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GN 21b
Central Screws
Steel, for Aluminum Profiles (b-Modular System)
Description
Specification
Type
- Type A: Without cover cap
Steel, zinc plated, blue passivated SZ
Information
Central screws GN 21b connect aluminum profiles at right angles. Only one profile has to be machined. The thread in the end face profile hole is formed by the central screw itself. The self-forming thread should be lubricated to simplify assembly.
Assembly Instructions / Profile Machining

GN 21b
n | d1 Self-forming thread | l1 | d2 ≈ | d3 | l2 ≈ | A/F | Tightening torque in Nm |
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Code | Actions | |||||||||
GN 21b-8S825-A-SZ | 8 | S 8 | 25 | 16 | 7.8 | 4.5 | T40 | 25 | 12 |
|
GN 21b-10S1230-A-SZ | 10 | S 12 | 30 | 19 | 9.8 | 6 | T50 | 35 | 26 |
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