{"product_id":"kyosho-1-s53005-m3x5mm-set-screw-10pcs","title":"Kyosho 1-S53005 M3x5mm Set Screw 10pcs","description":"\u003cp\u003eA pack of ten M3 x 5mm set screws, from Kyosho's universal hardware range.\u003c\/p\u003e\u003cp\u003eA set screw, also called a grub screw, is headless. The entire body threads into the part so nothing protrudes above the surface, which is what makes it the right fastener for locking a component onto a rotating shaft: a pinion gear onto a motor shaft, a collar onto an axle, a clutch bell onto its pilot. A protruding head on a spinning part would catch on everything nearby.\u003c\/p\u003e\u003cp\u003eThey work by pressing their tip directly against the shaft. That means installation matters more than with a normal screw. Most shafts have a machined flat for the tip to seat against, and a set screw tightened onto the round part of a shaft will either work loose or dig in and damage it. Thread lock is standard practice, because vibration backs them out readily.\u003c\/p\u003e\u003cp\u003eThey are also easy to lose, being small and headless, and a pinion that has shed its grub screw usually strips the spur gear before you notice.\u003c\/p\u003e\u003cp\u003eAt 5mm this is the most commonly used length. This supersedes the older Kyosho number 1161.\u003c\/p\u003e","brand":"PowerHobby","offers":[{"title":"Default Title","offer_id":44532864221272,"sku":"KYO1-S53005","price":2.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0567\/0554\/8376\/files\/1-s53005_069845ac-9814-43a7-9553-8d3e2c485548.jpg?v=1786243011","url":"https:\/\/beavertonmilestonehobby.com\/products\/kyosho-1-s53005-m3x5mm-set-screw-10pcs","provider":"Beaverton Milestone Hobby","version":"1.0","type":"link"}