TM 10-4610-241-24
TO 40W4-13-42
3-5.
THREADED INSERTS AND HELICOILS - continued
(a)
Center punch broken stud or screw.
(b)
Drill three quarters way deep into broken stud or screw using an appropriate size drill bit.
(c)
Using a screw extractor, remove broken stud or screw.
(4)
Remove studs or screws that have not broken flush to surface as follows:
(a)
Clamp broken stud or screw using vise grip pliers.
(b)
Back out broken stud or screw.
(5)
Repair threads that are damaged and cannot be restored by installing a helical coil insert. The following
gives standard procedures for installation of a helical insert and removal of a previously installed
damaged one.
c.
Install Helicoil Inserts.
NOTE
All sizes for tools and helicoils depend on original bolt size. Refer to
repair kit.
3-100
