{"product_id":"40-roller-chain-connector-link-full-link-08b-08a","title":"10Pcs #40 Roller Chain Connector Link Full Link 08B\/08A For #40 Roller Chain","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e#40 Roller Chain Connector Links — Reliable Full Link for Secure Chain Repair\u003c\/h2\u003e\n\u003cp\u003eWhen a worn or broken #40 roller chain brings your equipment to a halt, having the right connector link on hand is the difference between minutes of downtime and hours of lost productivity. These full link connector links are designed for DIYers, mechanics, and maintenance professionals who need a dependable, drop-in solution for #40 (08B \/ 08A) roller chain repair and assembly.\u003c\/p\u003e\n\u003cp\u003eEach pack contains 10 full connector links machined to fit standard #40 roller chain. Available in two shaft diameter options — 08B with a shaft diameter of 4.45mm (~0.175 in) and 08A with a shaft diameter of 3.96mm (~0.156 in) — to match your specific chain specification. The full link design includes the outer plate, inner plate, roller pin, and spring clip for a complete, ready-to-install connection.\u003c\/p\u003e\n\u003cp\u003eTypical applications include bicycle chain repair, go-kart drive chains, conveyor systems, agricultural machinery, and general-purpose power transmission setups where #40 ANSI \/ 08B ISO roller chain is used. Whether you're replacing a master link on a garden tractor or assembling a custom chain drive, these connector links deliver consistent fit and holding strength across a range of use cases.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard #40 ANSI \/ 08B ISO roller chain. Select \u003cstrong\u003e08B\u003c\/strong\u003e for 4.45mm shaft diameter or \u003cstrong\u003e08A\u003c\/strong\u003e for 3.96mm shaft diameter. Verify your chain pitch (12.7mm \/ 0.5 in) before ordering.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These #40 Roller Chain Connector Links\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eFull Link Design\u003c\/strong\u003e — Includes outer plate, inner plate, roller pins, and spring clip for a complete, self-contained connection without additional hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eTwo Shaft Diameter Options\u003c\/strong\u003e — Choose 08B (4.45mm \/ 0.175 in) or 08A (3.96mm \/ 0.156 in) to match your exact chain specification and avoid misfit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003eStandard #40 \/ 08B ISO Pitch\u003c\/strong\u003e — Engineered to the 12.7mm (0.5 in) pitch standard, ensuring accurate engagement with sprocket teeth and smooth power transmission.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eCorrosion-Resistant Finish\u003c\/strong\u003e — Surface treatment helps resist rust and oxidation in typical workshop, outdoor, and light-industrial environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003e10-Piece Pack\u003c\/strong\u003e — Stocking 10 links per pack means you have spares ready for future repairs, reducing downtime on recurring maintenance tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cstrong\u003eTool-Free Spring Clip Installation\u003c\/strong\u003e — The spring clip retainer can be seated with basic hand tools or pliers, making field repairs straightforward without specialized equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — #40 Roller Chain Connector Link\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Standard\u003c\/th\u003e\n\u003ctd\u003e#40 ANSI \/ 08B ISO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eChain Pitch\u003c\/th\u003e\n\u003ctd\u003e12.7mm (0.5 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShaft Diameter (08B)\u003c\/th\u003e\n\u003ctd\u003e4.45mm (0.175 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShaft Diameter (08A)\u003c\/th\u003e\n\u003ctd\u003e3.96mm (0.156 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLink Type\u003c\/th\u003e\n\u003ctd\u003eFull Link (Master Link)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRetaining Clip Type\u003c\/th\u003e\n\u003ctd\u003eSpring Clip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e10 Pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Chain Type\u003c\/th\u003e\n\u003ctd\u003eSingle-strand #40 roller chain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I know whether to choose 08B or 08A?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe key difference is the shaft (pin) diameter. If your existing chain uses a 4.45mm pin diameter, select \u003cstrong\u003e08B\u003c\/strong\u003e. If it uses a 3.96mm pin diameter, select \u003cstrong\u003e08A\u003c\/strong\u003e. You can measure the pin with a digital caliper or check your chain's original specification sheet. Both types share the same 12.7mm pitch, so pitch alone is not sufficient to distinguish them.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this connector link work with my bicycle chain?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese links are designed for standard single-speed or industrial #40 \/ 08B roller chains with a 12.7mm pitch. Most modern multi-speed bicycle chains use narrower, proprietary standards and are not compatible. If you are working on a single-speed bicycle, cargo bike, or e-bike with a #40-spec chain, verify the pin diameter matches before ordering.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is the spring clip connection?