{"id":4159,"date":"2026-01-19T14:40:29","date_gmt":"2026-01-19T06:40:29","guid":{"rendered":"https:\/\/atfits.com\/?post_type=product&p=4159"},"modified":"2026-01-19T14:40:29","modified_gmt":"2026-01-19T06:40:29","slug":"smc-kq2s04-m3g-hexagon-socket-head-male-connector","status":"publish","type":"product","link":"https:\/\/atfits.com\/es\/producto\/smc-kq2s04-m3g-hexagon-socket-head-male-connector\/","title":{"rendered":"SMC KQ2S04-M3G Hexagon Socket Head Male Connector"},"content":{"rendered":"

SMC KQ2S04-M3G Hexagon Socket Head Male Connector<\/h1>\n
<\/div>\n

1. Product Overview<\/h2>\n
<\/div>\n
The SMC KQ2S04-M3G is a compact straight one-touch pneumatic connector from the KQ2 series, designed for seamless, tool-free connection between 4 mm outer diameter (OD) pneumatic tubing and M3 male threaded ports. Featuring a hexagon socket head for secure installation in confined spaces, this connector is optimized for small-scale automation systems, laboratory equipment, and precision instrumentation where minimal space and reliable airtight connections are critical. Its lightweight construction and corrosion-resistant materials ensure stable performance across vacuum and positive pressure applications, with compatibility for multiple tubing types to meet diverse industrial and experimental needs.<\/div>\n
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2. Main Functions<\/h2>\n
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\n
\n\n\n\n\n\n\n\n\n\n
Function<\/th>\nDetailed Description<\/th>\n<\/tr>\n<\/thead>\n
Tool-Free 4 mm Tube Connection<\/td>\nPush-in design enables instant insertion and locking of 4 mm OD tubing; the internal collet mechanism provides firm clamping force without requiring tools, reducing assembly time and labor costs.<\/td>\n<\/tr>\n
Space-Saving Hexagon Socket Installation<\/td>\nThe hexagon socket head allows for secure fastening with an Allen key, making it ideal for installation in tight spaces where standard wrench access is limited.<\/td>\n<\/tr>\n
Leak-Free Threaded Interface<\/td>\nM3 male thread ensures precise connection to small-diameter ports on valves, sensors, or miniature actuators, delivering airtight performance for low-flow pneumatic circuits.<\/td>\n<\/tr>\n
Quick Tubing Disconnection<\/td>\nA simple push on the release collar disengages the collet, allowing fast tubing removal for system maintenance, reconfiguration, or component replacement without damage.<\/td>\n<\/tr>\n
Vacuum & Positive Pressure Compatibility<\/td>\nSupports operation across a wide pressure range, from full vacuum (-100 kPa) to positive pressure (1.0 MPa), suitable for both suction-based pick-and-place and small-actuator control applications.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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<\/div>\n

3. Technical Features<\/h2>\n
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    \n
  1. Miniature Compact Design<\/strong>: Ultra-small profile with minimal axial and radial dimensions, making it suitable for integration into dense automation setups and precision equipment with limited installation space.<\/li>\n
  2. Corrosion-Resistant Materials<\/strong>: Brass body with electroless nickel plating resists rust and chemical contaminants; stainless steel (SUS304) collet and chuck components enhance wear resistance and durability.<\/li>\n
  3. Multi-Tubing Compatibility<\/strong>: Works with 4 mm OD tubing made of polyurethane (PU), nylon, and polyethylene (PE), providing flexibility for different application requirements (e.g., flexibility, chemical resistance).<\/li>\n
  4. Integrated Sealing System<\/strong>: Built-in nitrile rubber (NBR) seals ensure leak-free performance, eliminating the need for additional gaskets or sealants and simplifying installation.<\/li>\n
  5. Wide Operating Conditions<\/strong>: Functions reliably at temperatures ranging from -5\u00b0C to 60\u00b0C, adapting to typical industrial and laboratory environments with non-condensing humidity.<\/li>\n
  6. High Safety Rating<\/strong>: Boasts a 3.0 MPa proof pressure (at 23\u00b0C), ensuring structural integrity and preventing failure during pressure testing or unexpected pressure spikes.<\/li>\n
  7. RoHS Compliance<\/strong>: Meets international environmental standards, free of restricted hazardous substances, suitable for eco-friendly manufacturing and research facilities.<\/li>\n<\/ol>\n
    <\/div>\n
    \n
    <\/div>\n

