--- title: "Black Oxide Hex Socket Full Thread with Spring and Flat Washer Sem Screws" description: "Black Oxide Hex Socket Full Thread with Spring and Flat Washer Sem Screws — Socket Head Cap & Allen Screws. MOQ 10,000 pieces, US$0.14 – 0.29." url: https://engineeringhardware.com/product/black-oxide-hex-socket-full-thread-with-spring-and-flat-washer-sem-screws/ source: Engineering Hardware & Fasteners --- # Black Oxide Hex Socket Full Thread with Spring and Flat Washer Sem Screws [![Black Oxide Hex Socket Full Thread with Spring and Flat Washer Sem Screws](https://img.engineeringhardware.com/Black-Oxide-Hex-Socket-Full-Thread-with-Spring-and-Flat-Washer-Sem-Screws.webp)](https://img.engineeringhardware.com/Black-Oxide-Hex-Socket-Full-Thread-with-Spring-and-Flat-Washer-Sem-Screws.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Screws › Socket Head Cap & Allen Screws](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/black-oxide-hex-socket-full-thread-with-spring-and-flat-washer-sem-screws.md) Model no. **8*40** US$0.14 – 0.29 / piece MOQ 10,000 pieces · Final price confirmed in your quote - **Material:** Carbon Steel - **Head Style:** Round - **Standard:** DIN, GB, ANSI, BSW, JIS - **Grade:** 8.8 - **Head Type:** Phillips /Slotted /Hex /Round /Torx - **Surface Treatment:** Plain /Galvanized /Passivation /Dacromet - **Finish:** Baking Paint /Nylok Precote /Electrophoresis Black - **Package Size:** 23.00cm * 19.00cm * 23.00cm Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Black%20Oxide%20Hex%20Socket%20Full%20Thread%20with%20Spring%20and%20Flat%20Washer%20Sem%20Screws%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fblack-oxide-hex-socket-full-thread-with-spring-and-flat-washer-sem-screws%2F) Specifications are as listed for this product. Engineering Hardware & Fasteners confirms ratings, mating parts, compatibility, packing and lead time with you before you order. ## Specifications | Customization | Available | | --- | --- | | Material | Carbon Steel | | Type | Fillister/Cup Head | | Model NO. | 8*40 | | Groove | Hexagon Socket | | Connection | Common Bolt | | Head Style | Round | | Standard | DIN, GB, ANSI, BSW, JIS | | Grade | 8.8 | | Shipping Cost | to Be Negotiated | | Samples | to Be Negotiated | | Delivery Time | 20-30 Days | | Head Type | Phillips /Slotted /Hex /Round /Torx | | Certification | ISO9001, SGS | | Surface Treatment | Plain /Galvanized /Passivation /Dacromet | | Finish | Baking Paint /Nylok Precote /Electrophoresis Black | | Class/Gread | 3.6,4.8,5.6,6.8,8.8,9.8,10.9,12.9 | | Transport Package | Plastic Bag/Boxs /Cartons/Pallets/Customize | | Specification | M8*40 | | Origin | China | | Production Capacity | 50000000 PCS/Year | | Package Size | 23.00cm * 19.00cm * 23.00cm | | Package Gross Weight | 25.000kg | | Category | [Socket Head Cap & Allen Screws](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) | ## Technical parameters | Item | Black Oxide Hex Socket Full Thread with spring and flat washer SEM Screws | | --- | --- | | Head Type | Fillister/Cup Head | | Drive Style | Hexagon socket | | Material | Carbon Steel | | Finish | Black Zinc-Plated | | Available Raw Material | Carbon steel | | Alloy steel | | | Stainless steel | | | Brass, Bronze, Aluminum | | | Standard | DIN,ANSI,ASTM,JIS,GB,ISO,NON-STANDARD | | Grade | 3.6/4.8/5.6 /6.8/8.8/9.8/10.9/12.9 | | Surface finishing | PlainGalvanized (various of color) ,Zinc-Plated (various of color)Nickel- Plated, Chrome-Plated, Oxide BlackPassivation, Dacromet, Nylok Precote,Baking Paint/Stoving Varnish,Electrophoresis Black | | Heat Treatment | Carburization or tempering or high-frequency quenching | | Packing | Plastic Bag/Boxes /Cartons/Pallets/Customize, or customer request | ## Description Black Oxide Hex Socket Full Thread with Spring and Flat Washer Sem Screws is part of our socket head cap & allen screws range (Screws). ### Key details - **Type:** Fillister/Cup Head - **Standard:** DIN, GB, ANSI, BSW, JIS - **Material:** Carbon Steel - **Grade:** 8.8 - **Head Type:** Phillips /Slotted /Hex /Round /Torx - **Head Style:** Round - **Groove:** Hexagon Socket - **Surface Treatment:** Plain /Galvanized /Passivation /Dacromet Available configurations include material, head style, standard, grade and head type. