Threaded Plugs

The threaded plug consists of a basic plug and the respective threaded adaptor. To align the plug on the cell vent, the basic plug is able to turn on the adaptor after installation – a solution for which bfs holds the patent. All parts on the inside and the outside of the plug housing are fitted as form-locking components. This means that the plug can be disassembled and all its parts recycled at the end of its operating life.


Threaded Plug III M27 C51000

Fits all lead-acid batteries with cell-vent thread M27.

Construction height 31 mm / 1.22"
Min. casing depth 35 mm / 1.38"
Float action 4 mm / 0.16"
Filling pressure min 0,2 bar / 2.9 psi | max. 3,8 bar / 55 psi
Water volume (dynamic) with 6 plugs in series:
0,3 bar / 4.3 psi 3.49 pt / 1650 cm³ per minute
1,0 bar / 14.5 psi 7.61 pt / 3600 cm³ per minute
3,0 bar / 43.5 psi 14.27 pt / 6750 cm³ per minute

Threaded Plug IV M27 C4N000

This threaded plug has a low installation height and fits all lead-acid batteries with cell-vent thread M27.

Construction height 20 mm / 0.79"
Min. casing depth 44 mm / 1.73"
Float action 4 mm / 0.16"
Filling pressure min 0,2 bar / 2.9 psi | max. 3,8 bar / 55 psi
Water volume (dynamic) with 6 plugs in series:
0,3 bar / 4.3 psi 4.33 pt / 2050 cm³ per minute
1,0 bar / 14.5 psi 10.78 pt / 5100 cm³ per minute
3,0 bar / 43.5 psi 18.39 pt / 8700 cm³ per minute

Threaded Plug III M30 D51000

Fits all lead-acid batteries with cell-vent thread M 30 x 2.

Construction height 31 mm / 1.22"
Min. casing depth 35 mm / 1.38"
Float action 4 mm / 0.16"
Filling pressure min 0,2 bar / 2.9 psi | max. 3,8 bar / 55 psi
Water volume (dynamic) with 6 plugs in series:
0,3 bar / 4.3 psi 3.49 pt / 1650 cm³ per minute
1,0 bar / 14.5 psi 7.61 pt / 3600 cm³ per minute
3,0 bar / 43.5 psi 14.27 pt / 6750 cm³ per minute

Threaded Plug III C35 E51000

Fits all lead-acid batteries with cell-vent thread C35.

Construction height 31 mm / 1.22"
Min. casing depth 35 mm / 1.38"
Float action 4 mm / 0.16"
Filling pressure min 0,2 bar / 2.9 psi | max. 3,8 bar / 55 psi
Water volume (dynamic) with 6 plugs in series:
0,3 bar / 4.3 psi 3.49 pt / 1650 cm³ per minute
1,0 bar / 14.5 psi 7.61 pt / 3600 cm³ per minute
3,0 bar / 43.5 psi 14.27 pt / 6750 cm³ per minute

Threaded Plug III M36 F51000

Fits all lead-acid batteries with cell-vent thread M36.

Construction height 31 mm / 1.22"
Min. casing depth 35 mm / 1.38"
Float action 4 mm / 0.16"
Filling pressure min 0,2 bar / 2.9 psi | max. 3,8 bar / 55 psi
Water volume (dynamic) with 6 plugs in series:
0,3 bar / 4.3 psi 3.49 pt / 1650 cm³ per minute
1,0 bar / 14.5 psi 7.61 pt / 3600 cm³ per minute
3,0 bar / 43.5 psi 14.27 pt / 6750 cm³ per minute