PRESS2010_EN

1134/1208

.ad）4s（dsdadkd°021iesXrktwrrdL2ivrvswd°021 .nmLfLsLgnmーExcerpt from JIS B 1176（2000）ーP（7）b（8）　（Reference）18tvdww（1）Interior of hexagonal hole may be chamfered.When chamfering the drill bottom, the maximum value of the drill bottom depth must be more than 20% the value of hexagonal hole depth（min. t）. （1）The head may be chamfered or rounded.　（2）It should be chamfered in advance, but when it is M4 or less, to be chamfered afterwards is also available.　（3）Incomplete threaded portion u≦2P　（4）ds is available for the screw with minimum Ls designated.　（5）Whether to chamfer or round head depends on the manufactures.　（6）Chamfered or rounded head should not have burr.tw（2）u（3）（b）（6）（5）max. 45°Enlarged drawing of part XMax. rounding beneath neckLf max.＝1.7× r max. r max.＝da max.−ds max. Radius of head and radius under head （ 7）P is for the pitch.　（ 8）It is available for incomplete threaded screws.　（ 9）It is available for cap screws without knurl.　（10）It is available for cap screws with knurl.　（11）e（min.）＝1.14×s min.　（12）It is available for strength grade 12.9.　（13）It is available for other strength grades.1132Max.（ 9） 5.50Max.（10） 5.68 5.32Min. 3.6Max. 3.00Max. 2.86Min. 2.87Min.（11） 0.51Max. 3.00Max. 2.86Min. 0.1Min. 2.5呼びMax.（12） 2.560Max.（13） 2.580 2.520Min. 1.3Min. 0.3Max. 5.07Min. 1.15Min.dkdadseLfkrM4 0.720 7.00 7.22 6.78 4.7 4.00 3.82 3.44 0.60 4.00 3.82 0.2 3 3.071 3.080 3.020 2 0.4 6.53 1.4M5 0.822 8.50 8.72 8.28 5.7 5.00 4.82 4.58 0.60 5.00 4.82 0.2 4 4.084 4.095 4.020 2.5 0.5 8.03 1.9M6 12410.0010.22 9.78 6.8 6.00 5.82 5.72 0.68 6.00 5.70 0.25 5 5.084 5.140 5.020 3 0.6 9.38 2.3M8 1.252813.0013.2712.73 9.2 8.00 7.78 6.86 1.02 8.00 7.64 0.4 6 6.095 6.140 6.020 4 0.812.33 3.3M10 1.53216.0016.2715.7311.210.00 9.78 9.15 1.0210.00 9.64 0.4 8 8.115 8.175 8.025 5 115.33 4M12（M14）M16 1.753618.0018.2717.7313.712.0011.7311.43 1.4512.0011.57 0.61010.11510.17510.025 6 1.217.23 4.8 24021.0021.3320.6715.714.0013.7313.72 1.4514.0013.57 0.61212.14212.21212.032 7 1.420.17 5.8 24424.0024.3323.6717.716.0015.7316.00 1.4516.0015.57 0.61414.14214.21214.032 8 1.623.17 6.8M20 2.55230.0030.3329.6722.420.0019.6719.44 2.0420.0019.48 0.81717.23017.05010 228.87 8.6Unit：mmM24 36036.0036.3935.6126.424.0023.6721.73 2.0424.0023.48 0.81919.27519.06512 2.434.8110.4Nominal diameter（d）M3 0.5Socket Head Cap Screws