BIG-SERT ® PROFESSIONAL THREAD REPAIR KITS OVERSIZED HOLES
BIG-SERT® OVERSIZED THREAD REPAIR KITS AND INSERTS
Used for threads which have been previously repaired and failed.
These kits will repair holes that were repaired by helicoil, perma-coil,
uni-coil, recoil or any other similar coil style insert that failed.

BIG-SERT® is a heavy wall solid bushing, easy to install with positive placement.
BIG-SERT® gives increased load protection for critical use.
BIG-SERT® will repair oversize holes which have previously been repaired.
NOTE: Bottom few internal threads are incomplete.
The install driver seats the insert and completes the bottom internal threads locking the insert in place.
This pushes the pin out to contact the threaded hole. Back out of the insert is prevented by the cam lock effect of the pin.
KIT CONTENTS:
Drill
Counterbore
Tap
Insert Driver
Five (5) Steel Inserts

BIG-SERT ® THREAD REPAIR KITS AND INSERTS

NOTE: Lengths marked in RED are the inserts supplied in the kits.
Click here: for Engineering data
INCH
METRIC
Kit Size Part No.
Inserts
Length Inches Part No.
Kit Size Part No.
Inserts
Length Inches Part No.
10-32 5032S
.187
50324
M5x0.8 5508
7.6
55081
10.0
55083
1/4-20 5420
.380
54201
.500
54203
M6x1.0 5610
9.4
56101
12.0
56103
1/4-28 5448
.380
54481
.500
54483
M8x1.25 5812
11.7
58121
16.2
58123
18.0
58125
5/16-18 5561
.480
55611
.620
55613
M8x1.0 5810
11.7
58101
5/16-24 5562
.450
55621
.620
55623
M10x1.0 5011
9.0
50111
15.0
50113
3/8-16 5381
M10x1.25 5012
14.0
50121
20.0
50123
24.5
50125
3/8-24 5382
.520
53821
.750
538123
M10x1.5 5015
9.4
50150
11.0
50157
14.0
50151
20.0
50153
24.5
50155
30.0
50159
7/16-14 5761
.600
57611
.870
57613
1.000
57615
1.250
57617
M11x1.25 5112D
30.0
51125
7/16-20 5762
.600
57621
.870
57623
M12x1.5 5215
9.2
52150
16.2
52151
24.0
52153
30.0
52155
1/2-13 5121
.480
51210
.650
51211
1.000
51213
M12x1.75 5217
12.0
52170
16.2
52171
24.0
52173
30.0
52175
1/2-20 5122
.650
51221
1.000
51223
M12x1.25 5212
9.0
52120
15.0
52121
17.5
52122
24.0
52123
30.0
52125
Optional Tool
TAP GUIDES ENSURE THAT THREADS ARE SQUARE TO SURFACE
