Dimensions Guide
ESR-1078 
|
 Most Widely Accepted and Trusted  Page 5 of 8 
THRULOK NUT (TOP) AND 
WASHER (BOTTOM) 
TABLE 1E—FASTENER SPECIFICATIONS: TRUSSLOK-Z FASTENERS 
TRUSSLOK-Z
®
FASTENER 
DESIGNATION 
HEAD 
MARKING 
OVERALL 
LENGTH
1
(inches) 
LENGTH OF 
THREAD
2
(inches) 
UNTHREADED 
SHANK 
DIAMETER 
(inch) 
MINOR THREAD 
(ROOT) 
DIAMETER 
(inch) 
BENDING 
YIELD
3
(F
yb
, psi) 
ALLOWABLE 
FASTENER STRENGTH 
Tensile 
(lbf) 
Shear
4
(lbf) 
TSLZ278 
F2.8 
2
7
/
8
1
1
/
4
0.228 
0.202 
218,400 
1,833 
1,235 
TSLZ412 
F4.5 
4
1
/
2
TSLZ006 
F6.0 
6 
For SI: 1 inch = 25.4 mm, 1 lbf = 4.4 N, 1 psi = 6.895 kPa. 
1
For purposes of measuring overall fastener length, fasteners must be measured from the underside of head to bottom of tip. 
2
Length of thread includes tip. See detailed illustration. 
3
Bending yield strength determined per methods specified in ASTM F1575 and based on the minor thread diameter. 
4
Allowable shear strength values apply only to shearing in the unthreaded shank portion of the fastener. 
TABLE 1F—FASTENER SPECIFICATIONS: THRULOK FASTENERS
6 
THRULOK
®
FASTENER 
DESIGNATION 
HEAD 
MARKING 
OVERALL 
LENGTH
1
(inches) 
LENGTH OF 
THREAD
2,4
(inches) 
UNTHREADED 
SHANK 
DIAMETER 
(inch) 
MINOR THREAD 
(ROOT) 
DIAMETER 
(inch) 
BENDING 
YIELD
3
(F
yb
, psi) 
ALLOWABLE 
FASTENER STRENGTH 
Tensile 
(lbf) 
Shear
5
(lbf) 
A 
B 
THR614 
FT6.2 
6
1
/
4
5
/
9
1
2
/
10
0.228 
0.201 
218,400 
1,970 
1,235 
THR007 
FT7.0 
7 
THR008 
FT8.0 
8 
THR912 
FT9.5 
9
1
/
2
For SI: 1 inch = 25.4 mm, 1 lbf = 4.4 N, 1 psi = 6.895 kPa. 
1
For purposes of measuring overall fastener length, fasteners must be measured from the underside of head to bottom of tip. 
2
Length of thread includes tip. See detailed illustration. 
3
Bending yield strength determined per methods specified in ASTM F1575 and based on the minor thread 
diameter. 
4
The thread lengths given for the ThruLOK are for zones A and B, as depicted in the diagram below. 
5
Allowable shear strength values apply only to shearing in the unthreaded shank portion of the fastener. 
6
The ThruLOK fastener must be used with the ThruLOK washer and nut (supplied with the fastener). 










