3Way 2 Stem Manifold Medium Pressure 1/4 (6.35) 20,000 (1380).31 Vee Reg 20SM4071 20SM4081 20SM4072 20SM4082 20SM4073 20SM4083 20SM4074 20SM4084 20SM4872 20SM4882 20SM4075 20SM4085 3/8 (9.53) 20,000 (1380).75 Vee Reg 20SM6071 20SM6081 20SM6072 20SM6082 20SM6073 20SM6083 20SM6074 20SM6084 SAESTRAIGHT THREAD PORT DIMENSIONS. SAE information is provided as an aid to designers. For complete specifications refer to SAE Standards J1926-1 for straight thread ports and J518 Parts 1 and 2 for 4-bolt flange ports. CAVITY. SIZE CODE. TheseAmerican Standard taps usually produced according to class of fit: 2B, we also can produce according to 1B or 3B fully according to clients’ requirements. Usually the 3/4″-16 UNF thread taps are bright without special coating, if clients need, we also can add special coatings, for example: TiN, TiCN, CrN or TiAlN. 38 - 16 UNC : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more * Permisable values for thread Class 2B # Description Value (Inch) VValue (mm) D 1: Minor Diameter: 0.307 - 0.321: 7.798 - 8.153: D 2: (UNC/UNF/UNEF) National Pipe (NPT) Dryseal Pipe (BPTF 13/4 - 20 20-UN : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more 0.16: Tap Drill Size (75% depth) 1.701: 43.21: Lead Angle (Single Start) 1 3/4 - 20 20-UN 2B (Internal) * Permisable values for thread Class 2B # Description Value (Inch) VValue (mm) D 1: UNEFThread (USA) UNF Thread (USA) UNM Thread (USA) UNR Thread (USA) UNS Thread (USA) 8-UN Thread (USA) 12-UN Thread (USA) 16-UN Thread (USA) 20-UN Thread (USA) 1 3/4" - 16-UN: 1.7500: 44.450: 43.000: 16: 1.587: 1 13/16" - 16-UN: 1.8125: 46.037: 44.500: 16: 1.587: 1 7/8" - 16-UN: 1.8750: 47.625: 46.100: 16: 1.587: 1 15/16" - 16 15/8 - 12 12-UN : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more. Internal Threads. 2B, 3B. 1 5/8 - 12 12-UN 2A (External) * Permisable values for thread Class 2A # (UNC/UNF/UNEF) National Pipe (NPT) Dryseal Pipe (BPTF) British Pipe (BSP) ACME; Overwire measurements. 9/16 - 18 UNFPossible Thread Classes. External Threads. 2A, 3A. Internal Threads. 2B, 3B. 9/16 - 18 UNF 2A (External) * Permisable values for thread Class 2A. * Values are calculated for Length of engagement of 5xPitch. For calculations of different engagement length use the Thread Calculator' axQMQm.

3 4 16 unf 2b thread dimensions