{"product_id":"malco-6x3-8-zip-in-self-piercing-screws-1-4-slotted-hex-washer-head-sheet-metal-screws-fast-easy-piercing-zinc-plated-18000-count","title":"Malco 6X3\/8 Zip-In Self-Piercing Screws | 1\/4\" Slotted Hex Washer Head Sheet Metal Screws  | Fast \u0026 Easy Piercing | Zinc Plated (18000 Count)","description":"\u003cdiv\u003e\n\u003cp\u003eMeet Malco Zip-In HW6X3\/8Z Self-Piercing Screws—the fast, dependable solution for joining thin sheet metal with precision. This 6x3\/8\" self-piercing screw features a zinc-plated finish and a 1\/4\" slotted hex washer head, designed for quick, secure fastening in metal enclosures, HVAC ductwork, automotive panels, and more.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eUnique thread design for instant bite:\u003c\/strong\u003e A single starting thread is formed down to the very tip of the point, the source of Zip-In's penetrating power from the first contact.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDouble-thread engagement for rapid penetration:\u003c\/strong\u003e A second thread above the point engages after initial penetration, drilling in double fast for efficient installation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeat-treated for sharp, durable points:\u003c\/strong\u003e A sophisticated heat-treat process tapers to a fine, sharp point without sacrificing critical point strength.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFaster driving and heavier-gauge capability:\u003c\/strong\u003e The Zip-In design delivers quicker fastening and greater capacity for heavier gauges of sheet metal than any other self-piercing type.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCorrosion-resistant finish:\u003c\/strong\u003e Zinc plating protects against rust in exposed or humid environments, helping maintain long-term performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBulk quantity for large projects:\u003c\/strong\u003e Packaged in a generous 18,000-count bundle, ideal for continuous work on multiple panels or installations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eHVAC ductwork and metal housings where fast, reliable piercing is essential.\u003c\/li\u003e \u003cli\u003eAutomotive body panels, instrument enclosures, and electrical cabinets requiring consistent bite and strong pull-out resistance.\u003c\/li\u003e \u003cli\u003eMetal roofing, siding, and panel assemblies that demand a robust self-piercing fastener with rapid installation.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy choose Zip-In over traditional self-piercing screws?\u003c\/strong\u003e The combination of the tip-first thread, second-thread engagement, and optimized heat treatment translates to faster, cleaner assemblies with fewer misdrives and reduced stripping risk. It’s a practical, high-performance choice for professional installers and serious DIYers tackling metal projects.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003ePro tips for best results\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eUse a compatible driver with a 1\/4\" hex washer head to maximize contact and drive efficiency.\u003c\/li\u003e \u003cli\u003eKeep the mating metal surfaces clean and aligned to ensure the threads engage smoothly from the first bite.\u003c\/li\u003e \u003cli\u003eAvoid over-tightening to protect the fastener’s clamping power and prevent panel distortion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Malco","offers":[{"title":"Bulk \/ 3\/8 In. \/ #6","offer_id":42658647408688,"sku":"574-HW6X3\/8Z","price":429.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/3883\/0640\/files\/71db4eb7-1ec3-40be-9cf4-ea6f2305608e.png?v=1766159483","url":"https:\/\/usatooldepot.com\/products\/malco-6x3-8-zip-in-self-piercing-screws-1-4-slotted-hex-washer-head-sheet-metal-screws-fast-easy-piercing-zinc-plated-18000-count","provider":"USA Tool Depot","version":"1.0","type":"link"}