1) American standard:  a) Materials: ANSI / ASME A197-79  b) Dimensions: ANSI / ASME B16.3-85  c) Threads: ANSI / ASME B1.20.1

2) Din standard:  a) Materials: DIN1692  b) Dimensions: DIN2950  c) Threads: DIN2999

3) British standard: a) Materials: ISO5922 b) Dimensions: ISO49 c) Threads: ISO7/1

Features:1) Hot dipped galvanized using the first class zinc; electric galvanized, normal black or shining black

 2) Size: 1/8" to 6"

 3) Available in galvanized, black, banded, beaded and plain 

4) Excellent materials, precise angles, smooth surface, sturdiness and durableness
and good antirust property.
5) Nylon bags with pallets or cartons