G - Male thread

Parallel male thread, BSP

Thread according to DIN ISO 228 spec. part 1, pipe thread G with and without sealing collar (other forms of sealing, for instance lens-seal on request)

GA

G-thread, without sealing collar, flat facing, without thread recess

D L Code A3 A7 A11 E5 S15
in
S15
out
G1/8" 12 GA 18 OK OK OK OK OK OK
G1/4" 12 GA 14 OK OK OK OK OK OK
G3/8" 16 GA 38 OK OK OK OK OK OK
G1/2" 22 GA 12 * OK OK OK OK OK OK
G5/8" 25 GA 58 *   OK OK OK OK  
G3/4" 20 GA 34   OK OK OK OK  
G1" 20 GA 01     OK      

*This connection is according DIN 19207, form R

GB

G-thread, with sealing collar, DIN 3852 part 2, form A                                                
D d b L Code A3 A7 A11 E5 S15
in
S15
out
G1/8" 14 2 8 GB 18 OK OK OK OK OK OK
G1/4" 18 2 12 GB 14 OK OK OK OK OK OK
G3/8" 22 2 12 GB 38 OK OK OK OK OK OK
G1/2" 26 2 14 GB 12   OK OK OK OK  
G5/8" 28 3 14 GB 58   OK OK OK OK  
G3/4" 32 3 16 GB 34     OK   OK  
G1" 39 3 18 GB 01     OK