Glass Thread DIN 40450 for Caps and Protective Glasses (Glasg)

The DIN 40450 glass thread was a thread type for protective glasses and their associated caps. Although this standard has been withdrawn without replacement, it is still used by some manufacturers for new production. Consequently, it will take some time before the DIN 40450 glass thread completely disappears from the market. Today, glass threads are often made according to the newer standard DIN 168.

The DIN 40450 glass thread is a thread type with rounded edges. The flank angles are different for external and internal threads. The cap has a flank angle of 35°, while the glass has 50°. This design not only facilitates manufacturing and cleaning but also ensures a secure connection that can still be easily released. The thread designation for the DIN 40450 glass thread consists of the abbreviation Glasg followed by the maximum external diameter in mm, for example, Glasg 84.5.

The thread table for the DIN 40450 glass thread contains a range of dimensions. Besides a minimum and maximum diameter for both internal and external threads, the thread length is also predefined for this thread type. Also listed is the pitch for the DIN 40450 glass thread in mm. Dies and taps for the DIN 40450 glass thread can be made upon request!