{"product_id":"spi-91-339-2-screw-jack-set-3-to-4-inch-4-piece","title":"Spi 91-339-2 Screw Jack Set 3 to 4 Inch 4 Piece","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 91-339-2 is a four-piece screw jack set designed to provide adjustable support and leveling for machinery, equipment, and workpieces in shop, maintenance, and fabrication environments. Each jack adjusts from 3 to 4 inches in height, allowing precise vertical positioning across a range of applications. The set weighs 3 pounds and is sold as a complete unit of four jacks, making it ready for immediate use in setups requiring multiple support points. Licensed machinists, millwrights, and maintenance technicians commonly use screw jack sets for machine leveling, workholding, and fixture support tasks.\u003c\/p\u003e\n\u003cp\u003eThis set is suited for use in machine shops, manufacturing facilities, and maintenance environments where stable, adjustable support is needed beneath equipment or workpieces. The four-piece configuration allows balanced support at multiple contact points during setup, alignment, and leveling operations. It is appropriate for both bench-top and floor-level applications where height adjustment between 3 and 4 inches is required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFour-piece set provides multiple support points for balanced equipment leveling\u003c\/li\u003e\n  \u003cli\u003eAdjustable height range from 3 to 4 inches per jack\u003c\/li\u003e\n  \u003cli\u003eCompact size suitable for bench and floor-level setups\u003c\/li\u003e\n  \u003cli\u003eSold as a complete set for immediate multi-point support applications\u003c\/li\u003e\n  \u003cli\u003eLightweight at 3 pounds for the full set, easy to transport and store\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose screw jack set for use in machine shop, fabrication, and industrial maintenance applications requiring adjustable support between 3 and 4 inches in height.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by machinists or maintenance technicians. Before placing jacks under equipment, ensure the load is de-energized and properly stabilized to prevent uncontrolled movement. Jacks should be positioned on a flat, clean surface and adjusted evenly to distribute load across all four points. Do not exceed the rated load capacity of each jack during use.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Pieces\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Height\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Height\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 24101635\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 91-339-2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51723482431794,"sku":"91-339-2","price":38.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6434abd0ba429c6edfe79b434b08f799.jpg?v=1788605402","url":"https:\/\/voomisupply.com\/products\/spi-91-339-2-screw-jack-set-3-to-4-inch-4-piece","provider":"Voomi Supply","version":"1.0","type":"link"}