{"product_id":"ngk-7421-bmr6a-nickel-spark-plug","title":"NGK 7421 BMR6A Nickel Spark Plug","description":"\u003ch3 data-section-id=\"3h1ku8\" data-start=\"43\" data-end=\"58\"\u003eDescription\u003c\/h3\u003e\n\u003cp data-start=\"59\" data-end=\"427\"\u003eThe \u003cstrong data-start=\"63\" data-end=\"90\"\u003eNGK BMR6A (Stock #7421)\u003c\/strong\u003e is a \u003cstrong data-start=\"96\" data-end=\"140\"\u003ecompact, resistor-type nickel spark plug\u003c\/strong\u003e designed primarily for \u003cstrong data-start=\"164\" data-end=\"235\"\u003esmall engines, lawn \u0026amp; garden equipment, and industrial applications\u003c\/strong\u003e. Built with a \u003cstrong data-start=\"250\" data-end=\"265\"\u003ecopper core\u003c\/strong\u003e, \u003cstrong data-start=\"267\" data-end=\"287\"\u003enickel electrode\u003c\/strong\u003e, and \u003cstrong data-start=\"293\" data-end=\"307\"\u003e0.7 mm gap\u003c\/strong\u003e, it delivers reliable ignition, efficient heat dissipation, and consistent performance in smaller displacement engines.\u003c\/p\u003e\n\u003chr data-start=\"429\" data-end=\"432\"\u003e\n\u003ch3 data-section-id=\"1iz91iu\" data-start=\"434\" data-end=\"450\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"451\" data-end=\"965\"\u003e\n\u003cli data-section-id=\"1pjj2st\" data-start=\"451\" data-end=\"513\"\u003e\n\u003cstrong data-start=\"453\" data-end=\"483\"\u003eStandard nickel spark plug\u003c\/strong\u003e for dependable everyday use\u003c\/li\u003e\n\u003cli data-section-id=\"r2cv4\" data-start=\"514\" data-end=\"578\"\u003e\n\u003cstrong data-start=\"516\" data-end=\"531\"\u003eCopper core\u003c\/strong\u003e improves heat transfer and engine efficiency\u003c\/li\u003e\n\u003cli data-section-id=\"f9cr6f\" data-start=\"579\" data-end=\"646\"\u003e\n\u003cstrong data-start=\"581\" data-end=\"601\"\u003e10k ohm resistor\u003c\/strong\u003e helps reduce electrical interference (RFI)\u003c\/li\u003e\n\u003cli data-section-id=\"1yvbfhw\" data-start=\"647\" data-end=\"726\"\u003e\n\u003cstrong data-start=\"649\" data-end=\"675\"\u003eRemovable terminal nut\u003c\/strong\u003e for compatibility with different plug wire types\u003c\/li\u003e\n\u003cli data-section-id=\"an7sm\" data-start=\"727\" data-end=\"788\"\u003e\n\u003cstrong data-start=\"729\" data-end=\"756\"\u003eTrivalent metal plating\u003c\/strong\u003e resists corrosion and seizure\u003c\/li\u003e\n\u003cli data-section-id=\"1bsvwgo\" data-start=\"789\" data-end=\"830\"\u003e\n\u003cstrong data-start=\"791\" data-end=\"810\"\u003eCorrugated ribs\u003c\/strong\u003e prevent flashover\u003c\/li\u003e\n\u003cli data-section-id=\"1b5rcyd\" data-start=\"831\" data-end=\"893\"\u003e\n\u003cstrong data-start=\"833\" data-end=\"858\"\u003eTriple sealing system\u003c\/strong\u003e helps prevent combustion leakage\u003c\/li\u003e\n\u003cli data-section-id=\"1ni4lwt\" data-start=\"894\" data-end=\"965\"\u003eDesigned for \u003cstrong data-start=\"909\" data-end=\"945\"\u003esmall engine \/ utility equipment\u003c\/strong\u003e, not automotive use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"967\" data-end=\"970\"\u003e\n\u003ch3 data-section-id=\"1yl5694\" data-start=\"972\" data-end=\"990\"\u003eSpecifications\u003c\/h3\u003e\n\u003cp data-start=\"992\" data-end=\"1003\"\u003e\u003cstrong data-start=\"992\" data-end=\"1003\"\u003eGeneral\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1004\" data-end=\"1284\"\u003e\n\u003cli data-section-id=\"gzqtyk\" data-start=\"1004\" data-end=\"1028\"\u003ePart Number: \u003cstrong data-start=\"1019\" data-end=\"1028\"\u003eBMR6A\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"cw70z5\" data-start=\"1029\" data-end=\"1053\"\u003eStock Number: \u003cstrong data-start=\"1045\" data-end=\"1053\"\u003e7421\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1nvw1rf\" data-start=\"1054\" data-end=\"1070\"\u003eBrand: \u003cstrong data-start=\"1063\" data-end=\"1070\"\u003eNGK\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"s51f5u\" data-start=\"1071\" data-end=\"1094\"\u003ePlug