ASME Y14.00 pdf download SCREW THREAD REPRESENTATION 1.4 Definitions Definitions of terms are in accordance with ASMEB1.7M and the applicablc standard. THREAD TYPES 2.1 Straight Threads Straight 60 deg screw thread designations for draw-ings are based on ASME B1.1，ASME B1.15，ASMEB1.13M，ASME B1.21M,and ASME B1.10M. Straightpipe thread standards are covered in thc documentscited in para.2.2. 2.2 Taper Threads Taper pipe thread designations...