|
TECHNICAL BULLETIN
PLATED STEEL SELF-DRILLING FASTENERS
Type of Fastener
Self-drilling #8, #10, #12 & #14 diameters with #2, #3 and #5 points.
Type of Material
Fasteners are to be made from a good quality cold heading wire of 1022 designation. Screws
to be heat treated after cold forming to produce a Rockwell Hardness of C-38 minimum.
Type of Plating
X-Tend finish provides two layers of protection. The top seal is an effective
barrier to the environmental elements present. While the zinc layer
affords a secondary layer for even further protection. These two layers work
together to provide an exceptionally corrosion resistant coating.
Tool Selection
An electric screwgun with a variable speed of 0-2000 RPM is the suggested tool.
Recommended usage
Fastener to be used for sheet to sheet to structural applications.
PERFORMANCE TESTS
Test Results
Strength of Fastener
| |
#8 |
#10 |
#12 |
#14 |
| Minimum tensile strength |
1710 lbs. |
2150 lbs. |
2925 lbs. |
4050 lbs. |
| Minimum shear strength |
930 lbs. |
1420 lbs. |
2125 lbs. |
2825 lbs. |
| Minimum torsional strength |
48 inch lbs. |
75 inch lbs. |
120 inch lbs. |
155 inch lbs. |
(These are conservative values) |
Test Results
Pull Out Tests
To determine the tension required to remove properly drilled
screws out of steel member.
Average Pull Out Values in Lbs.
Thickness
of Steel |
Hardness of
Steel Rockwell |
#8 |
#10 |
#12 |
#14 |
| 20 gauge |
50 |
285 |
300 |
390 |
450 |
| 18 gauge |
60 |
430 |
440 |
583 |
665 |
| 16 gauge |
64 |
590 |
550 |
746 |
890 |
| 14 gauge |
64 |
760 |
780 |
1001 |
1200 |
| 12 gauge |
64 |
|
1090 |
1286 |
1610 |
| 3/16" gauge |
60 |
|
|
2678 |
3466 |
The test results shown are believed to be reliable.
However, variances in testing and actual field
conditions may alter the results. There is no
expressed or implied warranty on the test Data.
|