ASME B18.31.2-2014 pdf free download.Continuous Thread Stud, Double-End Stud, and Flange Bolting Stud (Stud Bolt) (Inch Series)
4 TERMINOLOGY For definitions of terms relating to fasteners or fea- tures thereofusedinthis Standard,refertoASME B18.12.
5 DIMENSIONS (a) All dimensions in this Standard are given in inches, and apply before coating, unless otherwise specified.
Table 1 contains the dimensions for continuous thread studs.
Table 2 contains the thread length dimensions for doubleend (clamping type) studs. Table 3 contains the thread length requirements for tap end studs. Table
4 contains the body diameters for double-end (clamping type) studs and tap-end studs. (b) Symbols specifying geometric characteristics are in accordance with ASME Y14.5.
6 BODY DIAMETER The diameter of the body on studs that are not threaded the full length shall be within the limits for D S specified for the applicable configuration. Unless otherwise specified by the purchaser, the reduced-diameter body or full body may be supplied at the option of the supplier.
6.1 Reduced Diameter Body The maximum body diameter is the minimum major diameter of the thread as defined in ASME B1.1. The minimumbodydiameteris the minimumpitchdiameter of the thread as defined in ASME B1.1. Dimensions are provided in Table 4.
6.2 Full Body The maximum body diameter is the same as the nomi- nal diameter of the fastener. The minimum body diame- ter is the minimum major diameter for the applicable threads as shown in ASME B1.1, Table 3A. These dimen- sions are provided in Table 4. NOTE: If the two ends of a stud have different threads, the mini- mum body diameter will be based on the thread with smaller minimum major diameter.
7 STUD LENGTH The difference between “continuous thread stud” and “flange bolting stud (stud bolt)” is that the length of continuous thread stud is defined by the overall length from end to end while the flange bolting stud length is defined from the first full thread on one end to the first full thread on the other end.
7.1 Overall Length of Continuous and Double-End Studs The overall length, L T , of the continuous and double- end type studs is the distance, parallel to the axis of the stud from one end to the other end, measured to the extreme condition on each end. The length tolerances in Table 5 are applied to this dimension.
7.2 Nominal Length for Flange Bolting Studs (Stud Bolts) The nominal length, L , on flange bolting studs (see Fig. 1) is the distance parallel to the axis of the stud from the first full thread on one end to the first full hread on the other end. Dimensions for U are the same as those in Table 1. The length tolerances in Table 6 are applied to the L dimension. Flange bolting studs (stud bolts) can be made as continuous thread (Table 1) or doubleend (Table 2) with the only difference being that nominal length, L , applies to flange bolting studs and overall length, L T , applies to all other stud types.
7.3 Length Increments The overall length of continuous thread and double- end studs and the nominal length offlange bolting studs shall be in one-quarter inch increments for lengths through 10 in. For stud lengths greater than 10 in., lengths shall be in whole inches and one-half inch increments.
8 STUD ENDS Stud ends shall be chamfered from the major diameter to a diameter equal to or less than the thread root diameter. The length of the chamfered end to the first full formed thread at major diameter, as determined by the distancethechamfered end entersinto a cylindricalNOT GO major diameter ring gage, shall be one to two thread pitches oneachend. The ends ofthe stud shall be reasonably square with the axis ofthe stud, but the slight rim or cup resulting from manufacturing shall be permissible. The ends shall be suitable for marking.ASME B18.31.2 pdf download.ASME B18.31.2-2014 pdf free download
