{"product_id":"4255-708-3105","title":"4255 708 3105 – STIHL Union Nut Genuine OEM Part","description":"\u003ch2 data-start=\"94\" data-end=\"149\"\u003e\u003cstrong data-start=\"97\" data-end=\"149\"\u003e4255 708 3105 – STIHL Union Nut Genuine OEM Part\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-start=\"151\" data-end=\"453\"\u003eThe \u003cstrong data-start=\"155\" data-end=\"188\"\u003eSTIHL Union Nut 4255 708 3105\u003c\/strong\u003e is a genuine OEM fastening component designed for select STIHL sprayers, including \u003cstrong data-start=\"272\" data-end=\"317\"\u003eSG 71, SG 51, SGA 85, and SGA 85.0 models\u003c\/strong\u003e. This union nut secures spray system connections, ensuring tight, leak-free fittings and consistent spray performance during operation.\u003c\/p\u003e\n\u003cp data-start=\"455\" data-end=\"772\"\u003eUnion nuts are essential for maintaining sealed connections between hoses, spray guns, and lances. Over time, fastening nuts may become worn, cracked, stripped, or damaged due to repeated tightening, vibration, or chemical exposure. A damaged union nut can lead to leaks, pressure loss, or unstable spray connections.\u003c\/p\u003e\n\u003cp data-start=\"774\" data-end=\"931\"\u003eReplacing the union nut with the correct genuine STIHL OEM part restores proper connection integrity, pressure retention, and dependable sprayer performance.\u003c\/p\u003e\n\u003cp data-start=\"933\" data-end=\"1131\"\u003eManufactured to STIHL factory specifications, this OEM union nut ensures precise fitment, secure fastening strength, and long-term durability under demanding agricultural and landscaping conditions.\u003c\/p\u003e\n\u003chr data-start=\"1133\" data-end=\"1136\"\u003e\n\u003ch3 data-start=\"1138\" data-end=\"1161\"\u003e\u003cstrong data-start=\"1142\" data-end=\"1161\"\u003eProduct Details\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1163\" data-end=\"1362\"\u003e\n\u003cli data-start=\"1163\" data-end=\"1197\"\u003e\n\u003cp data-start=\"1165\" data-end=\"1197\"\u003e\u003cstrong data-start=\"1165\" data-end=\"1181\"\u003ePart Number:\u003c\/strong\u003e 4255 708 3105\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1198\" data-end=\"1218\"\u003e\n\u003cp data-start=\"1200\" data-end=\"1218\"\u003e\u003cstrong data-start=\"1200\" data-end=\"1210\"\u003eBrand:\u003c\/strong\u003e STIHL\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1219\" data-end=\"1263\"\u003e\n\u003cp data-start=\"1221\" data-end=\"1263\"\u003e\u003cstrong data-start=\"1221\" data-end=\"1235\"\u003ePart Type:\u003c\/strong\u003e Union Nut \/ Fastening Nut\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1264\" data-end=\"1322\"\u003e\n\u003cp data-start=\"1266\" data-end=\"1322\"\u003e\u003cstrong data-start=\"1266\" data-end=\"1282\"\u003eApplication:\u003c\/strong\u003e Spray gun and lance connection system\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1323\" data-end=\"1362\"\u003e\n\u003cp data-start=\"1325\" data-end=\"1362\"\u003e\u003cstrong data-start=\"1325\" data-end=\"1339\"\u003eCondition:\u003c\/strong\u003e New Genuine OEM Part\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1364\" data-end=\"1367\"\u003e\n\u003ch3 data-start=\"1369\" data-end=\"1385\"\u003e\u003cstrong data-start=\"1373\" data-end=\"1385\"\u003eFunction\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1387\" data-end=\"1628\"\u003e\n\u003cli data-start=\"1387\" data-end=\"1435\"\u003e\n\u003cp data-start=\"1389\" data-end=\"1435\"\u003eSecures hose and spray gun\/lance connections\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1436\" data-end=\"1474\"\u003e\n\u003cp data-start=\"1438\" data-end=\"1474\"\u003eMaintains leak-free fluid transfer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1475\" data-end=\"1522\"\u003e\n\u003cp data-start=\"1477\" data-end=\"1522\"\u003ePrevents pressure loss at connection points\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1523\" data-end=\"1577\"\u003e\n\u003cp data-start=\"1525\" data-end=\"1577\"\u003eReplaces cracked, stripped, or worn fastening nuts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1578\" data-end=\"1628\"\u003e\n\u003cp data-start=\"1580\" data-end=\"1628\"\u003eSupports stable and reliable sprayer operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1630\" data-end=\"1695\"\u003e⚠️ A damaged union nut may cause leaks or reduced spray pressure.