Black O Ring Clear Plastic Oil Liquid Level Sight Glass for Air Compressor

• Material: Plastic
• Color: Clear, Black, Red
• Thread Diameter: 24mm/ 0.94"
• Overall Size: 35 x 18mm/ 1.4" x 0.7" (D*T)
• Package Content: 1 x Oil Level Sight Glass

Bought it on a hunch that it may or not fit my compressor. My old sight glass started to leak oil through the front glass seal. It was cheap enough to take the risk and I lost. It would be nice if they had given the thread size. They show 24mm dia. but not the ACTUAL thread type or size. My compressor fits now a 1/2" NPT blank plug. This item may be an oddball at 24mm and may fit a 5/8" NPT as 1/2" is too small and a 3/4" is too big. Maybe I can re tap the hole in the compressor or try to find an adapter.

One good thing the shipping was quicker than anticipated