Safety Five-Lobed Knobs EN 5337.8

Product description

Information

Safety five-lobed knobs EN 5337.8 were developed for applications where access by unauthorized personnel is not permitted.

The shape of the keyhole profile is identical to the key profile.

Furthermore, the safety five-lobed knob has been designed in such a way that it can also be used in outdoor areas.

Resistant to solvents, oils, grease and other chemical agents.

Key is not included and must be ordered separately, see Accessory.

Specification

Five-lobed knob
Plastic
Technopolymer (Polyamide PA)

Glass fiber reinforced
Temperature resistant up to 212 °F (100 °C)
Black, matte finish

Technopolymer cover flange and knob ultrasonically welded

Indexing element
Plastic
Technopolymer (POM)

Tapped insert
Brass

RoHS

Accessory

Keys for Safety Five-Lobed Knobs EN 5337.8

On request

With threaded stud
Size M10 thread available with stainless steel insert

Build & Price

Part Number	d₁	d₂	d₃	h₁	h₂	h₃	t min.

6NTFAK	1.65	M 6	0.65	1.18	0.57	0.02	0.47
8NTFAK	1.65	M 8	0.65	1.18	0.57	0.02	0.51
8NTFBK	2.17	M 8	0.75	1.30	0.59	0.04	0.51
10NTFBK	2.17	M 10	0.75	1.30	0.59	0.04	0.67

d₁	d₂	d₃	h₁	h₂	h₃	t min.

1.65	M 6	0.65	1.18	0.57	0.02	0.47
1.65	M 8	0.65	1.18	0.57	0.02	0.51
2.17	M 8	0.75	1.30	0.59	0.04	0.51
2.17	M 10	0.75	1.30	0.59	0.04	0.67

3D Product Configurator

Handle diameter d₁

1.65

2.17

Thread d₂

M 6

M 8

M 10

Function

With the key inserted into the lock (no rotation required), the knob and base hub operate together and can easily be clamped into position or loosened.

Without the key inserted into the lock, the knob can easily be clamped clockwise into position. However, loosening the knob (counter-clockwise) without the key in position is not possible, the knob head disengages from the knob base therefore, not allowing the threaded insert to release from the mating threaded shaft.