Hex Head Tek Screw With Washer, Coated
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Hex Head Tek Screw With Washer, Coated

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. The EPDM washer under the head provides a consistent weather-tight seal. In addition to the standard tek points, certain sizes are available in a #1 stitch point for lap joints on metal roofing, or a #5 point for thicker material up to 1/2" thick. These fasteners are available with a long life coating, and in conjunction with the bonded sealing washer these screws are commonly used for metal roofing installation. 

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 Specifications#1 Drill Point for Self Drilling Stitch Screws

#1 Drill Point for Self Drilling Stitch Screws dimensions
Nominal
Diameter
Threads
per Inch
W P
Drill Point Width Length of Drill Point
Max Min Max Min
#10 16 0.157 0.149 0.197 0.157
#12 14 0.183 0.173 0.236 0.197
#14 14 0.220 0.210 0.284 0.244
  1. AISI 1016 - 1024 or equivalent steel
  2. All dimensions are in inches.

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.

Dimensional Specifications & Product DetailsNeo-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

Diameter

Thread Pitch

Thread Type

Width Across Flats

Point Type

Drive Size

Hex Head Tek Screw With Washer, Coated
View
Diameter Thread Pitch Length Tek Type Item # Availability Price Quantity UOM
#12 24 1 1/4 #5 DWHC 120125#5 In Stock $0.38417/EA EA
#12 24 2 #5 DWHC 120200#5 In Stock $0.43/EA EA
#14 14 7/8 Stitch DWHC 140087ST In Stock $0.20312/EA EA
#14 14 1 #3 DWHC 140100 In Stock $0.26643/EA EA
#14 14 1 1/4 #3 DWHC 140125 In Stock $0.2765/EA EA
#14 14 1 1/2 #3 DWHC 140150 In Stock $0.30032/EA EA
#14 14 2 #3 DWHC 140200 In Stock $0.32421/EA EA