{"product_id":"liftmaster-q003","title":"LiftMaster Q003 \/ K07-50637 Slide-Gate Chain Adjustment Bolt","description":"\u003cp\u003e\u003cstrong\u003eThe LiftMaster Q003 is a replacement chain bolt for compatible chain-driven sliding-gate installations. The supplier identifies manufacturer part number K07-50637 for this item, and LiftMaster documentation lists that reference as a chain bolt. It is a mechanical service component used in the appropriate chain attachment and adjustment arrangement. Confirm the exact operator and mounting hardware before ordering; this is not a complete drive-chain package, master link or universal bolt for every gate.\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003eCompatibility — Models, Versions and Exclusions\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel or selection point\u003c\/th\u003e\n\u003cth\u003eCompatibility requirement\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSL3000U\u003c\/td\u003e\n\u003ctd\u003eManufacturer parts list identifies K07-50637 as the chain bolt.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther LiftMaster slide operators\u003c\/td\u003e\n\u003ctd\u003eUse the model’s own parts documentation; shared chain size does not prove bolt fit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChain and connecting links\u003c\/td\u003e\n\u003ctd\u003eSeparate components; select the correct chain family and manufacturer requirements.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwing-gate actuator hardware\u003c\/td\u003e\n\u003ctd\u003eA different mechanical arrangement; no substitution is established.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eIdentify the Chain Attachment, Not Just the Chain Size\u003c\/h2\u003e\u003cp\u003eThe bolt, mounting bracket and chain connection work as an assembly. Photograph the complete attachment point as well as the operator label before ordering. A familiar chain size does not establish the bolt’s thread, available adjustment or bracket fit. When the original hardware is damaged or missing, the equipment diagram is more reliable than choosing a visually similar general-purpose fastener.\u003c\/p\u003e\u003cp\u003eUneven movement can result from a worn chain, poor alignment, damaged mounting support or other drive components. A replacement adjustment bolt should not be used to compensate for an unsuitable chain path or a binding gate. Have the technician evaluate the entire attachment and drive arrangement, then set the chain as directed by the operator instructions rather than simply making it as tight as possible.\u003c\/p\u003e\u003ch2\u003eSpecifications and Product Identification\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupplier SKU\u003c\/td\u003e\n\u003ctd\u003eQ003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer part number\u003c\/td\u003e\n\u003ctd\u003eK07-50637\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComponent\u003c\/td\u003e\n\u003ctd\u003eSlide-gate chain bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDocumented example\u003c\/td\u003e\n\u003ctd\u003eSL3000U repair-parts list\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelection basis\u003c\/td\u003e\n\u003ctd\u003eExact parts diagram and installed chain attachment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eConfirm required thread, length and mounting details before substituting by measurement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch Q003 or K07-50637 to the exact operator parts list.\u003c\/li\u003e\n\u003cli\u003eInspect the chain bracket, connection and available adjustment space.\u003c\/li\u003e\n\u003cli\u003eIdentify the installed chain size before ordering chain or links separately.\u003c\/li\u003e\n\u003cli\u003eCheck for worn threads, distorted supports and damage elsewhere in the drive.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Contents and Separate Requirements\u003c\/h2\u003e\u003cp\u003eThis SKU identifies the chain-bolt service item. The SL3000U parts list separately identifies a hardware kit containing a chain bolt and chain bracket; do not assume that larger kit is included with this individual item. Confirm nuts, washers and any required bracket against the current supplier inventory before purchase.\u003c\/p\u003e\u003ch2 class=\"safety-warning\"\u003eSafety Warnings — Read Before Installation or Service\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWARNING: Gate movement and exposed chain-drive components can cause crushing, pinching or entanglement injuries. Have a qualified gate technician perform the repair.\u003c\/li\u003e\n\u003cli\u003eDisconnect operator and backup power where fitted, and secure the gate against movement before loosening chain hardware.\u003c\/li\u003e\n\u003cli\u003eDo not reach into an energized chain path or attempt adjustment while another person operates the gate.\u003c\/li\u003e\n\u003cli\u003eRestore correct alignment and guarding, then perform the required operating and safety-device checks before normal service.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated Products and Important Differences\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/roller-chain-10-41-chain\"\u003e#41 roller chain, 10-foot length\u003c\/a\u003e — a separate drive-chain option only where #41 chain is specified; verify the required length and grade.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/master-link-41-chain\"\u003e#41 roller-chain master link\u003c\/a\u003e — a separate connecting link for the matching chain family, not a replacement for Q003.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eDoes Q003 include a new drive chain?\u003c\/h3\u003e\u003cp\u003eNo complete chain package is represented. Select any replacement chain and links separately.\u003c\/p\u003e\u003ch3\u003eCan I use it with any #41-chain gate?\u003c\/h3\u003e\u003cp\u003eChain size alone is insufficient. The bolt and bracket arrangement must match the operator documentation.\u003c\/p\u003e\u003ch3\u003eIs it the same as a master link?\u003c\/h3\u003e\u003cp\u003eNo. A master link joins a roller-chain loop; this listing identifies the chain adjustment\/attachment bolt.\u003c\/p\u003e\u003ch3\u003eShould the chain be pulled completely tight?\u003c\/h3\u003e\u003cp\u003eUse the equipment manufacturer’s specified adjustment. Over-tightening is not a substitute for correcting wear or misalignment.\u003c\/p\u003e\u003ch2\u003eNeed Help Confirming the Right Product?\u003c\/h2\u003e\u003cp\u003e\u003ca href=\"https:\/\/garage-doorparts.com\/pages\/contact\"\u003eContact Garage-DoorParts.com before ordering\u003c\/a\u003e. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.\u003c\/p\u003e","brand":"LiftMaster","offers":[{"title":"Default Title","offer_id":60655766110494,"sku":"Q003","price":11.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/2781\/5710\/files\/q003.jpg?v=1793139858","url":"https:\/\/garage-doorparts.com\/products\/liftmaster-q003","provider":"garage-doorparts.com","version":"1.0","type":"link"}