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BaerFix® thread inserts - minimum wall thickness

Calculations of the minimum values

d = Inner diameter of thread insert
D = Outer diameter of thread insert
R = Minimum wall thickness

Rmin(light metal) = 0.2 x D
Rmin(cast iron) = 0.3 x D
Rmin(plastic) = 0.25 x D

Sketch of a threaded bush from above to explain the dimensions
BaerFix® thread inserts with cutting slotsBaerFix® thread inserts with tapping holes
Light metal mmCast iron mmPlastics mmLight metal mmCast iron mmPlastics mm
M 2 x 0,40,901,351,13
M 2.5 x 0.450,901,351,13
M 3 x 0.51,001,501,251,001,501,25
M 4 x 0.71,301,951,631,301,951,63
M 5 x 0.81,602,402,001,602,402,00
M 6 x 12,003,002,502,003,002,50
M 8 x 1.252,403,603,002,403,603,00
M 10 x 1,52,804,203,50
M 12 x 1,753,204,804,00
M 14 x 23,605,404,50
M 16 x 24,006,005,00
M 18 x 2,54,406,605,50
M 20 x 2,55,207,806,50
M 22 x 2,55,207,806,50
M 24 x 36,009,007,50
M 27 x 36,8010,208,50
M 30 x 3,57,2010,809,00

BaerFix® thread inserts with
cutting slots

Threaded bush with cutting slot with sketch of the cross section

BaerFix® thread inserts with
tapping holes

Threaded bush with cutting hole with sketch of the cross section

BaerFix® Minimum drilling depths

BaerFix® thread inserts with cutting slot
Internal threadMin. drilling depth
for through hole mm		Min. drilling depth
for blind hole mm
M 2 x 0.46,008,00
M 2.5 x 0.456,008,00
M 3 x 0,56,008,00
M 4 x 0,78,0010,00
M 5 x 0,810,0013,00
M 6 x 114,0017,00
M 8 x 1,2515,0018,00
M 10 x 1,518,0022,00
M 12 x 1,7522,0026,00
M 14 x 224,0028,00
M 16 x 222,0027,00
M 18 x 2,524,0029,00
M 20 x 2,527,0032,00
M 22 x 2,530,0036,00
M 24 x 330,0036,00
M 27 x 330,0036,00
M 30 x 3,540,0046,00
BaerFix® thread inserts with cutting slot
Internal threadMin. drilling depth
for through hole mm		Min. drilling depth
for blind hole mm
UNC No 4 x 406,008,00
UNC No 6 x 328,0010,00
UNC No 8 x 328,0010,00
UNC No 10 x 2410,0013,00
UNC 1/4 x 2014,0017,00
UNC 5/16 x 1815,0018,00
UNC 3/8 x 1618,0022,00
UNC 7/16 x 1422,0026,00
UNC 1/2 x 1322,0028,00
UNC 5/8 x 1122,0027,00
BaerFix® thread inserts with tapped holes
Internal threadMin. drilling depth
for through hole mm		Min. drilling depth
for blind hole mm
M 3 x 0.54,006,00
M 4 x 0.76,008,00
M 5 x 0,87,009,00
M 6 x 18,0010,00
M 8 x 1,259,0011,00
BaerFix® thread inserts with cutting slot
Internal threadMin. drilling depth
for through hole mm		Min. drilling depth
for blind hole mm
UNF No 4 x 486,008,00
UNF No 6 x 408,0010,00
UNF No 8 x 368,0010,00
UNF No 10 x 3210,0013,00
UNF 1/4 x 2814,0017,00
UNF 5/16 x 2415,0018,00
UNF 3/8 x 2418,0022,00
UNF 7/16 x 2022,0026,00
UNF 1/2 x 2022,0028,00
UNF 5/8 x 1822,0027,00