    4. Product Dimensions (Unit: mm)<\/h2>\n
    <\/div>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n\n\n
    Dimension Parameter<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
    Tube Outer Diameter Compatibility<\/td>\n4<\/td>\n<\/tr>\n
    Thread Specification<\/td>\nM3 Male<\/td>\n<\/tr>\n
    Thread Length<\/td>\n5<\/td>\n<\/tr>\n
    Hexagon Socket Size<\/td>\n2.5 (Allen Key Compatible)<\/td>\n<\/tr>\n
    Overall Length (Thread End to Tube End)<\/td>\n22<\/td>\n<\/tr>\n
    Maximum Body Diameter<\/td>\n10<\/td>\n<\/tr>\n
    Release Collar Diameter<\/td>\n12<\/td>\n<\/tr>\n
    Minimum Mounting Clearance (Allen Key Access)<\/td>\n15<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    <\/div>\n
    \n
    <\/div>\n

    5. Weight and Material Specifications<\/h2>\n
    <\/div>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n
    Component<\/th>\nMaterial<\/th>\nWeight (g)<\/th>\n<\/tr>\n<\/thead>\n
    Main Body<\/td>\nBrass (Electroless Nickel Plated)<\/td>\n6<\/td>\n<\/tr>\n
    Collet & Chuck<\/td>\nSUS304 Stainless Steel<\/td>\n1<\/td>\n<\/tr>\n
    Release Collar<\/td>\nReinforced Engineering Plastic<\/td>\n1<\/td>\n<\/tr>\n
    Seal Ring<\/td>\nNitrile Rubber (NBR)<\/td>\n0.5<\/td>\n<\/tr>\n
    Hexagon Socket Insert<\/td>\nBrass<\/td>\n0.5<\/td>\n<\/tr>\n
    Total Weight (Assembly)<\/strong><\/td>\n–<\/td>\n9<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    <\/div>\n
    \n
    <\/div>\n

    6. Key Performance Parameters<\/h2>\n
    <\/div>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Parameter<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
    Operating Pressure Range<\/td>\n-100 kPa to 1.0 MPa<\/td>\n<\/tr>\n
    Proof Pressure (23\u00b0C)<\/td>\n3.0 MPa<\/td>\n<\/tr>\n
    Operating Temperature Range<\/td>\n-5\u00b0C to 60\u00b0C<\/td>\n<\/tr>\n
    Fluid Compatibility<\/td>\nFiltered Compressed Air, Non-Freezing Water<\/td>\n<\/tr>\n
    Connection Torque (M3 Thread)<\/td>\n1.5\u20132.0 N\u00b7m<\/td>\n<\/tr>\n
    Service Life<\/td>\n\u226550,000 Insertion\/Removal Cycles<\/td>\n<\/tr>\n
    Leakage Rate<\/td>\n\u22640.5 cm\u00b3\/min (at 0.6 MPa)<\/td>\n<\/tr>\n
    Tubing Material Compatibility<\/td>\nPU, Nylon, PE (4 mm OD)<\/td>\n<\/tr>\n
    Environmental Compliance<\/td>\nRoHS Compliant<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

    SMC KQ2S04-M3G Hexagon Socket Head Male Connector 1. Product Overview The SMC KQ2S04-M3G is a compact straight one-touch pneumatic connector<\/p>","protected":false},"featured_media":4160,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[95],"product_tag":[],"class_list":{"0":"post-4159","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-smc","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"yoast_head":"\nSMC KQ2S04-M3G Hexagon Socket Head Male Connector - Autofits<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atfits.com\/es\/producto\/smc-kq2s04-m3g-hexagon-socket-head-male-connector\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SMC KQ2S04-M3G Hexagon Socket Head Male Connector - Autofits\" \/>\n<meta property=\"og:description\" content=\"SMC KQ2S04-M3G Hexagon Socket Head Male Connector 1. 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