<p class="MsoBodyText" style="margin-bottom: 12.0pt; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">This document specifies the characteristics of hexalobular socket countersunk flat head screws with reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M2 to M10, and with product grade A.</span></p>
<p class="MsoBodyText" style="margin-bottom: 12.0pt; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">If in certain cases other specifications are requested, stainless steel grades can be selected from </span><span class="stdpublisher"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">ISO</span></span></span><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';"> <span class="stddocNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">3506</span></span></span>‑<span class="stddocPartNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">1</span></span></span>, and dimensional options from <span class="stdpublisher"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">ISO</span></span></span> <span class="stddocNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">888</span></span></span> or <span class="stdpublisher"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">ISO</span></span></span> <span class="stddocNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">4753</span></span></span>.</span></p>
<p class="Note" style="tab-stops: 19.85pt 39.7pt 48.25pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">NOTE 1<span style="mso-tab-count: 1;"> </span>The reduced loadability (related to the countersunk head dimensions in combination with penetration of the hexalobular socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes; see </span><span class="citetbl"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">Table 3</span></span></span><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">.</span></p>
<p class="Note" style="tab-stops: 19.85pt 39.7pt 48.25pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">NOTE 2<span style="mso-tab-count: 1;"> </span>Hexalobular socket countersunk head screws (high head), with full loadability are specified in </span><span class="stdpublisher"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">ISO</span></span></span><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';"> <span class="stddocNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">14582</span></span></span>, but these products are not interchangeable, because of different head heights.</span></p>
<p class="Note" style="tab-stops: 19.85pt 39.7pt 48.25pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">NOTE 3<span style="mso-tab-count: 1;"> </span>Particular attention is needed to ensure alignment of the countersunk head with the bearing surface of the countersink in the assembly.</span></p>
Registration number (WIID)
78695
Scope
<p class="MsoBodyText" style="margin-bottom: 12.0pt; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">This document specifies the characteristics of hexalobular socket countersunk flat head screws with reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M2 to M10, and with product grade A.</span></p>
<p class="MsoBodyText" style="margin-bottom: 12.0pt; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">If in certain cases other specifications are requested, stainless steel grades can be selected from </span><span class="stdpublisher"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">ISO</span></span></span><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';"> <span class="stddocNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">3506</span></span></span>‑<span class="stddocPartNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">1</span></span></span>, and dimensional options from <span class="stdpublisher"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">ISO</span></span></span> <span class="stddocNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">888</span></span></span> or <span class="stdpublisher"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">ISO</span></span></span> <span class="stddocNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">4753</span></span></span>.</span></p>
<p class="Note" style="tab-stops: 19.85pt 39.7pt 48.25pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">NOTE 1<span style="mso-tab-count: 1;"> </span>The reduced loadability (related to the countersunk head dimensions in combination with penetration of the hexalobular socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes; see </span><span class="citetbl"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">Table 3</span></span></span><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">.</span></p>
<p class="Note" style="tab-stops: 19.85pt 39.7pt 48.25pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">NOTE 2<span style="mso-tab-count: 1;"> </span>Hexalobular socket countersunk head screws (high head), with full loadability are specified in </span><span class="stdpublisher"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">ISO</span></span></span><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';"> <span class="stddocNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">14582</span></span></span>, but these products are not interchangeable, because of different head heights.</span></p>
<p class="Note" style="tab-stops: 19.85pt 39.7pt 48.25pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">NOTE 3<span style="mso-tab-count: 1;"> </span>Particular attention is needed to ensure alignment of the countersunk head with the bearing surface of the countersink in the assembly.</span></p>
