Technical Description of productsInformation 15. Bored hole size before tapping ( for thread cutting ) ■ for Whitworth Threads ■ for Sewing Machine Threads Unit : mm Unit : mm Size Minor diamめeteねr じof 内int径e(rnaDl 1t)hreads (D1)Max.Min. Boねreじd( rh下eof穴l.e) 径size Size Minor diameter of internal threads (D1) Bored hole sizeMax.Min.( ref.) ※※ 1/16 W 60 1.230 1.107 21.5.230 1/16 SM 80 1.281 1.211 1.26 ※※ 3/32 W 48※1/8W40 1.914 1.785 31.6.8682.5912.4562.56 5/64 SM 64 1.593 1.513 1.57 ※ 5/32 W 32 3.214 3.071 53.1.138 3/32 SM 56 1.936 1.841 1.91 ※ 3/16 W 24 3.745 3.563 63.5.790 3/32 SM 100 2.156 2.081 2.14 ※ 7/32 W 24 4.540 4.358 84.0.429 1/8 SM 40 2.551 2.421 2.52 1/4 W 20 5.204 4.914 95.4.135/16W183/8W166.6708.1136.3407.7331068.7..50921/8SM 442.605 2.485 2.589/64SM 402.9482.8182.92 7/16 W 14 9.508 9.048 129.3.4 11/64 SM 32 3.584 3.424 3.54 1/2 W 12 10.830 10.310 1130.7.7 11/64 SM 40 3.742 3.612 3.71 9/16 W 125/8W113/4W107/8W912.418 11.89813.81713.25716.77816.17819.69119.031 1162.6.31193.5.7211269.U3..65nit : mm3/16SM 24 3.658 3.498■3/1f6orSSMe2w8 ing Machin3e.8T44hreads3.6843/16SM 323.9803.8203.623.803.9U4nit : mm ••• ※DW111hM: /iM1t8awrinkWWoeordrthds87iiTzahemsreeaatredersinohfaaJvcIeScoCbrledaeasnsn222c25eel..iin52mwt12めeiin49trhnねataBeじlSdtWh内fr.reo径a(mdD.J22I1S)14. ..841649 22.3ねじ2下5.穴0 径※11 1/4 3/8WW7628.40427.64430.92330.12323280.5..2733/16SM 407/32SM 3215/64SM 284.1384.0084.114.7744.6144.735.0554.8755.01 ※1 1/2 W 6 34.098 33.298 333.6.96 1/4 SM 24 5.266 5.086 5.22 1 5/8 W 5 36.409 35.529 356.1.231 3/4W539.58438.704369.5.491 7/8W4 1/22W4 1/242.22741.23745.40244.41244825.0..0221/4SM 285.4525.2725.411/4SM 405.7265.5965.699/32SM 286.2566.0666.21 2 1/4 W 4 51.068 49.958 590.4.8 5/16 SM 24 6.864 6.674 6.82 2 1/2 W 4 57.418 56.308 1507.7.12 3/4W3 1/262.81661.6361622.3.511/32SM 28 7.843 7.653 7.80 3 W 3 1/2 69.166 67.986 1638.7.9 3 1/4 W 3 1/43 1/2W3 1/474.902 73.70281.25280.052 178641.6..60 3 3/4 W 3 86.908 85.668 1896.5.6 4 W 3 93.258 92.018 2922.3.9 • D1: Minor diameter of JIS Class 2 internal thread. • Whitworth Threads have been eliminated from JIS. • ※Marked sizes are in accordance with BSW. ■ for Pipe Threads Unit : mm p Unit : mm Size Minor Diameter of JIS internal thread (D1) Bored hole size( ref.) Size Minor diametめerねoじf i内nt径e(rnDa1l)threads (D1)Max.Min.BBoねreじd( 下rheo穴f.l.)e)径ssiizzee PS 1/16 - 28 6.632 6.490 66.5.500 Rp 1/8 - 28 8.637 8.495 68.75.5700 PS 1/8 - 28 8.637 8.495 8.50 Rp 1/4 - 19 11.549 11.341 11.40 PS 1/4 - 19 11.549 11.341 181.5.300 Rp 3/8 - 19 15.054 14.846 184.75.9800 PS 3/8 - 19 15.054 14.846 1114.3.800 Rp 1/2 - 14 18.773 18.489 1118.73.580 PS 1/2 - 14 18.773 18.489 1148.9.50 Rp 3/4 - 14 24.259 23.975 12544.29.080 PS 5/8 - 14 20.729 20.445 20.4 Rp 1 - 11 30.472 30.110 30.2 PS 3/4 - 14 24.259 23.975 1284.5.0 · For the product symbol of“AUSP Rp”, see the list above. 198.05 PS 7/8 - 14 28.019 27.735 2247.0.7 214.0 PS 1- 11 30.472 30.110 3300.2.1PS11/8 -1135.12034.75834.7 2340.52 PS 1 1/4 - 11 39.133 38.771 3388.8.8 238.38 PS 1 1/2 - 11 45.026 44.664 4444.7.7 3404.87 PS 1 3/4 - 11 50.969 50.607 50.6 PS 2- 11 56.837 56.475 5566.5.5 3556.45 PS 2 1/4 - 11 62.933 62.571 62.5 39.4 PS 2 1/2 - 11 72.442 72.010 72.0 45.3 PS 3- 11 85.142 84.710 84.7 PS 3 1/2 - 11 97.588 97.156 97.2 51.3 PS 4- 11 110.288 109.856 109.9 57.1 · For taps with the product symbol of“PS”or“Rp”, see the list above. Technical-41