{"product_id":"socket-head-cap-screws-alloy-steel-thermal-black-oxide-4-40-x-3-8_0406cspkc","title":"#4-40 X 3\/8\" Socket Head Cap Screws | Alloy Steel Black Oxide (1 \/ Pkg.)","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eSocket Head Cap Screws\u003c\/b\u003e crafted from high-strength alloy steel, finished in a durable thermal black oxide. Sized 4-40 thread by 3\/8\" length, these fasteners provide reliable clamping for precision assemblies, electronics enclosures, robotics, and automotive applications.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eMaterial: alloy steel for high strength and durability\u003c\/li\u003e \u003cli\u003eFinish: thermal black oxide for low glare and corrosion resistance\u003c\/li\u003e \u003cli\u003eSize: 4-40 thread with 3\/8\" length (approximately 0.375 inches)\u003c\/li\u003e \u003cli\u003eDrive: socket head for flush seating and precise torque\u003c\/li\u003e \u003cli\u003eTolerances: engineered to tight tolerances for reliable fastening in precision assemblies\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eBuilt for durability in demanding environments, the alloy steel composition offers excellent tensile strength, while the thermal black oxide finish delivers low glare and improved corrosion resistance in everyday use. The compact 4-40 size is a staple in small hardware projects, offering strong engagement in relatively thin panels and assemblies.\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePrecision equipment and instrumentation\u003c\/li\u003e \u003cli\u003eElectronics enclosures and control panels\u003c\/li\u003e \u003cli\u003eRobotics and automation assemblies\u003c\/li\u003e \u003cli\u003eSmall automotive or workshop projects\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eTips for use: Pair with matching 4-40 nuts or tapped holes and apply torque within your component's specifications. Store and handle with care to preserve the finish.\u003c\/p\u003e \u003cp\u003eUpgrade your toolkit with these high-quality alloy steel socket head cap screws—reliable, strong, and built to last.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Mutual Screw","offers":[{"title":"Default Title","offer_id":50366299275543,"sku":"0406CSPKC","price":15.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/1125\/5063\/files\/00002CSP_ff71f834-42ed-4edb-9116-bad3f7d7a1cd.jpg?v=1747423111","url":"https:\/\/mutualscrew.com\/products\/socket-head-cap-screws-alloy-steel-thermal-black-oxide-4-40-x-3-8_0406cspkc","provider":"Mutual Screw \u0026 Supply","version":"1.0","type":"link"}