Abstract： ASME B18.5:2008 pdf download.Round Head Bolts(Inch Series). 2.1.3 Underhead Fillets. All bolts having flat bearing surface type heads shall have a definite fillet at the junction of head and shank. The minimum radius of fillet shall be equa...

ASME B18.5:2008 pdf download.Round Head Bolts(Inch Series).

2.1.3 Underhead Fillets. All bolts having flat bearing surface type heads shall have a definite fillet at the junction of head and shank. The minimum radius of fillet shall be equal to one-hall of the maximum values specified in the respective dimensional tables. The radius of fillet shall not exceed the values specified in the respective dimensional tables except for bolts produced from

nonferrous and corrosion-resistant materials, on which maximum fillets shall be subject to agreement between manufacturer and

purchaser.

2.2 Square Neck

2.2.1 Depth of 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 bearing surface for bolts having countersunk heads.

2.2.2 Corners of Square. The corners of square neck may he rounded to the extent specified in the respective dimensional tables and need not be filled out for the total depth of square.

2.3 Body Diameter

2.3.1 Full Diameter Body. Unless othens’ise specified, all bolts covered by this Standard, except round head square neck bolts and round head short square neck bolts, will 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.

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