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe spring clip (also called a cotter pin or snap link) is the standard retaining method for #40 roller chain master links. When correctly seated — with the closed end of the clip facing the direction of chain travel — it provides holding strength consistent with the rated load of the chain. For high-shock or high-speed applications, inspect the clip regularly and replace if any deformation is observed.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these links corrosion-resistant for outdoor use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe links feature a surface treatment that provides resistance to light moisture and oxidation, suitable for typical outdoor and workshop environments. For continuous exposure to rain, salt spray, or chemical environments, we recommend applying a chain lubricant after installation and inspecting periodically. For heavily corrosive environments, consider stainless steel chain hardware.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this link on a go-kart or mini bike drive chain?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. #40 roller chain is a common standard for go-karts, mini bikes, and small engine power transmission. Confirm your drive chain pitch is 12.7mm and select the correct shaft diameter (08B at 4.45mm or 08A at 3.96mm). Always verify the connector link is fully seated and the spring clip is locked before operating the vehicle.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I install the connector link without special tools?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThread the link pins through the chain ends, slide the outer plate onto the pins, then press the spring clip into the groove on each pin using needle-nose pliers. Ensure the closed (rounded) end of the spring clip points in the direction of chain travel — this prevents the clip from being pushed off during operation. No chain breaker tool is required for installation.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many connector links do I get per order?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEach order includes \u003cstrong\u003e10 full connector links\u003c\/strong\u003e. Each link consists of the outer plate, inner plate, two roller pins, and a spring clip — everything needed for one complete chain connection. Having extras on hand is useful for scheduled maintenance or unexpected field repairs.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your \u003cstrong\u003eType (08B or 08A)\u003c\/strong\u003e above, then add to cart.\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I know whether to choose 08B or 08A?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The key difference is the shaft (pin) diameter. If your existing chain uses a 4.45mm pin diameter, select 08B. If it uses a 3.96mm pin diameter, select 08A. Both types share the same 12.7mm pitch.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this connector link work with my bicycle chain?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These links are designed for standard single-speed or industrial #40 \/ 08B roller chains with a 12.7mm pitch. Most modern multi-speed bicycle chains use narrower, proprietary standards and are not compatible.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong is the spring clip connection?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"When correctly seated with the closed end of the clip facing the direction of chain travel, it provides holding strength consistent with the rated load of the chain. Inspect the clip regularly in high-shock or high-speed applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these links corrosion-resistant for outdoor use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The links feature a surface treatment suitable for typical outdoor and workshop environments. Apply chain lubricant after installation and inspect periodically for heavily corrosive environments.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use this link on a go-kart or mini bike drive chain?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. #40 roller chain is a common standard for go-karts and mini bikes. Confirm your drive chain pitch is 12.7mm and select the correct shaft diameter before use.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I install the connector link without special tools?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Thread the link pins through the chain ends, slide the outer plate onto the pins, then press the spring clip into the groove using needle-nose pliers. Ensure the closed end of the spring clip points in the direction of chain travel.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How many connector links do I get per order?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Each order includes 10 full connector links. Each link consists of the outer plate, inner plate, two roller pins, and a spring clip — everything needed for one complete chain connection.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"08B , Shaft Dia:4.45mm \/ 10Pcs","offer_id":52423171768594,"sku":"GF2759-0","price":7.26,"currency_code":"USD","in_stock":true},{"title":"08A , Shaft Dia:3.96mm \/ 10Pcs","offer_id":52423171801362,"sku":"GF2759-1","price":7.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture4of7_6d170e77-da96-4348-8515-47e0bacb2bba.jpg?v=1782572278","url":"https:\/\/homediyer.com\/products\/40-roller-chain-connector-link-full-link-08b-08a","provider":"HomeDIYer","version":"1.0","type":"link"}