ASME B18.5:2012 pdf free download

ASME B18.5:2012 pdf free download.Round Head Bolts (Inch Series).
1.2.7 Countersunk and Slotted Countersunk Bolts.
The countersunk bolt shall have a circular head with a flat top surface and a conical bearing surface having a head angle of approximately 80 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 (Formerly Designated Countersunk Carriage Bolt). The I 14-deg 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 114 deg, and an integrally formed square neck under the head. Dimensions are given in Table 8.
1.2.9 Flat Countersunk Head Elevator Bolt. The flat countersunk head elevator bolt shall have a large circular 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 THead 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 definitions of terms relating to fasteners or component features thereof used in this Standard, refer to
ASME [118.12.
1.4 DimensIons
All dimensions 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:
(I) Round head shod square neck boll ASME 1118.5, 4-16 X 3,steel ASTM A307, Grade A, zinc plated ASTM F1941, Fe/Zn 3A.
2.2 Square Neck
2.2.1 Depth ol Square. The depth of square shall be measured, parallel to the axis of bolt at the midpoint of the flats of square, from the bottom of square to the bearing surface for bolts having flat bearing surface type heads, and to the intersection of flats of square with the conical hearing surface for bolts having countersunk heads.
2.2.2 Corners of Square. The corners of square neck may be rounded to the extent specified in the respective dimensional tables and need not be filled out for the total depth of s1uan’.
2.2.3 Corner Height. The corner height of the square shall be measured, parallel to the axis of bolt from the point where the across corners is at its minimum size to the bearing surface of bolts having flat bearing surface type heads, and to the top of the heads of bolts having countersunk heads. The gage and gaging practice for this measurement is in Mandatory Appendix I.
2.3 Body Diameter
2.3.1 FuU Diameter Body. Unless otherwise sped- fled, all bolts covered by this Standard, except round head square neck bolts and round head short square neck bolts, shall be furnished with full diameter body of limits given in the dimensional tables.
2.3.2 Round Head Square Neck and Round Head Short Square Neck Bolt Diameter Body. Unless otherwise specified, round head square neck bolts and round head short square neck bolts shall be furnished with a body diameter having a maximum limit equal to that of the full diameter body and a minimum limit equal to the minimum pitch diameter of the thread as given in the dimensional tables.