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 10,000 pieces at US$0.14 – 0.29 per piece. Send one inquiry with the part number, quantity and destination, and Engineering Hardware & Fasteners confirms size, thread, material, grade, finish, price, lead time and shipping, checks the goods before dispatch and ships them to you. ## Frequently asked questions ### What is the minimum order quantity (MOQ) for Black Oxide Hex Socket Full Thread with Spring and Flat Washer Sem Screws? The listed minimum order is 10,000 pieces, at US$0.14 – 0.29 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size. ### What are the main specifications of Black Oxide Hex Socket Full Thread with Spring and Flat Washer Sem Screws? Type: Fillister/Cup Head; Standard: DIN, GB, ANSI, BSW, JIS; Material: Carbon Steel; Grade: 8.8; Head Type: Phillips /Slotted /Hex /Round /Torx; Head Style: Round. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include material, head style, standard, grade and head type. Size, thread, length, material and grade, surface finish, head marking, packaging and labels can be quoted to your specification or drawing. ### What is the lead time and how is it shipped? Lead time depends on quantity and customization and is confirmed in your quote. Engineering Hardware & Fasteners checks the goods before dispatch and ships by express, air or sea; mixed orders can be consolidated in one shipment. ### Which other socket head cap & allen screws are available? The Socket Head Cap & Allen Screws category lists 2,042 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) How we work ## Specified, checked and shipped by Engineering Hardware & Fasteners Engineering Hardware & Fasteners supplies bolts, screws, nuts, washers, anchors, rivets and fastening hardware to equipment makers, contractors, distributors and maintenance teams. Orders go through one controlled process: size, thread, material, grade and finish confirmed, samples approved, dimensions, thread fit and plating checked before packing, then packed for export — standard or made to drawing. - DIN, ISO, ASTM, ANSI, JIS and GB standard parts - Non-standard parts made to your drawing - Dimensions, thread gauges and plating checked before packing - Export cartons and pallets, consolidated mixed orders - Samples available for approval before mass production [![Production floor](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor-1024x683.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor.webp) Production floor [![Inspection bench](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench.webp) Inspection bench [![Sorting & packing](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-03-sorting-and-packing-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-03-sorting-and-packing.webp) Sorting & packing [![Parts warehouse](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-04-parts-warehouse-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-04-parts-warehouse.webp) Parts warehouse [![Sample review](https://engineeringhardware.com/wp-content/uploads/2026/11/office-02-office-sample-review-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/office-02-office-sample-review.webp) Sample review [![Sales office](https://engineeringhardware.com/wp-content/uploads/2026/11/office-01-daily-sales-office-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/office-01-daily-sales-office.webp) Sales office [More about us →](https://engineeringhardware.com/about/) · [Request a sample or custom quote →](https://engineeringhardware.com/contact/) ## Request a quote for this product ## Related products [All Socket Head Cap & Allen Screws →](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) [![ISO7380 Hex Socket Pan Head Machine Screw Full Thread Black Oxide](https://img.engineeringhardware.com/ISO7380-Hex-Socket-Pan-Head-Machine-Screw-Full-Thread-Black-Oxide.webp)](https://engineeringhardware.com/product/iso7380-hex-socket-pan-head-machine-screw-full-thread-black-oxide/) Socket Head Cap & Allen Screws ### [ISO7380 Hex Socket Pan Head Machine Screw Full Thread Black Oxide](https://engineeringhardware.com/product/iso7380-hex-socket-pan-head-machine-screw-full-thread-black-oxide/) Hexagon Socket · ISO **US$0.012**MOQ 1,000 pieces [![Hex Socket Cap Head Combination Screws, Assembly 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