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STANDARD DECIMAL MEASURES.
STANDARDS OF SIZE. | WIRE-GAUGE. | ||||||||||
Proposed Standards of Size for Taps and Dies. | Standard Wire-Gauge. | Old Birmingham Wire-Gauge. | Old Lancashire Wire-Gauge. | Old Metal of Plate-Gauge. | Old Needle Wire-Gauge. | Old Music Wire-Gauge. | |||||
No. of Screw Threads per Inch. | Old Sizes. | New Standard of Size. Decimals of an Inch. | Value of each No. in Decimals of and Inch. | New Nos. of Gauge. Thousandths of and Inch. | Old Nos. of Gauge corresponding to New Nos. | Old Nos. of Gauge corresponding to New Nos. | Old Nos. of Gauge corresponding to New Nos. | Old Nos. of Gauge corresponding to New Nos. | Old Nos. of Gauge corresponding to New Nos. | ||
48 | ·100 | ·001 | 1 | ||||||||
40 | ⅛ | ·125 | ·002 | 2 | |||||||
32 | ·150 | ·003 | 3 | ||||||||
24 | ·175 | ·004 | 4 | 36 | 1 | 19 | |||||
24 | ·200 | ·005 | 5 | 35 | 2 | 18 | |||||
24 | ·225 | ·006 | 6 | .. | .. | .. | |||||
20 | ¼ | ·250 | ·007 | 7 | 34 | .. | 17 | ||||
20 | ·275 | ·008 | 8 | 33 | 3 | 16 | |||||
18 | ·300 | ·009 | 9 | 32 | .. | 15 | |||||
18 | ·325 | ·010 | 10 | 31 | 4 | 14 | |||||
18 | ·350 | ·011 | 11 | .. | .. | .. | .. | ||||
16 | ⅜ | ·375 | ·012 | 12 | 30 | .. | 5 | 13 | |||
16 | ·400 | ·013 | 13 | 29 | 80 | 6 | 12 | ||||
14 | ·425 | ·014 | 14 | 28 | 79 | .. | 11 | ||||
14 | ·450 | ·015 | 15 | .. | 78 | 7 | .. | ||||
14 | ·475 | ·016 | 16 | 27 | 77 | 8 | 10 | ||||
12 | ½ | ·500 | ·017 | 17 | .. | .. | .. | .. | |||
12 | ·525 | ·018 | 18 | 26 | 76 | .. | 9 | 6 | |||
12 | ·550 | ·019 | 19 | .. | 75 | 9 | .. | 7 | |||
12 | ·575 | ·020 | 20 | 25 | .. | .. | 8 | 8 | |||
12 | ·600 | ·022 | 22 | 24 | 74 | .. | 7 | 10 | |||
11 | ⅝ | ·625 | ·024 | 24 | 23 | 72 | 10 | 6 | 12 | ||
11 | ·650 | ·026 | 26 | .. | 71 | .. | .. | 13 | |||
11 | ·675 | ·028 | 28 | 22 | 70 | 11 | 5 | 14 | |||
11 | ·700 | ·030 | 30 | .. | 68 | .. | .. | 15{[nopt}} |