{"product_id":"spi-91-389-7-feeler-gage-0-04-in-parallel-leaf-tempered-steel","title":"Spi 91-389-7 Feeler Gage 0.04 in Parallel Leaf Tempered Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 91-389-7 is a parallel-leaf feeler gage used to measure precise gaps, clearances, and tolerances in mechanical assemblies. The leaf measures 0.04 inches thick, 0.5 inches wide, and 12 inches long, providing a consistent cross-section across the full length of the blade. Constructed from tempered steel, it delivers the hardness and rigidity required for accurate, repeatable measurements in field and shop environments. HVAC technicians, plumbers, and general mechanical trades use feeler gages when setting burner electrode gaps, valve clearances, and flue tolerances. This single-leaf gage is suited for tasks requiring a specific thickness without flipping through a multi-blade set.\u003c\/p\u003e\u003cp\u003eThe 91-389-7 is appropriate for residential and light commercial service work wherever precise gap measurement is required. Common applications include setting igniter and electrode clearances on gas-fired equipment, checking compressor valve plate clearances, verifying flange fitment, and inspecting machined surfaces for flatness. The parallel leaf style means the blade maintains a uniform 0.04-inch thickness from tip to base, eliminating taper-related measurement error across the full 12-inch length.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eParallel leaf design maintains consistent 0.04-inch thickness across the full 12-inch blade length\u003c\/li\u003e\n\u003cli\u003eTempered steel construction resists deformation under repeated use\u003c\/li\u003e\n\u003cli\u003e0.5-inch blade width provides a stable contact surface for gap measurement\u003c\/li\u003e\n\u003cli\u003e12-inch length allows reach into deeper assemblies without requiring extensions\u003c\/li\u003e\n\u003cli\u003eSingle-leaf format for quick, dedicated use at a fixed thickness\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose feeler gage blade suited for gap and clearance measurement tasks common across HVAC, plumbing, and mechanical trade applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eFeeler gages are measurement tools installed by HVAC technicians, plumbers, and mechanical service professionals. Always de-energize and lock out equipment before inserting a feeler gage into any gap near moving parts or live electrical components. Clean contact surfaces before measurement to avoid false readings caused by debris or corrosion. Do not force or bend the blade, as permanent deformation will compromise accuracy.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.04 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: Tempered Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.051 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 91-389-7\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51690282910002,"sku":"91-389-7","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2816d61cea976c3c7a182305b13bf630.jpg?v=1788268130","url":"https:\/\/voomisupply.com\/products\/spi-91-389-7-feeler-gage-0-04-in-parallel-leaf-tempered-steel","provider":"Voomi Supply","version":"1.0","type":"link"}