Why our patent SKT II Super Screw® without type 17 better
than regular decking screw with type 17
1. Testing Screw Size：# 9x3”
A
B
C
D
A：Regular decking screw without type 17
Green Ruspert coating
B：Regular decking screw with type 17
Green Ruspert coating
C：Super screw without type 17
Silver SKT® coating
D：Super screw with type 17
Silver SKT® coating
2. Wood crack test on OAK wood and BEECH hard wood closing to wood edge
D：SKT II Super Screw® with
A：Regular decking screw
®
without type 17
type 17 / Silver SKT Coating
Green Ruspert Coating
On OAK hard wood
C：SKT II Super Screw® without
B：Regular decking screw
type 17 / Silver SKT® Coating
with type 17
Green Ruspert Coating
1
B：Regular decking screw with type 17
A：Regular decking screw without type 17
Green Ruspert Coating
Green Ruspert Coating
Serious crack
OAK wood
Slight crack
D：SKT II Super Screw® with type 17
C：SKT II Super Screw® without type 17
®
®
Silver SKT Coating
Silver SKT Coating
OAK wood
No wood crack
2
D：SKT II Super Screw® with type 17 C：SKT II Super Screw® without type 17
Silver SKT® Coating
Silver SKT® Coating
No wood crack
COMMENTS：
1. Regular decking screw with type 17 is better than without type 17 on
wood crack performance. But it is not better than SKT II Super Screw® .
2. SKT II Super Screw® with type 17 or without type 17 has a better
performance on wood crack than regular decking screw.
3
3. Drilling in torque test


Torsional equipment ：SCHATZ drilling in torsional reader
Wood：OAK wood
 Test method：Drill screw into OAK wood to read torsional values. The lower is better.
Units：LBS-IN
A:
B:
C:
D:
Regular Decking
Regular Decking
Super screw
Super screw
screw without type 17
screw with type 17
without type 17
With type 17
No 01
19.24
22.25
15.36
17.66
No 02
25.87
23.52
16.24
15.45
No 03
22.69
24.22
17.39
16.24
No 04
22.16
21.25
16.50
16.58
No 05
24.25
22.25
17.00
16.89
No 06
23.80
21.22
15.85
17.65
No 07
22.52
20.25
16.02
17.00
No 08
23.90
23.20
16.85
15.98
No 09
24.00
23.00
15.87
16.00
No 10
23.58
22.85
15.47
17.25
Min.
19.24
20.20
15.36
15.45
Max
25.87
24.22
17.39
17.66
AVG
23.19
22.40
16.26
16.67
COMMENTS：
1. There is no any obvious help to save power for SKT II Super Screws® with
type 17 or without type 17 on drilling in torque.
2. SKT II Super Screws® have a lower drilling in torque to save drilling power
than regular deck screw. It is about 40% effort-saving.
4