1.0Xometry Prohttps://xometry.pro/en-tr/rich600338<blockquote class="wp-embedded-content" data-secret="8hjyRJhwVM"><a href="https://xometry.pro/en-tr/articles/parallelism-gd-t-tolerance/">Parallelism GD&T: Definition, Tolerance & Measurement</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://xometry.pro/en-tr/articles/parallelism-gd-t-tolerance/embed/#?secret=8hjyRJhwVM" width="600" height="338" title="“Parallelism GD&T: Definition, Tolerance & Measurement” — Xometry Pro" data-secret="8hjyRJhwVM" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://xometry.pro/wp-includes/js/wp-embed.min.js /* ]]> */ </script> https://xometry.pro/wp-content/uploads/2026/04/basic-gdt-parallelism-callout-1-scaled.png25601463ASME Y14.5 defines five categories of GD&T tolerances based on the feature aspects they control – form, orientation, location, profile and runout. Within each category are several different tolerances. Parallelism, alongside angularity and perpendicularity, belongs to the orientation category, where all tolerances control the angular relationships between features. What is Parallelism (GD&T)? Parallelism is an […]