FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 7. Aircraft Hardware, Control Cables, and Turnbuckles | 10. Safety Methods for Turnbuckles | 7-184. Assembling and Securing Clip-Locking Turnbuckles
9/8/98
TABLE 7-9. Locking-clip application.
NOMINAL
CABLE
DIA.
1/16
3/32
1/8
5/32
3/16
THREAD
UNF-3
No. 6-40
No. 10-32
1/4-28
5/16-24
LOCKING
CLIP
MS21256
-1
-2
-1
-2
-1
-2
-1
7/32
3/8-24
-2
1/4
9/32
7/16-20
-3
5/16
1/2-20
TURNBUCKLE
BODY MS21251
-2S
-3S
-3L
-4S
-4L
-5S
-5L
-6S
-6L
-7L
-8L
-9L
-10L
AC 43.13-1B
FIGURE 7-27. Assembling and securing clip-locking turnbuckles
7-185.7-195. [RESERVED.]
Par 7-184
Page 7-47 (and 7-48)