Type: \u003cstrong data-start=\"1084\" data-end=\"1094\"\u003eNickel\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ajks3n\" data-start=\"1095\" data-end=\"1114\"\u003eHeat Range: \u003cstrong data-start=\"1109\" data-end=\"1114\"\u003e6\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"60umju\" data-start=\"1115\" data-end=\"1134\"\u003eResistor: \u003cstrong data-start=\"1127\" data-end=\"1134\"\u003eYes\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ovkpce\" data-start=\"1135\" data-end=\"1164\"\u003eResistor Value: \u003cstrong data-start=\"1153\" data-end=\"1164\"\u003e10k Ohm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"11zky16\" data-start=\"1165\" data-end=\"1191\"\u003eGap: \u003cstrong data-start=\"1172\" data-end=\"1191\"\u003e0.028\" (0.7 mm)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"vwgdor\" data-start=\"1192\" data-end=\"1260\"\u003eLongevity: \u003cstrong data-start=\"1205\" data-end=\"1260\"\u003e~30,000 miles \/ typical service interval equivalent\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"d29be7\" data-start=\"1261\" data-end=\"1284\"\u003eWarranty: \u003cstrong data-start=\"1273\" data-end=\"1284\"\u003e60 Days\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1286\" data-end=\"1295\"\u003e\u003cstrong data-start=\"1286\" data-end=\"1295\"\u003eShell\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1296\" data-end=\"1519\"\u003e\n\u003cli data-section-id=\"15aa0u6\" data-start=\"1296\" data-end=\"1324\"\u003eThread Diameter: \u003cstrong data-start=\"1315\" data-end=\"1324\"\u003e14 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1q2cc9u\" data-start=\"1325\" data-end=\"1352\"\u003eThread Pitch: \u003cstrong data-start=\"1341\" data-end=\"1352\"\u003e1.25 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"d38o9y\" data-start=\"1353\" data-end=\"1376\"\u003eSeat Type: \u003cstrong data-start=\"1366\" data-end=\"1376\"\u003eGasket\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"ocd62\" data-start=\"1377\" data-end=\"1403\"\u003eReach: \u003cstrong data-start=\"1386\" data-end=\"1403\"\u003e9.5 mm (3\/8\")\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1bfg275\" data-start=\"1404\" data-end=\"1432\"\u003eHex Size: \u003cstrong data-start=\"1416\" data-end=\"1432\"\u003e3\/4\" (19 mm)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"vsx8fc\" data-start=\"1433\" data-end=\"1467\"\u003eTerminal Type: \u003cstrong data-start=\"1450\" data-end=\"1467\"\u003eRemovable Nut\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"8djpsu\" data-start=\"1468\" data-end=\"1519\"\u003eOverall Height: \u003cstrong data-start=\"1486\" data-end=\"1519\"\u003eBantam (short\/compact design)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1521\" data-end=\"1541\"\u003e\u003cstrong data-start=\"1521\" data-end=\"1541\"\u003eCenter Electrode\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1542\" data-end=\"1636\"\u003e\n\u003cli data-section-id=\"1o0d2wv\" data-start=\"1542\" data-end=\"1564\"\u003eMaterial: \u003cstrong data-start=\"1554\" data-end=\"1564\"\u003eNickel\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"fpnzht\" data-start=\"1565\" data-end=\"1585\"\u003eType: \u003cstrong data-start=\"1573\" data-end=\"1585\"\u003eStandard\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"jtgltq\" data-start=\"1586\" data-end=\"1604\"\u003eSize: \u003cstrong data-start=\"1594\" data-end=\"1604\"\u003e2.5 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1rxmm2h\" data-start=\"1605\" data-end=\"1636\"\u003eProjection: \u003cstrong data-start=\"1619\" data-end=\"1636\"\u003eNon-Projected\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1638\" data-end=\"1658\"\u003e\u003cstrong data-start=\"1638\" data-end=\"1658\"\u003eGround Electrode\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1659\" data-end=\"1720\"\u003e\n\u003cli data-section-id=\"1o0d2wv\" data-start=\"1659\" data-end=\"1681\"\u003eMaterial: \u003cstrong