TM 10-5411-235-13
DIRECT SUPPORT MAINTENANCE-GENERAL RIVNUT REMOVAL AND INSTALLATION
PROCEDURES
0029 00
Table 1. Rivnuts
Dash No.
Part no
Style
Dim A Dim D Dim L
T
Dim C
Grip Range
SM-C-563711-1
S25B151
C
0.529
0.332
1.000
-20 UNC-3B
.089-.151
SM-C-563711-2
S25B211
C
0.529
0.332
1.062
-20 UNC-3B
.151-.211
SM-C-563711-3
S25B451
C
0.529
0.332
1.312
-20 UNC-3B
.391-.451
SM-C-563711-4
S10B366
C
0.391
0.250
1.094
10-32 UNC-3B
.316-.366
SM-C-563711-5
S25B140
E
0.475
0.332
1.000
-20 UNC-3B
0.058
.080-.140
SM-C-563711-6
S8B106
C
0.355
0.221
0.687
8-32 UNC-3B
.065-.106
SM-C-563711-7
S31B350
D
0.665
0.413
1.032
5/16-18 UNC-3B
0.062
.275-.350
SM-C-563711-8
S31B125
E
0.665
0.413
1.187
5/16-18 UNC-3B
0.062
.030-.125
SM-C-563711-9
S31B481
C
0.656
0.413
1.562
5/16-18 UNC-3B
.406-.481
SM-C-563711-10
S8B201
C
0.355
0.221
0.687
8-32 UNC-3B
.161-.201
SM-C-563711-11
SS8B161
C
0.355
0.221
0.687
8-32 UNC-3B
.106-.161
SM-C-563711-12
S25B320
E
0.475
0.332
1.187
-20 UNC-3B
0.058
.260-.320
SM-C-563711-13
S31B425
E
0.665
0.413
1.531
5/16-UNC-3B
0.062
.350-.425
SM-C-563711-14
S31B350
E
0.665
0.413
1.437
5/16-18 UNC-3B
0.062
.275-.350
WARNING
Drilling creates metal chips which may enter eyes and
cause serious injury. Eye protection is required.
CAUTION
Make sure drill bit has a stop attached which will prohibit
the drill from exceeding a depth of one inch.
NOTE
Drill hole size must match size of rivnut being installed.
Quantities of sheets may be drilled at the same time when
held together with sheet fasteners.
a. Drill hole in structure.
b. Remove all metal chips and remove burrs from drilled holes.
c.
If a countersunk rivet is being installed, countersink hole using a 100-degree machine
countersink.
d. Thread stem of appropriate pull-up stud into rivnut. Stud should protrude through open end
rivnuts or be 1-1/2 threads from bottoming in closed end rivnuts.
e. Coat rivnut body with fiber filled polyester resin before installing.
f.
Insert rivnut into hole. Make sure sheets are held tightly together before pulling.
g. With pull-up stud parallel to axis of rivnut, pull up on rivnut. Exert firm pressure, but do not
buckle metal sheets.
h. Make sure fastened parts are not loose, rivnut does not rotate, and rivnut head is seated
tightly against surface. Make sure rivnut threads are in good condition. If threads are
damaged or rivnut is improperly installed, remove it and install a new one.
0029 00-3
