ASME B18.31.2 pdf 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 studsb) double-end studs
(cflange bolting studs (stud bolts)
These studs are recognized as American NationalStandard.The following configurations are covered:
cortineuous tread stud: a stud that is threaded over itscomplete length.
double-end (clamping type – identical ends) stud: a studwith screw threads of the same length and configuration
on each end. This type of stud servea itconngurationclamping two bodies together with a nut on each end.
double-end (tap-end type) stud: a stud designed to be
installed in a tapped hole and usually with differentthreaded lengths on each end. For the tap end of the
studs, 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 bolting stud (stud bolt): a threaded stud used pri-marily in applications with flanges covered by ASMEB16.5,and made using ASTM A01 bolting materials.
1.1.2 The inclusion of dimensional data in thisStandard is not intended to imply that all productsdescribed are stock productionitems.Consumers shouldconsult with suppliers concerning availability ofproducts.
2COMPARISON 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)
ASME B1.3，Screw Thread Gaging Systems forAcceptability – Inch and Metric Screw Threads (UN,UNR,UNJ,M, and MJ)
ASME B1.12,Class 5 Interference-Fit ThreadASME B16.5,Pipe and Flange Fittings
ASME B18.2.8,Clearance Holes for Bolts,Screws,andStuds
ASME B18.2.9,Straightness Gage and Gaging for Boltsand Screws
ASME B18.12，Glossary of Terms for MechanicalFasteners
ASME B18.18,Quality Assurance for FastenersASME Y14.5,Dimensioning and Tolerancing
Publisher: The American Society of MechanicalEngineers (ASME),Two Park Avenue, New York, NY10016-5990; Order Department: 22 Law Drive,P.O. Box 2900, Fairfield, NJ07007-2900(www.asme.org)
ASTM A193/A193M，Alloy-Steel and Stainless SteelBolting Materials for High-Temperature ServiceASTM A320/A320M,Alloy Steel Bolting Materials forLow-Temperature Service
ASTM A354,Quenched and Tempered Alloy Steel Bolts,Studs, and Other Externally Threaded FastenersASTM A380,Standard Practice for Cleaning,Descaling,and Passivation of Stainless Steel Parts,Equipment,and Systems
ASTM A437 / A437M,Alloy-Steel Turbine-Type BoltingMaterial Specially Heat Treated for High-TemperatureService
ASTM A449,Quenched and Tempered Steel Bolts andStuds
ASTM A453/A453M,High-Temperature BoltingMaterials With Expansion Coefficients Comparable toAustenitic Stainless Steels
ASTM A540/A540M，Alloy-Steel Bolting Materials forSpecial Applications
ASTM A10i4/A1014M，Precipitation-HardeningBolting Material (UNS N07718) for High TemperatureService
ASTM F468，Nonferrous Bolts，Hex Cap Screws，andStuds for General Use
ASTM F593,Stainless Steel Bolts,Hex Cap Screws,and Studs
ASTM F788/F788M,Surface Discontinuities of Bolts,Screws, and Studs,Inch and Metric Series
4 TERMINOLOGY For definitions of terms relating to fasteners or fea- tures thereof used in this Standard, refer to ASME B18.12.
(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 con- tains 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.