Qualities: AISI-304 Y AISI-316. Threads depending on ISO 7/1 (DIN 2999).

Manufacturing measures
L D
3/8 - 1/4 27 22
1/2 - 1/4 28 27
1/2 - 3/8 29 27
3/4 - 3/8 34 32
3/4 - 1/2 35 32
1" - 1/2 36 40
1" - 3/4 37 40