Flyshop 48mm Aluminum Alloy Air Compressor Oil Level Sight Glass with Male Thread - Durable Gauge for Industrial Pneumatic Tools & Machinery Maintenance

I have a 23 year old Speedaire compressor that I bought brand new from Grainger. I kept the catalog and parts list that came with it. So when the oil sight glass cracked I went to Grainger and was told the part was discontinued. I went to Campbell Hausfeld (they made the compressor for Grainger) and had no luck getting the part. I measured the threads and came on line and found it quickly and priced fairly. So now my $1,500 compressor is back up and running.Saved my a pile of money on a sight glass for a robin air a/c machineA direct plug and play replacement. quick delivery got me back up and running. THANK YOUPerfect fir for Campbell Hausfeld 2 stage pump. Doesn't look the same but does its job.Easy to install, works greatGood luck getting a replacement site glass from Campbell Hausfeld or their referred to online replacement part company. They dont even have the correct size on file. They told me the size for compressor mdl. #HS4813 was 16mm x 1.5, (incorrect info).Correct size for that compressor and pump model # is 30mm x 1.5,This replaced part # ST191700AV ( that is if the part # they gave me is correct).This replaced the site glass on a Campbell Hausfeld Air compressor mdl. # HS4813, Pump # HS 222201AJ.80 Gallon, 175 psi, 208-230V.Hope this info helps someone else.