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.

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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

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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

.18750324

M5x0.8    5508

7.655081

10.055083

1/4-20        5420

.38054201

.50054203

M6x1.0     5610

  9.456101

12.056103

 1/4-28        5448

.38054481

.50054483

M8x1.25    5812

11.758121

16.258123

18.058125

5/16-18        5561

.48055611

.62055613

M8x1.0    5810

11.758101

5/16-24        5562

.45055621

.62055623

M10x1.0     5011

9.050111

15.050113

3/8-16        5381

.40053810

.52053811

.750538131

1.00053815

1.25053817

M10x1.25     5012

14.050121

20.050123

24.550125

3/8-24       5382

.52053821

.750538123

M10x1.5     5015

9.450150

11.050157

14.050151

20.050153

24.550155

30.050159

7/16-14        5761

.60057611

.87057613

1.00057615

1.25057617

M11x1.25       5112D

Not for Deep Holes Notes

30.051125

7/16-20        5762

.60057621

.87057623

M12x1.5       5215

9.252150

16.252151

24.052153

30.052155

1/2-13        5121

.48051210

.65051211

1.00051213

M12x1.75      5217

12.052170

16.252171

24.052173

30.052175

1/2-20        5122

.65051221

1.00051223

M12x1.25      5212

9.052120

15.052121

17.552122

24.052123

30.052125

Optional Tool

TAP GUIDES ENSURE THAT THREADS ARE SQUARE TO SURFACE

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The lower portion of the tap guide should remain as square as possible to the engine surface.
Turn the tap slowly while making sure the guide remains flush.

TAP GUIDES

INCH SIZE PART NO.
1/4-20 75405
1/4-28 75405
5/16-18 75515
5/16-24 75515
3/8-16 75315
3/8-24 75315
7/16-14 57655
7/16-20 57655
1/2-13 75115
1/2-20 75115

METRIC SIZE PART NO.
M6x1.0 75605
M8x1.25 75825
M10x1.0 75025
M10x1.25 75025
M10x1.5 75025
M12x1.25 75255
M12x1.5 75255
M12x1.75 75255