CSB2 Series CSB2-1 Ø2" Lens Tube SM2 Internal Thread Straight Tube Casing Cage Coaxial Threaded Delay Tube Optical Experiment

Optical commonly used thread size standard This is the unique thread of Thorlabs in the United States, not the commonly used optical thread. SM is the code for the thread of the sewing machine in terms of thread expression, but this company in the United States uses it to connect the internal and external threads of the optical lens and the sleeve. The nature of the thread is UNS, and the United States has a special thread with a tolerance accuracy of 2A / 2B. The special place of this thread is 40 teeth per inch regardless of the diameter.  The specific dimensions are as follows:   Parameter: (Multiple specifications are available)   Model CSB2-0.5 CSB2-1 CSB2-1.5 CSB2-2 Thread SM2 (2.035"-40) Height 0.5 inch (12.7mm) 1 inch (24.5mm) 1.5 inch (38.1mm) 2 inch (50.8mm) Diameter Ø2 inch (50.8mm) Weight 12.7g 25.6g 38.4g 51.4g Material #7075 aluminum alloy     Characteristic: ►SM2 (2.035"-40) threaded ho