\u003c\/p\u003e\n\u003chr data-start=\"1697\" data-end=\"1700\"\u003e\n\u003ch3 data-start=\"1702\" data-end=\"1738\"\u003e\u003cstrong data-start=\"1706\" data-end=\"1738\"\u003eVerify Fitment (Recommended)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1740\" data-end=\"1765\"\u003eBefore ordering, confirm:\u003c\/p\u003e\n\u003cul data-start=\"1767\" data-end=\"1912\"\u003e\n\u003cli data-start=\"1767\" data-end=\"1804\"\u003e\n\u003cp data-start=\"1769\" data-end=\"1804\"\u003eOEM part number \u003cstrong data-start=\"1785\" data-end=\"1802\"\u003e4255 708 3105\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1805\" data-end=\"1851\"\u003e\n\u003cp data-start=\"1807\" data-end=\"1851\"\u003eYour unit model matches those listed below\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1852\" data-end=\"1912\"\u003e\n\u003cp data-start=\"1854\" data-end=\"1912\"\u003eApplication matches your STIHL illustrated parts diagram\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1914\" data-end=\"1992\"\u003e⚠️ Fastening components are model-specific — always verify by OEM part number.\u003c\/p\u003e\n\u003chr data-start=\"1994\" data-end=\"1997\"\u003e\n\u003ch3 data-start=\"1999\" data-end=\"2020\"\u003e\u003cstrong data-start=\"2003\" data-end=\"2020\"\u003eCompatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2022\" data-end=\"2265\"\u003e\n\u003cli data-start=\"2022\" data-end=\"2080\"\u003e\n\u003cp data-start=\"2024\" data-end=\"2080\"\u003e\u003cstrong data-start=\"2024\" data-end=\"2078\"\u003eSTIHL SG 71 (Spray Gun, Spray Lance\/Wand Assembly)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2081\" data-end=\"2139\"\u003e\n\u003cp data-start=\"2083\" data-end=\"2139\"\u003e\u003cstrong data-start=\"2083\" data-end=\"2137\"\u003eSTIHL SG 51 (Spray Gun, Spray Lance\/Wand Assembly)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2140\" data-end=\"2201\"\u003e\n\u003cp data-start=\"2142\" data-end=\"2201\"\u003e\u003cstrong data-start=\"2142\" data-end=\"2199\"\u003eSTIHL SGA 85 (Spray Gun with Pressure Gauge, Harness)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2202\" data-end=\"2265\"\u003e\n\u003cp data-start=\"2204\" data-end=\"2265\"\u003e\u003cstrong data-start=\"2204\" data-end=\"2263\"\u003eSTIHL SGA 85.0 (Spray Gun with Pressure Gauge, Harness)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2267\" data-end=\"2353\"\u003e(Exact fitment depends on production version — always verify using OEM parts diagram.)\u003c\/p\u003e\n\u003chr data-start=\"2355\" data-end=\"2358\"\u003e\n\u003ch3 data-start=\"2360\" data-end=\"2386\"\u003e\u003cstrong data-start=\"2364\" data-end=\"2386\"\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2388\" data-end=\"2619\"\u003e\n\u003cli data-start=\"2388\" data-end=\"2433\"\u003e\n\u003cp data-start=\"2390\" data-end=\"2433\"\u003eRelieve sprayer pressure before servicing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2434\" data-end=\"2470\"\u003e\n\u003cp data-start=\"2436\" data-end=\"2470\"\u003eRemove worn or damaged union nut\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2471\" data-end=\"2523\"\u003e\n\u003cp data-start=\"2473\" data-end=\"2523\"\u003eInstall new nut securely onto connection fitting\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2524\" data-end=\"2569\"\u003e\n\u003cp data-start=\"2526\" data-end=\"2569\"\u003eTighten properly to ensure leak-free seal\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2570\" data-end=\"2619\"\u003e\n\u003cp data-start=\"2572\" data-end=\"2619\"\u003eTest sprayer for pressure stability and leaks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2621\" data-end=\"2669\"\u003e⚠️ Do not overtighten to avoid damaging threads.\u003c\/p\u003e\n\u003chr data-start=\"2671\" data-end=\"2674\"\u003e\n\u003ch3 data-start=\"2676\" data-end=\"2700\"\u003e\u003cstrong data-start=\"2680\" data-end=\"2700\"\u003eMaintenance Tips\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2702\" data-end=\"2914\"\u003e\n\u003cli data-start=\"2702\" data-end=\"2741\"\u003e\n\u003cp data-start=\"2704\" data-end=\"2741\"\u003eInspect fittings regularly for wear\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2742\" data-end=\"2782\"\u003e\n\u003cp data-start=\"2744\" data-end=\"2782\"\u003eReplace worn fastening nuts promptly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2783\" data-end=\"2815\"\u003e\n\u003cp data-start=\"2785\" data-end=\"2815\"\u003eKeep connection points clean\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2816\" data-end=\"2862\"\u003e\n\u003cp data-start=\"2818\" data-end=\"2862\"\u003eStore sprayer components in dry conditions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2863\" data-end=\"2914\"\u003e\n\u003cp data-start=\"2865\" data-end=\"2914\"\u003eAlways use genuine STIHL OEM spray system parts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STIHL","offers":[{"title":"Default Title","offer_id":58959943073873,"sku":"4255 708 3105","price":1.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/2570\/0177\/files\/download_eaf6e132-5688-44b5-bb4a-140e21fcec58.jpg?v=1770912353","url":"https:\/\/www.barryspowerequipment.com\/products\/4255-708-3105","provider":"Barry's Power Equipment","version":"1.0","type":"link"}