{"id":4520,"date":"2026-03-19T14:05:57","date_gmt":"2026-03-19T06:05:57","guid":{"rendered":"https:\/\/machinedwasher.com\/?post_type=product&#038;p=4520"},"modified":"2026-03-19T14:15:51","modified_gmt":"2026-03-19T06:15:51","slug":"screw-terminal","status":"publish","type":"product","link":"https:\/\/machinedwasher.com\/hi\/products\/screw-terminal\/","title":{"rendered":"Brass Screw Terminal with Nickel-Plated Finish High Conductivity Electrical Connector Block for PCB Panel Mounting"},"content":{"rendered":"<h2>What is a Screw Terminal?<\/h2>\n<p class=\"ds-markdown-paragraph\">A screw terminal is an electrical connector where a conductor is clamped under the head of one or more screws. The clamping pressure is applied directly by the screw head or through intermediate parts like washers or clamping plates to secure the wire\u00a0. It provides a reliable, reversible, and gas-tight connection for solid or stranded wires without the need for specialized crimping tools\u00a0.<\/p>\n<hr \/>\n<h2>Material Specifications<\/h2>\n<p class=\"ds-markdown-paragraph\">The performance of a screw terminal relies heavily on the conductive and structural materials used.<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Conductor \/ Current Bar:<\/strong>\u00a0Typically made from brass or copper alloy for high conductivity\u00a0. For high-current applications (up to 300A), copper zinc alloy (like CuZn) is common\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Screw Mechanism:<\/strong>\u00a0Usually constructed from plated brass or steel alloys to provide the necessary mechanical torque strength\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Housing \/ Insulator:<\/strong>\u00a0Generally molded from thermoplastic materials. Common grades include Polyamide 6\/6 (PA66)\u00a0. High-temperature variants use materials suitable for reflow soldering (THR)\u00a0.<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h2>Surface Finishes<\/h2>\n<p class=\"ds-markdown-paragraph\">Finishes are applied to prevent corrosion and maintain conductivity. Data based on industry standard applications\u00a0.<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Tin (Matte or Bright):<\/strong>\u00a0The most common finish. Maintains good solderability and contact resistance. Often applied over a nickel base for high-corrosion resistance\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Nickel:<\/strong>\u00a0Used for higher temperature applications or where enhanced corrosion protection is needed, common in automotive battery terminals\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Silver:<\/strong>\u00a0Applied in high-current\/power applications (like converters) for superior conductivity\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Zinc Plating:<\/strong>\u00a0Common on steel screw components for the fastener itself. Offers moderate corrosion resistance (typically 72h+ salt spray)\u00a0.<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h2>Specifications &amp; Ratings<\/h2>\n<p class=\"ds-markdown-paragraph\">Critical technical data points for MRO sourcing.<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Wire Range (Cross-Section):<\/strong>\u00a0Supports solid wires and stranded wires with ferrules. Typical ranges vary from fine wire (0.08 mm\u00b2 \/ 28 AWG) up to heavy-duty (95 mm\u00b2 \/ 0000 AWG)\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Current Rating (Inom):<\/strong>\u00a0Varies by size, from 16A for standard PCB mount blocks up to 192A &#8211; 300A for high-power feed-through blocks\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Voltage Rating (Ue):<\/strong>\u00a0Standard ratings include 300V, 600V, and up to 1000V for industrial control and distribution panels\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Torque Values:<\/strong>\u00a0Specific tightening torque is critical. Example: M4 screw terminals often require 1.5 &#8211; 1.8 N\u00b7m; larger M8 terminals require 8 &#8211; 10 N\u00b7m\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Temperature Range:<\/strong>\u00a0Typically rated for industrial environments from -40\u00b0C up to +105\u00b0C or +130\u00b0C\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Flammability:<\/strong>\u00a0Housing must meet UL 94 V-0 standards\u00a0.<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h2>Primary Applications<\/h2>\n<p class=\"ds-markdown-paragraph\">Screw terminals are used across industries where reliability and serviceability are required.<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Industrial Control Panels:<\/strong>\u00a0Used in programmable logic controllers (PLC) and variable frequency drives (VFD) for secure wiring\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Power Distribution:<\/strong>\u00a0Utilized in terminal blocks, busbars, and power supplies for high-current transfer\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Renewable Energy:<\/strong>\u00a0Suitable for solar inverters and wind turbine control systems\u00a0.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Building Automation:<\/strong>\u00a0Found in HVAC controls, lighting panels, and access control systems.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Automotive &amp; Marine:<\/strong>\u00a0Used in battery management systems and marine electronics where vibration resistance is required (often with anti-spread devices)\u00a0.<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h2>Best Practice Application Example<\/h2>\n<p class=\"ds-markdown-paragraph\"><strong>Scenario:<\/strong> Replacing a failed terminal block in a main control panel (P\/N: NSYTRV62).<\/p>\n<p class=\"ds-markdown-paragraph\">An MRO technician needs to connect a 4 mm\u00b2 solid copper conductor. They strip the wire to 10 mm, loosen the M4 screw (torque target 1.5 N\u00b7m), and insert the conductor into the square washer terminal. The screw is tightened, clamping the wire securely between the current bar and the clamping plate. The polyamide 6\/6 housing provides 8.2 mm width spacing and achieves a comparative tracking index (CTI) of 500, ensuring creepage distance is maintained in the polluted industrial environment. The connection is rated for 41A at 1000V, certified by VDE and UL.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone  wp-image-4522\" src=\"https:\/\/machinedwasher.com\/wp-content\/uploads\/2026\/03\/1688_image_share_1bd004e10d238f05704738ff85d77205.jpg\" alt=\"\" width=\"278\" height=\"278\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>Brass Screw Terminal with Nickel-Plated Finish High Conductivity Electrical Connector Block for PCB Panel Mounting<\/p>","protected":false},"featured_media":4521,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[35],"product_tag":[3420,3419,3422,3411,3416,3412,3414,3410,3413,3421,3409,3408,3417,3415,3418],"class_list":{"0":"post-4520","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-machined-screws","7":"product_tag-12-volt-power-distribution-block","8":"product_tag-12v-power-distribution-block","9":"product_tag-ac-power-distribution-block","10":"product_tag-barrier-strip","11":"product_tag-battery-screw-terminal","12":"product_tag-feed-through-terminal","13":"product_tag-ground-terminal","14":"product_tag-pcb-terminal-block","15":"product_tag-power-distribution-block","16":"product_tag-power-distribution-block-4-0","17":"product_tag-screw-in-terminal-block","18":"product_tag-screw-terminal","19":"product_tag-screw-terminal-block","20":"product_tag-screw-terminal-pcb","21":"product_tag-terminal-block-wago","23":"first","24":"instock","25":"shipping-taxable","26":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/machinedwasher.com\/hi\/wp-json\/wp\/v2\/product\/4520","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/machinedwasher.com\/hi\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/machinedwasher.com\/hi\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/machinedwasher.com\/hi\/wp-json\/wp\/v2\/comments?post=4520"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/machinedwasher.com\/hi\/wp-json\/wp\/v2\/media\/4521"}],"wp:attachment":[{"href":"https:\/\/machinedwasher.com\/hi\/wp-json\/wp\/v2\/media?parent=4520"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/machinedwasher.com\/hi\/wp-json\/wp\/v2\/product_brand?post=4520"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/machinedwasher.com\/hi\/wp-json\/wp\/v2\/product_cat?post=4520"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/machinedwasher.com\/hi\/wp-json\/wp\/v2\/product_tag?post=4520"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}