Technical Specifications

Fasteners
29
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LL LumberLok Structural Connector Screws
LL915
The LumberLok Structural Connector Screw is a self-drilling screw
that can be used with a number of USP Structural Connectors and
also for wood-to-wood applications. The screws feature a T20 Torx
®
head with integral washer and gimlet point for ease of installation.
The twin-lead threads drive in twice as fast as the single lead
threads signicantly reducing installation time. The USP head stamp
identies the screw length for easy inspection.
Screw shear capacities are based on a diameter of 0.162" when the
shear plane is on the screw shoulder (SH) and 0.109" when the shear
plane is on the threads (T). USP LumberLok Structural Connector
Screws have a bending yield strength of 180,000 psi.
Materials: Low carbon hardened steel.
Finish: Gold Coat
Codes: See page 11 for Code Reference Key Chart
Installation:
• Screws are self-drilling.
• Install using a low speed clutch drill with T20 Torx
®
bit (not
included). The washer head should be at to the surface. Do
not over-tighten the screws.
• Installing the screw at an angle may introduce additional bending
and tension forces into the fastener if the screw head is not at to
the bearing surface. Care should be given to ensure the fastener is
installed perpendicular to the plane of the fastener hole.
• Impact drills are not recommended for use with
LumberLok Screws
Size
Ref. No.
LSHT
Finish
1
18 Ga 16 Ga 18 Ga 16 Ga
#9 x 1-3/8 LL915 SD9112 1-3/8 1/4 1-1/8 GC - - 121 105 131 - - 96 113 104
#9 x 2-7/8 LL930 SD9212 2-7/8 1-3/8 1-1/2 GC 104 146 176 163 100 128 147 138
1
)
GC = Gold Coat over Clear Zinc Trivalent.
2
)
Allowable shear loads assume a side
p
late tensile stren
g
th of 45 ksi.
3
)
Withdrawal loads for steel-to-wood connections assume a side
p
late thickness of 1/4" or less.
4
)
Shear loads for wood-to-wood connections assume a side member thickness of 1-1/2".
5
)
Loads are for 100% duration of load factors and ma
y
be increased for other duration factors in accordance with the NDS.
130
S-P-F Allowable Shear (Lbs.)
2,3,4,5
Steel-to-Wood Steel-to-Wood
Code
Ref.
Withdrawal
Capacity
Wood-
to-
Wood
USP
Stock No.
Dimensions (in.)
DF/SP Allowable Shear (Lbs.)
2,3,4,5
Withdrawal
Capacity
Wood-
to-
Wood
USP
name
Twin-lead
threads
Sharp Gimlet
point
T20 Torx
®
head
Screw
length
SH
L
T
LL930
Fasteners