Perma-Kee

Perma-Kee® inserts are solid, one piece, kee-locking inserts used to repair stripped or damaged threads in all types of metals and applications. When installed, locking-kees are driven into the surrounding parent material, locking the insert into place and keeping it from rotating due to vibration or torsion. No special taps are needed.

Perma-Kee inserts are available in carbon or stainless steel, both inch and metric series, and a variety of wall thickness – thinwall, heavy duty, extra heavy duty and solid styles.

Perma-Kee inserts are sold in bulk quantities. Installation tools sold separately.


THINWALL INSERTS

Carbon Steel Inserts
Thread Size External Thread Size
(Tap Size)
TK Part No. Drill Size Install Tool
Unified Coarse
10-24 5/16-18 PKTC-3 I PKT-3T
10-32 5/16-18 PKTF-3 I PKT-3T
1/4-20 3/8-16 PKTC-4 Q PKT-4T
1/4-28 3/8-16 PKTF-4 Q PKT-4T
5/16-18 7/16-14 PKTC-5 X PKT-5T
5/16-24 7/16-14 PKTF-5 X PKT-5T
3/8-16 1/2-13 PKTC-6 29/64 PKT-6T
3/8-24 1/2-13 PKTF-6 29/64 PKT-6T
7/16-14 9/16-12 PKTC-7 33/64 PKT-7T
7/16-20 9/16-12 PKTF-7 33/64 PKT-7T
1/2-13 5/8-11 PKTC-8 37/64 PKT-8T
1/2-20 5/8-11 PKTF-8 37/64 PKT-8T
Metric
M5x8 M8X1.25 PKTM-5X.8 6.9 PKTM-5T
M6x1 M10X1.25 PKTM-6X1 8.8 PKTM-6T
M8x1 M12X1.25 PKTM-8X1 10.8 PKTM-8T
M8x1.25 M12X1.25 PKTM-8X1.25 10.8 PKTM-8T
M10x1.25 M14X1.5 PKTM-10X1.25 12.8 PKTM-10T
M10x1.5 M14X1.5 PKTM-10X1.5 12.8 PKTM-10T
M12x1.25 M16X1.5 PKTM-12X1.25 14.75 PKTM-12T
M12x1.75 M16X1.5 PKTM-12X1.75 14.75 PKTM-12T
  1. For Stainless Steel, Contact Thread Kits Company.

HEAVY DUTY INSERTS

Carbon Steel Inserts
Thread Size External Thread Size
(Tap Size)
TK Part No. Drill Size Install Tool
Unified Coarse
8-32 5/16-18 PKHC-2 PKH-2T
10-24 3/8-16 PKHC-3 Q PKH-3T
10-32 3/8-16 PKHF-3 Q PKH-3T
1/4-20 7/16-14 PKHC-4 X PKH-4T
1/4-28 7/16-14 PKHF-4 X PKH-4T
5/16-18 1/2-13 PKHC-5 29/64 PKH-5T
5/16-24 1/2-13 PKHF-5 29/64 PKH-5T
3/8-16 9/16-12 PKHC-6 33/64 PKH-6T
3/8-24 9/16-12 PKHF-6 33/64 PKH-6T
7/16-14 5/8-11 PKHC-7 37/64 PKH-7T
7/16-20 5/8-11 PKHF-7 37/64 PKH-7T
1/2-13 3/4-16 PKHC-8 45/64 PKH-8T
1/2-20 3/4-16 PKHF-8 45/64 PKH-8T
9/16-12 3/4-16 PKHC-9 45/64 PKH-9T
9/16-18 3/4-16 PKHF-9 45/64 PKH-9T
5/8-11 7/8-14 PKHC-10 53/64 PKH-10T
5/8-18 7/8-14 PKHF-10 53/64 PKH-10T
3/4-10 1 1/8-12 PKHC-12 1 1/16 PKH-12T
3/4-16 1 1/8-12 PKHF-12 1 1/16 PKH-12T
7/8-9 1 1/4-12 PKHC-14 1 3/16 PKH-14T
7/8-14 1 1/4-12 PKHF-14 1 3/16 PKH-14T
1-8 1 3/8-12 PKHC-16 1 5/16 PKH-16T
1-12 1 3/8-12 PKHF-16 1 5/16 PKH-16T
Metric Sizes
M4X0.7 M8X1.25 PKHM-4X.7 6.90 PKHM-4T
M5X0.8 M10X1.25 PKHM-5X.8 8.80 PKHM-5T
M6X1 M12X1.25 PKHM-6X1 10.80 PKHM-6T
M8X1 M14X1.5 PKHM-8X1 12.80 PKHM-8T
M8X1.25 M14X1.5 PKHM-8X1.25 12.80 PKHM-8T
M10X1.25 M16X1.5 PKHM-10X1.25 14.75 PKHM-10T
M10X1.5 M16X1.5 PKHM-10X1.5 14.75 PKHM-10T
M12X1.25 M18X1.5 PKHM-12X1.25 16.75 PKHM-12T
M12X1.75 M18X1.5 PKHM-12X1.75 16.75 PKHM-12T
M14X1.5 M20X1.5 PKHM-14X1.5 18.75 PKHM-14T
M14X2 M20X1.5 PKHM-14X2 18.75 PKHM-14T
M16X1.5 M22X1.5 PKHM-16X1.5 20.50 PKHM-16T
M16X2 M22X1.5 PKHM-16X2 20.50 PKHM-16T
M18X1.5 M24X1.5 PKHM-18X1.5 22.50 PKHM-18T
M20X1.5 M30X2 PKHM-20X1.5 28.00 PKHM-20T
M20X2.5 M30X2 PKHM-20X2.5 28.00 PKHM-20T
M22X1.5 M32X2 PKHM-22X1.5 30.00 PKHM-22T
M24X2 M33X2 PKHM-24X2 31.00 PKHM-24T
M24X3 M33X2 PKHM-24X3 31.00 PKHM-24T
  1. For Stainless Steel, Contact Thread Kits Company.