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GN 3664 Torque Limiting Three-Lobed Knob Screws


GN 3664 Torque Limiting Three-Lobed Knob Screws

Product description


Torque limiting three-lobed knob screws GN 3664 are used when the manually applied torque is to be limited.

When turned clockwise, the torque mechanical system of the knurled knob triggers an „over-engagement“ as soon as the specified torque is reached. When turning counterclockwise, the mechanical system locks such that the torque is not limited. For example, when tightening, this will ensure that the maximum permissible torque is not exceeded. On the other hand, the torque necessary for releasing will always be transferred reliably.


Technopolymer (Polyamide PA-HP)
Glass fiber reinforced, black matte

Torque limiting mechanism
Steel, hardened

Other parts
Steel, blackened

Plastic, light gray


On request

Other dimensions of threaded studs analog GN 300
Other inserts with special threaded studs analog GN 306
Other torques
Torque limiting turning counterclockwise or turning counterclockwise and clockwise

Technical drawing

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GN 3664 Torque Limiting Three-Lobed Knob Screws sketch

Article options / Table

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d1d4Length ld5d6h1h2Torque ±10%
in Nm
50M 8162025324013,523,641,610,7234
50M 10202532405013,523,641,610,7234
63M 825324050631628,146,612,93.244.7
63M 1025324050631628,146,612,93.244.7
80M 1025324050631934,156,216,845.57.5
80M 1225324050631934,156,216,845.57.5

Build & Price

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Thread d4
Length l
Torque in Nm

Selected Part (How to order)

Total (net)
plus VAT 5,34 €
gross 33,42 €
In stock
Weight: 0,071 kg
If this article is new in our product range, it may happen that details concerning weight are as yet not listed.
If you do need weight details, please contact our Sales Department!
Phone +49 7723 6507 - 0
RoHS: Yes
This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/EU), for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances).
Please note our order discounts.
With a total value (net) per order:
from 175,00 € -> 10 % discount
from 275,00 € -> 20 % discount
from 375,00 € -> 30 % discount

Surcharge for small volume purchases:
-> 15,00 Euro
for value of goods less than 25,00 €
-> 10,00 Euro
for value of goods from 25,00 to 49,99 €
All prices in accordance with our price list No. 55, valid from 1 September 2022, plus VAT only valid for Germany.

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