Distributore BUMAX ITALIA
Viti Bulloni Alta Resistenza Meccanica

VITI CAVA ESAGONALE ANSI B 18.3 – Bumax 88



Thread

d M3 M4 M5 M6 M8
Pitch of thread 0.5 0.7 0.8 1 1.25
dk 5.6 8 9.5 12 16
k (max.) 2.4 3.1 3.7 4.6 6
Torx no. T10 T20 T25 T30 T45

Screw length | Approximate weight per 100

inch mm kg kg kg kg kg kg kg kg
1/2 13 0.50 0.9
5/8 16 0.58 1.0
3/4 19 0.62 1.1 1.07
7/8 22 1.1 1.9
1 25 0.73 1.2 2.0 4.1
1.1/4 32 0.86 1.3 2.1 4.8 8.2
1.1/2 38 1.0 1.6 2.5 5.2 9.0
1.3/4 45
2 51 2.1 3.2 6.2 11 17 26 37
2.1/4 57 12
2.1/2 64 4.0 20
2.3/4 70
3 76 8.2 23 32 46
3.1/4 83
3.1/2 89
4 102 40 56
Null type 0.32 0.47 0.69 1.6 3.2 5.3 9.2 14

Sample order: Screws above the stepped line are fully-threaded, while screws below the line are usuallysupplied partially-threaded with a thread engagement length as above. However we reserve the right, at our discretion, to supply all lengths in a fully-threaded design.

Packaging

Diameter 1/4 5/16 3/8 1/2 5/8 3/4 7/8 1
No. per pack 100 50 50 25 25 10 10 10