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Ideal Vacuum | ASA 4.25 / ANSI 1 Blank Flange, with O-Ring Groove, Not Bored, Not Rotatable, 4.25 in OD, 3.125 in BCD, Four 0.625 in ID Bolt Holes, 304 Stainless Steel
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Ideal Spectroscopy | ASA 6.0 / ANSI 2 Blank Flange, with O-Ring Groove, Not Bored, Not Rotatable, 6 in OD, 4.75 in BCD, Four 0.75 in ID Bolts Holes, 304 Stainless Steel
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ANSI Class 150 300 600 B16.5 RF Stopple Fitting Tdw Lock O Ring Flange - China Lock-O-Ring Flange, Stopple Flange | Made-in-China.com
![ASA 6 Inch Blank Flange with O-Ring Groove, 11 in OD, 9.5 BCD, 0.750 Hole dia, 8 | ULTRAVACUUMSOLUTIONS ASA 6 Inch Blank Flange with O-Ring Groove, 11 in OD, 9.5 BCD, 0.750 Hole dia, 8 | ULTRAVACUUMSOLUTIONS](https://static.wixstatic.com/media/85af35_78102a274cb74a17a43b9045885e7eff~mv2.jpg/v1/fit/w_500,h_500,q_90/file.jpg)