b'STEEL O-RING FACE SEAL ADAPTERS(BUNA-N O-RING STANDARD)BUNA-NO-RING LOCKFace Seal NUTSteel O-Ring Face Seal Fittings (ORFS):Steel O-ring face seal adapter fittings usePART No.ORFSDIA. PART No. ORFSa straight thread and have a machinedS3931R-49/16 - 18.301 S3931N-49/16 - 18 groove in the face of the male fitting toS3931R-611/16 - 16.364 S3931N-611/16 - 16accept an O-ring (of either Buna N or VitonS3931R-813/16 - 16.489 S3931N-813/16 - 16material). This O-ring is compressed againstS3931R-101 - 14.614 S3931N-10 1 - 14the flat face of the female fitting for a leakS3931R-121-3/16 - 12.739 S3931N-121-3/16 - 12proof connection, and offers excellent leakS3931R-161-7/16 - 12 926 S3931N-161-7/16 - 12.protection at high pressures. S3931R-201-11/16 - 121.176 STEEL FLARELESS ADAPTERSTUBE CONNECTOR 90 ELBOWSLEEVE Tube To Tube ToFemale Pipe TubePART No.Tube S6760-41/4 S6760-63/8 S6760-81/2PART No.TubePipe PART No.Tube S6760-105/8 S6766-4A 1/41/8 S6765-4 1/4S6760-123/4 S6766-4B 1/41/4 S6765-6 3/8 S6760-161 S6766-6B 3/81/4 S6765-8 1/2S6766-6C 3/83/8S6766-8C 1/23/8S6766-10D5/81/2S6766-12E3/43/4S6766-16H11TUBE 90 ELBOWNUT Tube ToPART No.TubeMale PipeS6761-41/4PART No.TubePipeS6761-63/8 S6769-4A 1/41/8S6761-81/2 S6769-4B 1/41/4S6761-105/8 CONNECTOR S6769-6B3/81/4S6761-123/4S6761-161 Tube To S6769-6C3/83/8Male Pipe S6769-8C1/23/8S6769-8D1/21/2S6769-10D5/81/2S6769-12E3/43/4PART No.TubePipeS6768-4A1/41/8S6768-4B1/41/4S6768-6B3/81/4UNION S6768-6C3/83/8Tube To S6768-8C1/23/8Tube S6768-8D 1/21/2S6768-10D 5/81/2 TEEPART No.TubeS6768-12D 3/41/2 TubeS6762-33/16S6768-12E 3/43/4 Three EndsS6762-41/4S6768-16H11S6762-63/8PART No.TubeS6762-81/2S6764-4 1/4 S6762-105/8S6764-6 3/8 S6762-123/4S6764-8 1/2S6762-161 S6764-105/88282'