{"product_id":"cap-screws-flat-socket-nylon-patch-alloy-thermal-black-oxide-4-40-x-3-8","title":"#4-40 X 3\/8\" Flat Head Cap Screws | Nylon Patch | Alloy Steel Thermal Black Oxide (100 \/ Pkg.)","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eCap Screws Flat Socket Nylon Patch Alloy Thermal Black Oxide 4-40 x 3\/8\u003c\/b\u003e are precision-engineered flat socket cap screws designed for secure, high-precision fastening in a variety of assemblies. Featuring a nylon patch backing, alloy construction, and a thermal black oxide finish, these screws offer reliable performance in demanding environments.\u003c\/p\u003e \u003cp\u003eKey benefits include enhanced load distribution, reduced vibration, and protection of mating surfaces thanks to the nylon patch. The 4-40 thread size and 3\/8 inch length make these screws ideal for electronics, automotive, and industrial applications where a compact, corrosion-resistant fastener is required.\u003c\/p\u003e \u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003eThread size:\u003c\/b\u003e 4-40\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eLength:\u003c\/b\u003e 3\/8 in\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eHead style:\u003c\/b\u003e Flat Socket Cap\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMaterial:\u003c\/b\u003e Alloy with Nylon Patch backing\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eFinish:\u003c\/b\u003e Thermal Black Oxide\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eApplications:\u003c\/b\u003e Electronics, machinery, enclosures, and more\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy choose these cap screws?\u003c\/h3\u003e\n\u003cp\u003eThey combine strength, durability, and a non-marring backing for sensitive surfaces. The thermal black oxide finish provides corrosion resistance and a low-reflectivity appearance, making them suitable for both functional and aesthetic demands in professional assemblies.\u003c\/p\u003e \u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eThread type: 4-40\u003c\/li\u003e \u003cli\u003eLength: 3\/8 in\u003c\/li\u003e \u003cli\u003eHead: Flat Socket Cap\u003c\/li\u003e \u003cli\u003eMaterial: Alloy\u003c\/li\u003e \u003cli\u003eFinish: Thermal Black Oxide\u003c\/li\u003e \u003cli\u003eBacking: Nylon Patch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Mutual Screw","offers":[{"title":"Default Title","offer_id":50350876197143,"sku":"0406CSFPBB","price":25.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/1125\/5063\/files\/0606CSF188BYW_8362f523-d8fe-44c5-840b-07f25bcc4120.jpg?v=1747423185","url":"https:\/\/mutualscrew.com\/products\/cap-screws-flat-socket-nylon-patch-alloy-thermal-black-oxide-4-40-x-3-8","provider":"Mutual Screw \u0026 Supply","version":"1.0","type":"link"}