Self-clinching stud BBH

Pressure stud threaded in galvanized steel and stainless steel.

Thread size
B ±0.4
Minimum thickness sheet
Min. distance C/L of hole to sheet edge
hole size in sheet +0.08
/-0.0
Max nut tightening (Nm)
Installation force
(1) sheet thickness 1.5 mm
(2) sheet thickness 2.3 mm (kN)
M3
4.6
1.0
5.6
3.0
0.80
15.5 (1)
M4
5.9
1.0
7.0
4.0
1.80
26.01 (1)
M5
6.5
1.0
7.0
5.0
3.50
29.0 (1)
M6
8.2
1.5
8.0
6.0
6.00
42.0 (2)
M8
9.6
2.4
9.6
8.0
13.60
44.0 (2)

Thtead size
Tooling (mm)
F +0.1
D +0.1
M3
3.61
3.00
M4
4.60
4.00
M5
5.62
5.00
M6
6.70
6.00
M8
9.10
8.00


Matrix required for all threading measurements from M3 to M5 included, when the sheet thickness is less than 1.5 mm and also for M6 if sheet thickness is less than 2.4 mm.

Matrix required for all threading measurements from M3 to M5 included, when the sheet thickness is greater than 1.5 mm and also for M6 and M8 if sheet thickness is greater than 2.4 mm.

The BBH self-gripping pin is used in processing thin sheet metal, for thicknesses between approximately 1.0 and 3.0 mm.
The method is based on the viscous sliding of the metal walls of the hole in the sheet (punched holes are preferable) which create, during installation, a coupling ring around a special groove located beneath the pin head.
This characteristic is also used to give resistance to torsion.
Assembly on the hole made on the sheet is done by creating a gradual mechanical pressure on the pin, in contact with the sheet itself.
The sheet thickness and hole precision on the sheet (compare chart) are necessary for proper assembly.
Sheet hardness must be equal or less than 70 Rockwells B.

NOTE
Technical data references are nominal and based on specific procedures . Application methods and dimensional differences of support holes and the alloys used may change the levels. Performance must be tested prior to use of product.



BRAGLIA EQUIPMENT srl • viale Legioni Romane, 7/9 • 20147 Milano • tel. 02/48712676 • fax 02/48715898

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