Code 61 Threaded 4-Bolt Flanges DMIC’s ‘FL’ series of Forged Steel 4-Bolt flanges are chosen by quality oriented Engineers & Designers for superior strength and elimination of porosity problems. DMIC stocks thousands of Forged Steel flanges in full port and reduced port versions for rapid shipment. Features Sizes from ½” through 4″, full port and one-size-reduced port models Extensive stock of “Standard” and “Companion” types in NPT & SAE Available in Stainless Steel; production leadtime may apply Includes Buna-N O-Ring, optional Viton & EPR hardware kits Model Selector FL4SU – “Standard” Code 61 Threaded 4-Bolt Flanges (with O-Ring Groove) FLRSU – “Standard” Code 61 Threaded 4-Bolt Flanges (with O-Ring Groove), One Size Reduced Port FL4SU – “Standard” Code 61 Threaded 4-Bolt Flanges (with O-Ring Groove) FLRSC – “Companion” Code 61 Threaded 4-Bolt Flanges (w/Tapped Bolt Holes), One Size Reduced Port Code 62 Threaded 4-Bolt Flanges DMIC’s ‘FH’ series of Code 62 Forged Steel 4-Bolt flanges are suitable for increasingly more prevalent applications which exceed the Code 61 specification (>3,000 PSI). Engineered with extra heavy construction and generous design factor for complete peace of mind Features Sizes from ½” through 4″, full port and one-size-reduced port models Extensive stock of “Standard” and “Companion” types Available in Stainless Steel; production leadtime may apply Metric companion model is available by special order Includes Buna-N O-Ring, optional Viton & EPR hardware kits Model Selector FH4SU – “Standard” Code 62 Threaded 4-Bolt Flanges (with O-Ring Groove) FHRSU – “Standard” Code 62 Threaded 4-Bolt Flanges (with O-Ring Groove), One Size Reduced Port FH4SC – “Companion” Code 62 Threaded 4-Bolt Flanges (w/Tapped Bolt Holes) FHRSC – “Companion” Code 62 Threaded 4-Bolt Flanges (w/Tapped Bolt Holes), One Size Reduced Port Download Code 61 Threaded PDF Download Code 62 Threaded PDF