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For over 20 years, GRK has produced contractor-grade fasteners for professional use, incorporating innovative design features to make screws that are faster and easier to drive, hold better in wood, plastic and composite materials, and reduce the risk of splitting.

GRK screws all have Torx heads (and are supplied with a matching Torx bit) to reduce the potential for cam-out and slippage in the drive. The hardened steel screws have a rust-resistant Climatek™ coating that won’t react with treated lumber; the 305 stainless-steel versions have a Pheinox™ coating for additional long-term corrosion resistance in marine environments, below-ground use or other harsh conditions.

These Torx-drive screws have a pattern of cutting ridges on the underside of the head to automatically countersink the screw. Self-tapping tips eliminate the need for pre-drilling; all except the 1” screws have sawtooth-like ridges on the threads near the tip to reduce friction and driving effort. Secondary threads enlarge the upper portion of the hole slightly so the screw seats snugly with less torque.

Some products are no longer available.

 
A. R4™ Screws, Climatek™
   
 
Size
Quantity
Included Torx Bit
 
93Z08.06
#8 x 1"
100
T-15
$5.10
N/A
93Z08.10
#8 x 1-1/4"
100
T-15
$5.30
N/A
93Z08.12
#8 x 1-1/2"
100
T-15
$6.70
N/A
93Z08.16
#8 x 2"
100
T-15
$8.30
N/A
93Z08.20
#8 x 2-1/2"
100
T-15
$10.30
Add to cartOnline: Not available
93Z09.10
#9 x 1-1/4"
100
T-25
$6.40
N/A
93Z09.12
#9 x 1-1/2"
100
T-25
$7.75
N/A
93Z09.14
#9 x 1-3/4"
100
T-25
$8.80
Add to cartOnline: Available
93Z09.16
#9 x 2"
100
T-25
$9.40
N/A
93Z09.76
#9 x 2"
690 (pail)
T-25
$55.20
Add to cartOnline: Currently out of stock, expected October 17
93Z09.20
#9 x 2-1/2"
100
T-25
$11.00
Add to cartOnline: Available
93Z09.80
#9 x 2-1/2"
575 (pail)
T-25
$55.20
Add to cartOnline: Currently out of stock, expected October 17
93Z09.22
#9 x 2-3/4"
100
T-25
$12.40
N/A
93Z09.25
#9 x 3-1/8"
100
T-25
$15.50
Add to cartOnline: Available
93Z09.85
#9 x 3-1/8"
425 (pail)
T-25
$55.20
Add to cartOnline: Currently out of stock, expected October 17
93Z10.20
#10 x 2-1/2"
100
T-25
$13.10
N/A
93Z10.22
#10 x 2-3/4"
100
T-25
$15.40
N/A
93Z10.25
#10 x 3-1/8"
100
T-25
$18.70
Add to cartOnline: Available
93Z10.28
#10 x 3-1/2"
50
T-25
$11.40
Add to cartOnline: Available
93Z10.32
#10 x 4"
50
T-25
$12.80
Add to cartOnline: Currently out of stock, expected October 17
93Z10.38
#10 x 4-3/4"
50
T-25
$14.80
Add to cartOnline: Currently out of stock, expected October 17
93Z12.45
#12/#14 x 5-5/8"
50
T-25
$28.00
Add to cartOnline: Available
93Z12.51
#12/#14 x 6-3/8"
50
T-25
$33.30
Add to cartOnline: Available
93Z12.57
#12/#14 x 7-1/4"
50
T-25
$51.90
Add to cartOnline: Available

B. R4™ Screws, Stainless Steel/Pheinox™
   
 
Size
Quantity
Included Torx Bit
 
93Z08.60
#8 x 1-1/4"
100
T-15
$11.10
N/A
93Z08.62
#8 x 1-1/2"
100
T-15
$13.80
N/A
93Z08.64
#8 x 1-3/4"
100
T-25
$14.30
N/A
93Z09.62
#9 x 1-1/2"
100
T-25
$15.80
N/A
93Z09.64
#9 x 1-3/4"
100
T-25
$17.70
N/A
93Z09.66
#9 x 2"
100
T-25
$20.70
Add to cartOnline: Not available
93Z10.70
#10 x 2-1/2"
100
T-25
$28.50
Add to cartOnline: Not available
93Z10.75
#10 x 3-1/8"
100
T-25
$38.30
N/A
93Z10.82
#10 x 4"
50
T-25
$23.80
N/A
93Z12.75
#12/#14 x 3-1/8"
100
T-25
$63.40
N/A

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