{"product_id":"din934-hss-4-ko-pin-cold-forming-rear-back-punch-pin","title":"DIN934 HSS #4 K.O Pin Cold Forming Rear Back Punch Pin","description":"\u003ch2\u003eDIN934 HSS #4 K.O. Pin – Cold Forming Rear Back Punch Pin\u003c\/h2\u003e\n\u003cp\u003eHengfaMold's DIN934 #4 Knockout (K.O.) rear back punch pins are precision-engineered for multi-station nut formers and cold heading machines. Fabricated from premium High-Speed Steel (HSS) with a wear-resistant Titanium Nitride (TiN) gold coating, these knockout pins ensure smooth part ejection, high dimensional stability, and prolonged service life during high-speed continuous fastener production.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium High-Speed Steel (HSS)\u003c\/strong\u003e – Exceptional core toughness, high impact resistance, and fatigue strength to prevent bending or premature breakage under heavy heading loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWear-Resistant TiN Gold Coating\u003c\/strong\u003e – PVD Titanium Nitride coating reduces surface friction, minimizes heat buildup, and prevents galling and seizure in rapid cycling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Precision Dimensional Accuracy\u003c\/strong\u003e – Ground to tight tolerances with mirror-polished surfaces, ensuring seamless fit and flawless alignment inside punch sleeves and die cases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard DIN934 Nut Forming Fit\u003c\/strong\u003e – Specifically optimized for station #4 nut forming operations and standard multi-station cold heading sequences.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Tooling Life\u003c\/strong\u003e – Substantially lowers downtime and tooling replacement frequency, driving higher production efficiency and cost savings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Knockout Pin \/ Rear Back Punch Pin (后冲棒 \/ K.O. Pin)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard \/ Station:\u003c\/strong\u003e DIN934 #4 Station Form Sequence\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Material:\u003c\/strong\u003e Premium HSS (M2 \/ H55 \/ M42 available)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface Treatment:\u003c\/strong\u003e TiN (Titanium Nitride) Gold TIN Coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e HRC 56–68 (customizable by application)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachine Compatibility:\u003c\/strong\u003e Multi-station cold heading formers (Sijin, Boyu, Lian Shyang, Jiaxin, Jinggu, youxin, and many other brands)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomization:\u003c\/strong\u003e Custom diameters, overall lengths, and head geometries manufactured to customer technical drawings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eWidely utilized as ejector and rear back punch tooling in multi-station cold headers and nut forming machines producing standard hex nuts (DIN934, ISO 4032), flange nuts, and specialized automotive fasteners.\u003c\/p\u003e\n\u003ch3\u003eCustom Tooling \u0026amp; OEM Orders\u003c\/h3\u003e\n\u003cp\u003eHengfaMold provides complete custom tooling solutions tailored to your production requirements. Send us your technical drawings or part specifications for fast quotes, tooling design assistance, and volume manufacturing support.\u003c\/p\u003e","brand":"HengfaMold","offers":[{"title":"Default Title","offer_id":67922693226716,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/1763\/1964\/files\/din934-hss-4-ko-pin-cold-forming-rear-back-punch-pin-5018659.jpg?v=1793174886","url":"https:\/\/hengfamold.com\/tr\/products\/din934-hss-4-ko-pin-cold-forming-rear-back-punch-pin","provider":"HengfaMold","version":"1.0","type":"link"}