ASME B18.31.2:2014 pdf free download

ASME B18.31.2:2014 pdf free download Continuous Thread Stud, Double-End Stud, and Flange Bolting Stud (Stud Bolt) (Inch Series)
1 INTRODUCTION1.1 Scope
1.1.1 This Standard covers the complete dimen-sional and general data for the following types of studsin inch dimensions:
(a) continuous thread studs(b) double-end studs
c) flange bolting studs (stud bolts)
These studs are recognized as American NationalStandard.The following configurations are covered:continauous fhrread strd: a stud that is threaded over itscomplete length.
dorble-end (clammping fype – iderical ends) stud: a studwith screw threads of the same length and configurationon each end.This type of stud serves the function ofclamping two bodies together with a nut on each end.double-end (tap-end type) stued: a stud designed to beinstalled in a tapped hole and usually with differentthreaded lengths on each end. For the tap end of thestuds, both regular unified threads and interference-fitthreads are covered.
Double-end studs of the following body diametersare covered:
(a) reduced-diameter body (see para. 6.1 fordimensions)
(b) full body (see para.6.2 for dimensions)
flarge bolfirg sted (stud bolt): a threaded stud used pri-marily in applications with flanges covered by ASMEB16.5,and made using ASTM A01 bolting materials.
1.1.2The inclusion of dimensional data in thisStandard is not intended to imply that all productsdescribed are stock production items.Consumers shouldconsult with suppliers concerning availability ofproducts.
2 COMPARISON WITH ISO DOCUMENTSThere is no comparable ISO standard.
3REFERENCED STANDARDS
The following is a list of publications referenced inthis Standard.Unless otherwise specified, the referenceshall be to the most recent issue at the time of orderplacement.
ASME B1.1,Unified Inch Screw Threads (UN and UNRThread Form)
4 TERMINOLOGY For definitions of terms relating to fasteners or fea- tures thereof used in this Standard, refer to ASME B18.12.
5 DIMENSIONS
(a) All dimensions in this Standard are given in inches, and apply before coating, unless otherwise speci- fied. Table 1 contains the dimensions for continuous thread studs. Table 2 contains the thread length dimen- sions for double-end (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 other- wise 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 minimum body diameter is the minimum pitch diameter 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 diameter 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 minimum 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