<div class="pad_b15" style="position: relative;"><div style="position: absolute; top: 0px; left: 0px;">Convex Type</div><div style="position: absolute; top: 0px; left: 170px;">Standard Concave Type</div><div style="position: absolute; top: 0px; left: 342px;">Wide Concave Type</div><div style="position: absolute; top: 0px; left: 505px;">Bolt Fixing Concave Type</div><img alt="" src="//uk.misumi-ec.com/linked/item/10300355270/img/drw_01_001.gif" style="width: 742px; height: 339px;" /><br /><span class="fontNote">[!]</span> Thread depth ℓ: for M3 to 8: ℓ = M &times; 1.5; for M10 to 18: ℓ = M &times; 1.<br /><span class="fontNote">[!]</span> Unless otherwise specified, the dimension tolerance conforms to JIS B 0405 Class m. However, chamfer tolerance, tapped depth, T, T1, T2, and W dimension are excluded.</div><div class="pad_b15"><table cellspacing="0" rules="all"><tbody><tr><td align="center" class="headerCell" rowspan="2">Convex Type</td><td align="center" class="headerCell" colspan="3">Concave Type</td><td align="center" class="headerCell" rowspan="2">[M] Material</td><td align="center" class="headerCell" rowspan="2">[S] Surface Treatment</td></tr><tr><td align="center" class="headerCell">Standard Type</td><td align="center" class="headerCell">Wide Type</td><td align="center" class="headerCell">Bolt Fixing Type</td></tr><tr><td class="bodyCell"><font class="fontType">FNNB</font></td><td class="bodyCell"><font class="fontType">FNTB</font></td><td class="bodyCell"><font class="fontType">FNTWB</font></td><td align="center" class="bodyCell"><font class="fontType">FNTFB</font></td><td align="center" class="bodyCell" rowspan="2">EN 1.1191 Equiv.</td><td align="center" class="bodyCell">Black Oxide</td></tr><tr><td class="bodyCell"><font class="fontType">FNNM</font></td><td class="bodyCell"><font class="fontType">FNTM</font></td><td class="bodyCell"><font class="fontType">FNTWM</font></td><td align="center" class="bodyCell">&mdash;</td><td align="center" class="bodyCell">Electroless Nickel Plating</td></tr><tr><td class="bodyCell"><font class="fontType">FNNS</font></td><td class="bodyCell"><font class="fontType">FNTS</font></td><td class="bodyCell"><font class="fontType">FNTWS</font></td><td align="center" class="bodyCell">&mdash;</td><td align="center" class="bodyCell">EN 1.4301 Equiv.</td><td align="center" class="bodyCell">&mdash;</td></tr></tbody></table></div>