{"product_id":"fowler-52-437-250-0-alloy-steel-parallel-set-18-piece","title":"Fowler 52-437-250-0 Alloy Steel Parallel Set 18 Piece","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe FOWLER 52-437-250-0 is an 18-piece alloy steel parallel set designed for precision machining and setup work in professional machine shops and tool rooms. Sold as 9 matched pairs, each parallel measures 6 inches in length and 1\/4 inch in thickness, with heights ranging from 3\/4 inch to 1-3\/4 inch in 1\/8-inch increments. The set is hardened to 52-58 HRC and holds a parallelism tolerance of 0.0002 inches, making it suitable for demanding workholding and inspection applications. Each parallel includes two drilled holes for easy handling and retrieval from vises. The set ships in a storage case.\u003c\/p\u003e\n\u003cp\u003eThis parallel set is used to support and elevate workpieces in milling vises, surface grinders, and inspection setups. The range of heights across 9 pairs gives machinists and toolmakers the flexibility to handle a wide variety of part geometries. Typical users include CNC and manual mill operators, grinder operators, and quality control technicians who need repeatable, accurate workpiece positioning. The 6-inch length provides stable support across standard milling vise jaws.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e18 pieces (9 matched pairs) covering heights from 3\/4 inch to 1-3\/4 inch in 1\/8-inch increments\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction hardened to 52-58 HRC for durability and wear resistance\u003c\/li\u003e\n  \u003cli\u003eParallelism tolerance of 0.0002 inches for precise workpiece positioning\u003c\/li\u003e\n  \u003cli\u003eEach parallel features two drilled holes for magnet or hook retrieval from vises\u003c\/li\u003e\n  \u003cli\u003e6-inch length suits standard milling vise jaw widths\u003c\/li\u003e\n  \u003cli\u003eIncludes storage case to keep pairs organized and protected\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose precision parallel set for use with standard milling vises, surface grinders, and machine shop inspection fixtures requiring workpiece support in the 3\/4-inch to 1-3\/4-inch height range.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eParallel sets are installed by machinists and toolmakers as part of workholding setup. Always clean vise jaws and parallel surfaces before use to ensure accurate seating. Never use parallels as striking surfaces or pry tools, as impact can compromise hardness and geometry. Inspect pairs periodically for wear or nicks that could affect parallelism accuracy.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Pieces\u003c\/strong\u003e: 18 (9 pairs)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Height\u003c\/strong\u003e: 3\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Height\u003c\/strong\u003e: 1-3\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight Increments\u003c\/strong\u003e: 1\/8 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParallelism\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 52-58 HRC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 10.2 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes\u003c\/strong\u003e: Storage case, 2 drilled holes in each parallel\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: FOWLER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 52-437-250-0\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"FOWLER","offers":[{"title":"Default Title","offer_id":67918519206194,"sku":"52-437-250-0","price":660.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/92679df8d3cc62248848ead83e333f2e.jpg?v=1791270702","url":"https:\/\/voomisupply.com\/products\/fowler-52-437-250-0-alloy-steel-parallel-set-18-piece","provider":"Voomi Supply","version":"1.0","type":"link"}