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SS Hex Washer Head Tek Screw

Selected Hex Washer Head Self Drilling Tek Stainless Steel18-8 SS Hex Washer Head Tek Screw
Hex Washer Head Self Drilling Tek Stainless Steel18-8 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.

Products

Dimensional Specifications

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.

#2 & #3 Standard Drill Point

#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.)

 

 

#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.		 -