ASME B18.5-2008 pdf free download.Round Head Bolts (Inch Series).
ASME B18.5 covers the complete general and dimensional data for the various types of inch series bolts generally classified as round head bolts and n-cognized as American National Standard
1.1.2 The inclusion of dimensional data in this Standard is not intended to imply that all of the products described are steck production sizes. Consumers should consult with manufacturers concerning availability of products.
1.2 Bolt Types
The bolt types covered by this Standard are enumerated and described in paras. Ill through 1.2A0.
1.2.1 Round Head Bolt (Formerly Designated Button Head Bolt). The round head bolt shall have a clrcubr head with a low rounded top surface and a flat bearing surface. l)imensions are given in Table I.
1.2.2 Round Head Square Neck Bolt (Formerly Desig. nated Round Head Carriage Bolt). The round head square neck bolt shall have a circular head with a low rounded top surface and a flat bearing surface, and an integrally formed scuare neck under the head. Dimensions are given in Table 2
1.2.3 Round Head Short Square Neck Bolt. The round head short no.k bolt shall have d circular head with a low rounded top surface and a flat bearing surface, and an integrally formed short length square neck under th head. Dimensions are given in Table 3.
1.2.4 Round Head Ribbed Neck Bolt (Formerly Designated Ribbed Neck Carriage Bolt). The round head ribbed neck bolt shall have a circular head with a low rounded top surface and a flat hearing surface, and a ribbed or splined neck formed on the shank below the head. Dimensions are given in Table 4.
1.2.5 Round Head Fin Neck Bolt (Formerly Designated Fin Neck Carriage Bolt). The round head fin neck bolt shall have a circular head with a low rounded top surface and a flat bearing surface, and two diametrically opposite integrally formed fins at th junction of head with shank. Dimensions are given in Table 5.
1.2.6 Step Bolt. The step bolt shall have a large circular head with a low rounded top surface and a flat bearing surface, and an integrally formed square neck under the head )inwnsions are given in Table 6.
1.2.7 Countersunk Boll The countersunk bolt shall have a circular head with a flat top surface and a conical bearing surface having a head angle of approximately 81) deg. Countersunk bolts are available with and without a slot in the head, as specified by the purchaser. Dimensions are given in Table 7.
1.2.8 114.deg Countersunk Square Neck Bolt (ForInerly Designated Countersunk Carriage Bolt). The I l4dvg countersunk square neck bolt shall have a circular head with a flat top surface and a conical bearing surface having a head angle of approximately 14 deg, and an integrally formed square neck under the bead. Dimensions are given in Table 8.
1.2.9 Flat Countersunk Head Elevator Bolt. The flat countersunk head elevator bolt shall have a large circubr head with a Flat top surface and a shallow conical bearing surface, and an integrally formed square neck under the head. Dimensions are given in Table 9.
1.2.10 T-Head Bolt. The T-head bolt shall have a rectangular head with a rounded top surface and a flat bearing surface, Dimensions are given in Table 10.
1.3 Terminology
For detinitionsol terms relating to fasteners or component features thereof used in this Standard, refer to ASME 1118.12.
1.4 Dimensions
All dinwnsioris in this Standard are given in inches, unless otherwise stated.
1.5 Designation
Round head bolts are designated by the following data, preferably in the sequence shown:
(a) product name and designation of the standard
(b) nominal diameter, threads per inch, and nominal length
(c) material grade or identification, and protective coating, if required
EXAMPLES:
(1) Round head iihcwt square neck bolt ASME HiltS, i.L6 * 1. steel ASTM A 107. Grade A. ,inc plated AS]M E 1941. Fe/1,n 3A.