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KATO Locking Torque Values for Tangless and Tanged CoilThread Inserts
   
  Unified Thread Sizes Metric Tread Sizes
 
Nominal
Thread
Size		 Maximum Locking Torque Minimum Locking Torque 15th Cycle
Unified Coarse
2-56 20.0 oz-in 3.0 oz-in
3-48 32.0 oz-in 7.0 oz-in
4-40 48.0 oz-in 10.0 oz-in
5-40 75.0 oz-in 13.0 oz-in
6-32 6.0 lbf-in 1.0 lbf-in
8-32 9.0 lbf-in 1.5 lbf-in
10-24 13.0 lbf-in 2.0 lbf-in
12-24 24.0 lbf-in 3.0 lbf-in
1/4-20 30.0 lbf-in 4.5 lbf-in
5/16-18 60.0 lbf-in 7.5 lbf-in
3/8-16 80.0 lbf-in 12.0 lbf-in
7/16-14 100.0 lbf-in 16.5 lbf-in
1/2-13 150.0 lbf-in 24.0 lbf-in
9/16-12 200.0 lbf-in 30.0 lbf-in
5/8-11 300.0 lbf-in 40.0 lbf-in
3/4-10 400.0 lbf-in 60.0 lbf-in
7/8-9 600.0 lbf-in 82.0 lbf-in
1-8 800.0 lbf-in 110.0 lbf-in
1 1/8-7 900.0 lbf-in 137.0 lbf-in
1 1/4-7 1000.0 lbf-in 165.0 lbf-in
1 3/8-6 1150.0 lbf-in 185.0 lbf-in
1 1/2-6 1350.0 lbf-in 210.0 lbf-in
Unified Fine
3-56 32.0 oz-in 7.0 oz-in
4-48 48.0 oz-in 10.0 oz-in
6-40 6.0 lbf-in 1.0 lbf-in
8-36 9.0 lbf-in 1.5 lbf-in
10-32 13.0 lbf-in 2.0 lbf-in
1/4-28 30.0 lbf-in 3.5 lbf-in
5/16-24 60.0 lbf-in 6.5 lbf-in
3/8-24 80.0 lbf-in 9.5 lbf-in
7/16-20 100.0 lbf-in 14.0 lbf-in
1/2-20 150.0 lbf-in 18.0 lbf-in
9/16-18 200.0 lbf-in 24.0 lbf-in
5/8-18 300.0 lbf-in 32.0 lbf-in
3/4-16 400.0 lbf-in 50.0 lbf-in
7/8-14 600.0 lbf-in 70.0 lbf-in
1-12 800.0 lbf-in 90.0 lbf-in
1 1/8-12 900.0 lbf-in 117.0 lbf-in
1 1/4-12 1000.0 lbf-in 143.0 lbf-in
1 3/8-12 1150.0 lbf-in 165.0 lbf-in
1 1/2-12 1350.0 lbf-in 190.0 lbf-in

 
Nominal
Thread
Size		 Maximum Locking Torque Minimum Locking Torque 15th Cycle
Metric Coarse Series
M2.2X0.45 0.14 N.m 0.02 N.m
M2.5X0.45 0.23 N.m 0.05 N.m
M3X0.5 0.45 N.m 0.10 N.m
M3.5X0.6 0.68 N.m 0.12 N.m
M4X0.7 0.90 N.m 0.15 N.m
M5X0.8 1.60 N.m 0.30 N.m
M6X1 3.00 N.m 0.40 N.m
M7X1 4.50 N.m 0.60 N.m
M8X1.25 6.00 N.m 0.80 N.m
M10X1.5 10.50 N.m 1.40 N.m
M12X1.75 15.50 N.m 2.10 N.m
M14X2 23.50 N.m 3.00 N.m
M16X2 31.50 N.m 4.20 N.m
M18X2.5 42.00 N.m 5.50 N.m
M20X2.5 54.00 N.m 7.00 N.m
M22X2.5 67.50 N.m 9.00 N.m
M24X3 80.00 N.m 10.50 N.m
M27X3 94.00 N.m 12.00 N.m
M30X3.5 108.00 N.m 14.00 N.m
M33X3.5 122.00 N.m 15.50 N.m
M36X4 136.00 N.m 17.50 N.m
M30X4 150.00 N.m 19.50 N.m
Metric Fine Series
M8X1 6.00 N.m 0.80 N.m
M10X1 10.50 N.m 1.40 N.m
M10X1.25* 10.50 N.m 1.40 N.m
M12X1.25* 15.50 N.m 2.10 N.m
M12X1.5* 15.50 N.m 2.10 N.m
M14X1.5* 23.50 N.m 3.00 N.m
M16X1.5* 31.50 N.m 4.20 N.m
M18X1.5* 42.00 N.m 5.50 N.m
M20X1.5* 54.00 N.m 7.00 N.m
M22X1.5* 67.50 N.m 9.00 N.m
M18X2 42.00 N.m 5.50 N.m
M20X2 54.00 N.m 7.00 N.m
M22X2 67.50 N.m 9.00 N.m
M24X2 80.00 N.m 10.50 N.m
M27X2 94.00 N.m 12.00 N.m
M30X2 108.00 N.m 14.00 N.m
M33X2 122.00 N.m 15.50 N.m
M36X2 136.00 N.m 17.50 N.m
M39X2 150.00 N.m 19.50 N.m
M36X3 136.00 N.m 17.50 N.m
M39X3 150.00 N.m 19.50 N.m

 
  Notes:
 
  1. Unified CoilThread locking inserts conform to NASM21209, when tested in accordance to NASM8846.
  2. Metric CoilThread locking inserts conform to MA3329-MA3331, when tested in accordance to MA1565.
  3. Unified Tangless locking inserts conform to NAS1130, when tested in accordance to NASM8846.