{"product_id":"proto-j406a-c-clamp-6600-lb-extra-heavy-duty-forged-steel","title":"Proto J406A C-clamp 6600 Lb Extra Heavy-duty Forged Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PROTO J406A is an extra heavy-duty C-clamp designed for demanding industrial and trade applications where high clamping force and structural integrity are required. Built from forged steel with a steel anvil and body, this clamp delivers a maximum clamping pressure of 6600 pounds. The swivel pad clamping surface provides consistent, smooth contact across the workpiece, reducing the risk of surface damage during clamping operations. At 6.286 pounds, the J406A is a solid-duty tool suited for fabrication, welding, ironwork, and heavy mechanical assembly tasks. It is installed and used by professionals who require reliable holding force in high-load scenarios.\u003c\/p\u003e\u003cp\u003eThe J406A is suited for industrial fabrication shops, structural steel work, mechanical assembly, and heavy-duty maintenance environments. It accommodates a maximum opening capacity of 6 inches with a standard throat depth, making it appropriate for clamping thick stock, structural members, or assembled components during welding, drilling, or fastening operations. Its extra heavy-duty rating positions it for commercial and industrial use rather than light-duty or general-purpose applications.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e6600 lb clamping pressure rated for extra heavy-duty load applications\u003c\/li\u003e\n\u003cli\u003eForged steel construction for high strength and durability under sustained clamping force\u003c\/li\u003e\n\u003cli\u003eMaximum opening capacity of 6 inches with standard throat depth\u003c\/li\u003e\n\u003cli\u003eSmooth swivel pad clamping surface for even contact on workpieces\u003c\/li\u003e\n\u003cli\u003eSteel body and steel anvil material for consistent performance under heavy loads\u003c\/li\u003e\n\u003cli\u003eWeighs 6.286 pounds, reflecting solid forged construction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use extra heavy-duty C-clamp suitable for industrial fabrication, structural assembly, and heavy mechanical service applications requiring up to 6600 lb of clamping force.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eC-clamps of this class are typically deployed by ironworkers, welders, millwrights, and heavy mechanical technicians. Ensure the workpiece and clamping surfaces are clean and free of debris before applying clamping force to prevent slippage or surface damage. Do not exceed the rated 6600 lb clamping pressure, and do not use extension bars or cheater pipes on the handle to increase torque beyond the designed operating range. Inspect the swivel pad and screw threads for wear or damage before each use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamp Type\u003c\/strong\u003e: C-Clamp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e: Forged Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnvil Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication Strength\u003c\/strong\u003e: Extra Heavy-Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Clamping Pressure\u003c\/strong\u003e: 6600 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Opening Capacity\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Opening Capacity\u003c\/strong\u003e: 0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThroat Depth Style\u003c\/strong\u003e: Standard Depth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamping Surface Type\u003c\/strong\u003e: Swivel Pad\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamping Surface Texture\u003c\/strong\u003e: Smooth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 6.286 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112120\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: PROTO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: J406A\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PROTO","offers":[{"title":"Default Title","offer_id":51543621632306,"sku":"J406A","price":81.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b42dec9fd5e0d74f699c4552286b9387.jpg?v=1785920979","url":"https:\/\/voomisupply.com\/products\/proto-j406a-c-clamp-6600-lb-extra-heavy-duty-forged-steel","provider":"Voomi Supply","version":"1.0","type":"link"}