data-start=\"1671\" data-end=\"1681\"\u003eNickel\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"fpnzht\" data-start=\"1682\" data-end=\"1702\"\u003eType: \u003cstrong data-start=\"1690\" data-end=\"1702\"\u003eStandard\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"cezifs\" data-start=\"1703\" data-end=\"1720\"\u003eQuantity: \u003cstrong data-start=\"1715\" data-end=\"1720\"\u003e1\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1722\" data-end=\"1738\"\u003e\u003cstrong data-start=\"1722\" data-end=\"1738\"\u003eTorque Specs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1739\" data-end=\"1799\"\u003e\n\u003cli data-section-id=\"1faznx8\" data-start=\"1739\" data-end=\"1769\"\u003eCast Iron: \u003cstrong data-start=\"1752\" data-end=\"1769\"\u003e18–25.3 lb-ft\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1hau3t4\" data-start=\"1770\" data-end=\"1799\"\u003eAluminum: \u003cstrong data-start=\"1782\" data-end=\"1799\"\u003e18–21.6 lb-ft\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1801\" data-end=\"1804\"\u003e\n\u003ch3 data-section-id=\"19i0hl8\" data-start=\"1806\" data-end=\"1826\"\u003eFitment Overview\u003c\/h3\u003e\n\u003cp data-start=\"1828\" data-end=\"1883\"\u003e\u003cstrong data-start=\"1828\" data-end=\"1883\"\u003eNot intended for automotive or powersports vehicles\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1885\" data-end=\"1910\"\u003e\u003cstrong data-start=\"1885\" data-end=\"1910\"\u003ePrimary Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1911\" data-end=\"2172\"\u003e\n\u003cli data-section-id=\"hygj2v\" data-start=\"1911\" data-end=\"1994\"\u003e\n\u003cstrong data-start=\"1913\" data-end=\"1948\"\u003eCommercial \u0026amp; Industrial Engines\u003c\/strong\u003e\n\u003cul data-start=\"1951\" data-end=\"1994\"\u003e\n\u003cli data-section-id=\"wykxsi\" data-start=\"1951\" data-end=\"1969\"\u003eHomelite FP250\u003c\/li\u003e\n\u003cli data-section-id=\"1gcbp1p\" data-start=\"1972\" data-end=\"1994\"\u003eSubaru-Robin EC13V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"gax71u\" data-start=\"1996\" data-end=\"2172\"\u003e\n\u003cstrong data-start=\"1998\" data-end=\"2025\"\u003eLawn \u0026amp; Garden Equipment\u003c\/strong\u003e\n\u003cul data-start=\"2028\" data-end=\"2172\"\u003e\n\u003cli data-section-id=\"rdu706\" data-start=\"2028\" data-end=\"2172\"\u003eTanaka hedge trimmers and brush cutters\n\u003cul data-start=\"2076\" data-end=\"2172\"\u003e\n\u003cli data-section-id=\"74gt8c\" data-start=\"2076\" data-end=\"2114\"\u003eTBC-225, TBC-245, TBC-260, TBC2500\u003c\/li\u003e\n\u003cli data-section-id=\"43b6lx\" data-start=\"2119\" data-end=\"2172\"\u003eTBC-2501, TBC-270, TBC290, TBC340PF\/D, TBC250PF\/D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2174\" data-end=\"2177\"\u003e\n\u003ch3 data-section-id=\"n0zlr1\" data-start=\"2179\" data-end=\"2200\"\u003ePerformance Notes\u003c\/h3\u003e\n\u003cul data-start=\"2201\" data-end=\"2439\"\u003e\n\u003cli data-section-id=\"oq6ht6\" data-start=\"2201\" data-end=\"2282\"\u003eDesigned specifically for \u003cstrong data-start=\"2229\" data-end=\"2282\"\u003esmall displacement engines and handheld equipment\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"p4chhz\" data-start=\"2283\" data-end=\"2377\"\u003eThe \u003cstrong data-start=\"2289\" data-end=\"2311\"\u003eshort 9.5 mm reach\u003c\/strong\u003e and compact design make it unsuitable for most automotive engines\u003c\/li\u003e\n\u003cli data-section-id=\"1nx3vru\" data-start=\"2378\" data-end=\"2439\"\u003eAlways verify \u003cstrong data-start=\"2394\" data-end=\"2419\"\u003eOEM plug spec and gap\u003c\/strong\u003e before installation\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":46445285507271,"sku":"ELE2203","price":2.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/2277\/5751\/files\/Screenshot2026-04-23102317_c7382a93-e913-4cf4-9cd7-a302307e0239.png?v=1776969284","url":"https:\/\/mainstreeteshop.com\/products\/ngk-7421-bmr6a-nickel-spark-plug","provider":"MAIN STREET ESHOP","version":"1.0","type":"link"}