5 DHHS 120150#5 In Stock $0.57895/EA EA
#12 14 1 3/4 #3 DHHS 120175 In Stock $0.48692/EA EA
#12 14 2 #3 DHHS 120200 In Stock $0.82975/EA EA
#12 24 2 #5 DHHS 120200#5 In Stock $0.89587/EA EA
#12 14 2 1/2 #3 DHHS 120250 In Stock $0.65415/EA EA
#14 14 3/4 #3 DHHS 140075 In Stock $0.31496/EA EA
#14 14 1 #3 DHHS 140100 In Stock $0.34046/EA EA
#14 14 1 1/4 #3 DHHS 140125 In Stock $0.42419/EA EA
#14 14 1 1/2 #3 DHHS 140150 In Stock $0.44009/EA EA
#14 14 2 #3 DHHS 140200 In Stock $0.56314/EA EA
#14 14 2 1/2 #3 DHHS 140250 In Stock $0.68676/EA EA
#14 14 3 #3 DHHS 140300 In Stock $0.90846/EA EA
1/4 28 3 #5 DHHS 140300#5 In Stock $3.63212/EA EA