ASME B18.31.2 pdf download.Continuous Thread Stud, Double-End Stud, and Flange Bolting Stud (Stud Bolt) (inch Series).
1.1.1 ASME B18.31.2 covers the complete dimensional and general data for the following types of studs in inch dimensions:
a) continuous thread studs
b) flange bolting studs (stud bolts)
These studs are recogrnzed as American National Standard. The following configurations are covered:
thread stud: a stud that is threaded over its complete length.
a stud with screw threads of the same length and configuration on each end. This tYpe of stud serves the function of clamping two bodies together with a nut on each end. double-end (lap-end type) stud: a stud designed to be installed in a tapped hole and usually with different threaded lengths on each end. For the tap end of the studs, both regular unified threads and interference-fit threads are covered.
Double-end studs of the following body diameters are covered:
(a) reduced-diameter hod (see para. 6.1 for dimensions)
(b) full body (see pard. 6.2 for dimensions) flange bolting stud (stud bolt): a threaded stud used primarily in applications with flanges covered I ASME 1316.5, and made using ASTM AOl bolting materials.
1.1.2 The inclusion of dimensional data in this Standard is not intended to imply that all products described are stock production items. Consumers should consult with suppliers concerning availability of products.
2 COMPARISON WITH ISO DOCUMENTS
llwre is no comparable ISO standard.
3 REFERENCED STANDARDS
The following is a List of publications referenced in this Standard. Unless otherwise specified, the reference shall 1w to the most recent issue at the time of order plae ement.
ASME Bl.1, Unified inch Screw Threads (UN and UNR Thread Form)
(b) For double-end studs, full threads are required for the lengths B and Bi, extept for the ends, as denoted by dimerion, U, in Tables 2 and 3.
(c) The transition from full thread to incomplete thread shall be smooth and uniform. The major diameter for incomplete threads shall not exceed the at tual diameter of the complete (full form) threads.
(d) For the nut ends of studs, the transition from full thread to no thread shall be within five thread pitches from the minimum full thread length. B.
10 SCREW THREADS
10.1 UNC, UNF, and 8UN Thread Series and Tolerance Class
Threads shall be unified inch oarse, fine, or 8-thread senes Class 2A m accordance with ASME Bl.1. Unless otherwise specified by the purchaser, coated and plated threads shall conform to the maximum limit of Class 3A (GO) and the minimum limit of Class 2A (NOT GO).
10.2 Class 5 Interference-Fit Threads (for Tap-End Studs)
In addition to the threads identified in para. 10.1. interference-fit threads ma’ be ordered for the tap end of tap-end type studs. These threads shall be interference fit (Class 5) of the modified National thread form in the coarse thread series (NC) in sizes 0.250 in. through 1.500 in. in accordance with ASMF B1.12.
NOTE: To dLhieve the dvslred perlorm.rnue from an NC-5 thread. the indwation of the proper sufln ind.tatrng the site of the m.lJor diameter is cri&al. The designation of .in NC-5 thread is not complete without the irciusion of the suffix. To sckst the appropriate suffis for a spc.itflc pplit lion, the user should tonsult Appemhws H and C in ASME H1.12. Additionil mIorm.ition on NC-S thread appliations is available in SAE J2271,
10.3 Thread Gaging
Unless othersvise specified. dtmensional dci. eptabthty of screw threads shall be determined based on System 21 of ASME B1.3.
11 MATERIALS AND MECHANICAL PROPERTIES
11.1 Materials for Continuous Thread Studs, Double-End Studs, and Clamping Studs
Unless otherwise specified, steel studs shall conform to the requirements of ASTM A354, SAE J429, or ASTM A449, as identified by the purchaser.
Unless otherwise specified, studs of corrosion resistant stainless steels shall conform to the requirements of a specified group and condition designated in ASTM F593.
ASME B18.31.2 pdf download
