Hardware & Tools

keensert threaded insert have less attrition.A multiple tightenting and lossening of the bolt is possible.locking inserts include a dry film lubrication on the surface to protect the screw from galling.
keensert threaded insert have a positive lock against rotation and vibration.
keensert threadeed insert have 2 and 4 pre-assembled kees depending on the diameter.after installation of the kees into the parent material the assembly is form-closed.No check with a thread gauge according to the DIN standard possible in the area of the kees.
Pull-out-strength for Keensert calculation as follows:
pull-out-strength(N)=shear engagement (mm2)x ultimate shear strength of parent material (N/mm2)
data for shear engagement see installation data.


type size inner(6H) outer(6g) length drill

min M2 M2*0.4 M4*0.7 3 3.4
M2.5 M2.5*0.45 M4.5*0.75 3.8 3.9
M3 M3*0.5 M5*0.8 4.2 4.4
M4 M4*0.7 M6*0.75 5.2 5.5

thinwall M5 M5*0.8 M8*1.25 8 6.9
M6 M6*1 M10*1.25 10 8.8
M8 M8*1.25 M12*1.25 12 10.8
M10 M10*1.5 M14*1.5 14 12.8
M12 M12*1.75 M16*1.5 16 14.8


heavy duty M4 M4*0.7 M8*1.25 8 6.9
M5 M5*0.8 M10*1.25 10 8.8
M6 M6*1 M12*1.25 12 10.8
M8 M8*1.25 M14*1.5 14 12.8
M10 M10*1.5 M16*1.5 16 14.8
M12 M12*1.75 M18*1.5 18 16.8


type size inner(2B) outer(2A) length drill

min 2-56 2-56 8-32 0.12 0.134
4-40 4-40 10-32 0.17 0.161
6-32 6-32 12-28 0.17 0.187
8-32 8-32 1/4-28 0.22 0.228


thinwall 10-32(10-24) 10-32(10-24) 5/16-18 0.31 0.272
1/4-20(1/4-28) 1/4-20(1/4-28) 3/8-16 0.37 0.332
5/16-18(5/16-24) 5/16-18(5/16-24) 7/16-14 0.43 0.397
3/8-16(3/8-24) 3/8-16(3/8-24) 1/2-13 0.50 0.453
7/16-20(7/16-14) 7/16-20(7/16-14) 9/16-12 0.56 0.516
1/2-13(1/2-20) 1/2-13(1/2-20) 5/8-11 0.62 0.5