Machinery's Handbook, 31st Edition
1874 Rivets In this Standard, Table 3a and Table 3b , the following definitions apply: 1) Nominal diameter: The diameter of the shank; 2) Nominal length of rivets other than countersunk or raised countersunk rivets: The length from the underside of the head to the end of the shank; 3) Nominal length of countersunk and raised countersunk rivets: The distance from the periphery of the head to the end of the rivet measured parallel to the axis of the rivet; and 4) Manufactured head: The head on the rivet as received from the manufacturer. Table 3a. Tentative Range of Lengths for Rivets Appendix to BS 4620:1970 (1998) Nom. Shank Dia. Nominal Length 3 4 5 6 8 10121416 (18) 20 (22) 25 (28) 30 (32) 35 (38) 40 45 … 1 d d d d d d d d d … d ………………………… 1.2 d d d d d d d d d … d ………………………… 1.6 ddddddddd d … d d … … … … … … … … 2 d d d d d d d d d … d d d … … … … … … … … 2.5 ddddddddd d … d d … … … … … … … … 3 … dddddddd d d d d … … … … … … … … (3.5) ……………………………………………………… 4 … … … d d d d d d d … d d … … … … … … … … 5 … … … ddddddddd d d d … d d … … … 6 … … … ddddddddd d d d … d d … d … Nom. Shank Dia. Nominal Length 10 12 14 16 (18) 20 (22) 25 (28) 30 (32) 35 (38) 40 45 50 55 60 65 70 75 (7) ……………………………………………………… 8 ddddddddd d … d d … d d … … … … … 10 … … d d d d d d d d … d d d d d … … … … … 12 … … … … … … … d … d … d … d … d d … … … d (14) ……………………………………………………… 16 ……………………… … … … … d d d d d d … d Nom. Shank Dia. Nominal Length 45 50 55 60 65 70 75 80 85 90 (95) 100 (105) 110 (115) 120 (125) 130 140 150 160 (18) ……………………………………………………… 20 d … … d … d … d ………………………………… (22) ……………………………………………………… 24 … … … … d … d … d d … d … … … … … … … … … (27) ……………………………………………………… 30 …………………… d d … d … d … d … … … … … (33) ……………………………………………………… 36 ……………………… … … d … d … d … d … … … (39) ……………………… … … … … … … d … d d d d All dimensions are in millimeters. Note: Sizes and lengths shown in parenthesis are nonpreferred and should be avoided if possible. British Standard Small Rivets for General Purposes.— Dimensions of small rivets for general purposes are given in British Standard 641:1951 and are shown in Table 4 on page 1876 . In addition, the standard lists the standard lengths of these rivets, gives the dimen sions of washers to be used with countersunk head rivets (140 ° ), indicates that the rivets may be made from mild steel, copper, brass, and a range of aluminum alloys and pure alu minum specified in BS 1473, and gives the dimensions of Coopers’ flat head rivets 1 ∕ 2 inch in diameter and below, in an appendix. In all types of rivets, except those with countersunk heads, there is a small radius or chamfer at the junction of the head and the shank. British Standard Dimensions of Rivets ( 1 ∕ 2 to 1 3 ∕ 4 inch diameter).— The dimensions of rivets covered in BS 275:1927 (obsolescent) are given on page 1877 and do not apply to boiler rivets. With regard to this standard the terms “nominal diameter” and “standard diameter” are synonymous. The term “tolerance” refers to the variation from the nominal diameter of the rivet and not to the difference between the diameter under the head and the diameter near the point.
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