{"product_id":"spi-91-378-0-feeler-gage-0-025-in-parallel-leaf-steel","title":"Spi 91-378-0 Feeler Gage 0.025 in Parallel Leaf Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 91-378-0 is a parallel-leaf feeler gage used to measure narrow gaps, clearances, and tolerances in mechanical assemblies. The blade measures 0.025 inches thick, 0.5 inches wide, and 12 inches long, giving technicians a consistent, full-length contact surface for accurate readings. Constructed from high carbon steel, the leaf resists wear and holds its dimension under repeated use. This type of gage is a standard hand tool for HVAC, engine, and general mechanical service where precise gap measurement is required before or after adjustment.\u003c\/p\u003e\n\u003cp\u003eFeeler gages like the 91-378-0 are used across residential and commercial HVAC service, engine valve adjustment, compressor assembly, and general precision maintenance. The 12-inch parallel leaf design suits applications where a straight, consistent blade profile is necessary from tip to handle. Technicians reach for this gage when checking spark plug gaps, valve clearances, bearing fits, and similar close-tolerance specifications during installation or preventive maintenance.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e0.025-inch blade thickness for measuring close-tolerance gaps\u003c\/li\u003e\n  \u003cli\u003eParallel leaf style provides a consistent cross-section along the full 12-inch length\u003c\/li\u003e\n  \u003cli\u003eHigh carbon steel construction for durability and dimensional stability\u003c\/li\u003e\n  \u003cli\u003e0.5-inch blade width offers stable surface contact during measurement\u003c\/li\u003e\n  \u003cli\u003eSingle-leaf format allows direct use without disassembly from a set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose parallel-leaf feeler gage suitable for any application requiring a 0.025-inch gap measurement with a 12-inch blade length.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eFeeler gages are hand tools requiring no installation; however, they should be kept clean and lightly oiled to prevent corrosion and maintain accuracy. When measuring gaps, insert the blade without forcing it — the correct gage thickness produces light drag with no bending of the leaf. Store flat and away from moisture to prevent warping of the high carbon steel blade.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.025 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 12 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLeaf Style\u003c\/strong\u003e: Parallel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: High Carbon Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.039 pounds\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: 91-378-0\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51689330802994,"sku":"91-378-0","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/14166e1d4ec317759f98e5079ba80b20.jpg?v=1788257698","url":"https:\/\/voomisupply.com\/products\/spi-91-378-0-feeler-gage-0-025-in-parallel-leaf-steel","provider":"Voomi Supply","version":"1.0","type":"link"}