--- product_id: 1241315 title: "Stainless Steel Socket Cap Screw, Plain Finish, Internal Hex Drive, 20mm Length, Fully Threaded, M3-0.5 Metric Coarse Threads (Pack of 100)" brand: "small parts" price: "Β£24.48" currency: GBP in_stock: true reviews_count: 8 category: "Small Parts" url: https://www.desertcart.co.uk/products/1241315-stainless-steel-socket-cap-screw-plain-finish-internal-hex-drive store_origin: GB region: United Kingdom --- # Stainless Steel corrosion resistant M3-0.5 Metric Coarse Threads Internal Hex Drive for high torque Stainless Steel Socket Cap Screw, Plain Finish, Internal Hex Drive, 20mm Length, Fully Threaded, M3-0.5 Metric Coarse Threads (Pack of 100) **Brand:** small parts **Price:** Β£24.48 **Availability:** βœ… In Stock ## Summary > πŸ”§ Screw it right, screw it tight β€” the pro’s choice for lasting performance! ## Quick Answers - **What is this?** Stainless Steel Socket Cap Screw, Plain Finish, Internal Hex Drive, 20mm Length, Fully Threaded, M3-0.5 Metric Coarse Threads (Pack of 100) by small parts - **How much does it cost?** Β£24.48 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/1241315-stainless-steel-socket-cap-screw-plain-finish-internal-hex-drive) ## Best For - small parts enthusiasts ## Why This Product - Trusted small parts brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Bulk Pack Value:** 100-pack offering cost-effective solutions for professional projects and maintenance. - β€’ **Hex Drive Power:** Internal hex socket design delivers superior torque control and reduces cam-out. - β€’ **Premium Stainless Steel:** Corrosion-resistant 18/8 stainless steel guarantees long-lasting strength and reliability. - β€’ **Industrial-Grade Reliability:** Fully threaded 20mm length screws built to withstand high-stress applications. - β€’ **Precision Engineered Threads:** Coarse metric threading ensures durability and easy installation in brittle materials. ## Overview This pack of 100 M3-0.5 stainless steel socket cap screws features fully threaded, 20mm length fasteners with a corrosion-resistant plain finish and internal hex drive. Designed for industrial and professional use, these screws combine durable coarse metric threads with high torque hex socket heads, ensuring reliable fastening in a variety of applications. ## Description Socket Cap Screws, also known as Allen head screws, are reliable and durable and are used in many applications. They are available in a variety of head styles and materials.Stainless steels are used for their corrosion resistance, high-temperature strength, scaling resistance, and low-temperature toughness. These properties account for their extremely wide use in practically every industry. Austenitic Stainless Steels are alloys of iron and carbon that contain between 16% and 30% Chromium, a maximum of 0.15% carbon, along with Nickel (or Manganese), and other alloying elements. The chromium, which helps develop a passive surface oxide film, provides corrosion resistance in stainless steels. Austenitic Stainless Steels are designated by a 3 digit SAE Stainless Steel Grade beginning with the number 3 (e.g. 304, 316). Another common naming convention for Austenitic Stainless Steels are 18/8, 18/10, 18/0, etc. where the 18 refers to the % of Chromium and 8 to the % of Nickel contained in the material.With a high cylindrical head, socket cap head fasteners have a recessed driving area and offer high hold power at high torque levels. Hex socket drive systems are driven by hex wrenches or power tools with hexagonal bits.A threaded fastener's size name includes information about the major external diameter (in millimeters), followed by the thread pitch (millimeters per thread), which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings. Review: Great Screws! - Good quality parts. No garbage threads, no poorly machined head etc. Quality product for a fair price. Steel appears to be a high quality stainless. Review: Good Quality, well made and very reasonably priced. - Good Quality, well made and very reasonably priced. Have no issue with its use or performance. ## Features - Socket Cap Screws are durable and reliable - Stainless Steel is suitable where formability and cost are important considerations - Socket cap head fasteners are very common in industrial applications - Drive system is a hexagon-shaped hole ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000FN21AO | | Best Sellers Rank | #839,687 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4,982 in Socket Head Screws | | Brand | Small Parts | | Color | Silver | | Customer Reviews | 4.5 out of 5 stars 13 Reviews | | Drive System | External Hex | | Exterior Finish | Plain | | Fastener Type | Machine Screw | | Global Trade Identification Number | 00082893669779 | | Head Style | Hex | | Head Type | Socket | | Item Dimensions | 20 inches | | Item Weight | 5.6 ounces | | Item dimensions L x W x H | 20 inches | | Manufacturer | Small Parts | | Material | Stainless Steel | | Material Type | Stainless Steel | | Metal Type | Stainless Steel | | Model | 538016 | | Number Of Items | 100 | | Part Number | B000FN21AO | | Point Style | Round Point | | Screw Head Style | Hex | | Screw Point Style | Round Point | | Set Screw Thread Type | Coarse | | Size Name | M3-0.5 | | Thread Class | 6G | | Thread Coverage | Partially Threaded | | Thread Size | m3-0.5 | | Thread Style | Right Hand | | Thread Type | Metric Coarse | | UPC | 082893669779 | | Unit Count | 100 Count | ## Product Details - **Exterior Finish:** Plain - **Head Style:** Hex - **Item dimensions L x W x H:** 20 inches - **Material:** Stainless Steel - **Thread Size:** m3-0.5 ## Images ![Stainless Steel Socket Cap Screw, Plain Finish, Internal Hex Drive, 20mm Length, Fully Threaded, M3-0.5 Metric Coarse Threads (Pack of 100) - Image 1](https://m.media-amazon.com/images/I/71rN2qlxRwL.jpg) ![Stainless Steel Socket Cap Screw, Plain Finish, Internal Hex Drive, 20mm Length, Fully Threaded, M3-0.5 Metric Coarse Threads (Pack of 100) - Image 2](https://m.media-amazon.com/images/I/71I0s0nNYuL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great Screws! *by J***L on November 16, 2013* Good quality parts. No garbage threads, no poorly machined head etc. Quality product for a fair price. Steel appears to be a high quality stainless. ### ⭐⭐⭐⭐ Good Quality, well made and very reasonably priced. *by C***E on July 28, 2014* Good Quality, well made and very reasonably priced. Have no issue with its use or performance. ### ⭐⭐⭐ Not a full count of 100 (87/100) *by C***Y on February 13, 2015* Screws are ok, but the count was off. Received the package, bolts were in box that was taped closed. Did a count of the bolts, only 87 of the expected 100. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/1241315-stainless-steel-socket-cap-screw-plain-finish-internal-hex-drive](https://www.desertcart.co.uk/products/1241315-stainless-steel-socket-cap-screw-plain-finish-internal-hex-drive) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-09-18*