Refer to the AR-A/AR-B/AR-D series catalog excerpt, which has been reproduced below.
The part numbers of standard AR20 to AR60 round type pressure gauges are “G36-10-01” and “G46-10-01”(for the R thread type).
For example, the part number of the AR30-03BG-A pressure gauge is “G36-10-01.”
AR10-A: Rc1/16
AR20-A to AR40-A, AR20(K)-B to AR60(K)-B, and AR20(K)-D to AR40(K)-D: Rc1/8
Old AR10: Rc1/16
Old AR20(K) to AR30(K): Rc1/8
Old AR40(K) to AR60(K): Rc1/4
Old AR1000: Rc1/16
Old AR2000 to AR3000: Rc1/8
Old AR4000 to AR6000: Rc1/4
AR10-A: Rc1/16
AR20-A to AR40-A, AR20(K)-B to AR60(K)-B, and AR20(K)-D to AR40(K)-D: Rc1/8
Old AR10: Rc1/16
Old AR20(K) to AR30(K): Rc1/8
Old AR40(K) to AR60(K): Rc1/4
Old AR1000: Rc1/16
Old AR2000 to AR3000: Rc1/8
Old AR4000 to AR6000: Rc1/4
Options include a mounting bracket and set nuts for panel mounting, and a pressure gauge.
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 1/4, Accessory: E+H, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 1/4, Accessory: None, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 1/4, Accessory: B+G, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 1/4, Accessory: Round Pressure Gauge, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 3/8, Accessory: B+E, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 3/8, Accessory: B+G, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 3/8, Accessory: Square Recessed Pressure Gauge, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 3/8, Accessory: Round Pressure Gauge, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 3/8, Accessory: G+H, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 3/8, Accessory: E+H, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 1/4, Accessory: B+E, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 1/4, Accessory: G+H, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 1/4, Accessory: Panel Mount w/Set Nut, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 1/4, Accessory: Digital Pressure Switch PNP Output/Electrical Entry:Wiring Top Entry, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 1/4, Accessory: Digital Pressure Switch NPN Output/Electrical Entry:Wiring Bottom Entry, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F
Size: 3/8, Reverse Flow: Regulator, Standard, Thread: NPT, Port Size: 3/8, Accessory: Panel Mount w/Set Nut, Option 1: 0.02~0.2MPa Setting, Option 2: Name Plate & Pressure Gauge in Imperial Units, PSI, °F