--- title: "High Strength Black Oxide Hex Socket Head Cap Bolt" description: "High Strength Black Oxide Hex Socket Head Cap Bolt — Structural & Heavy Hex Bolts. MOQ 1,000 pieces, US$0.96 – 1.20." url: https://engineeringhardware.com/product/high-strength-black-oxide-hex-socket-head-cap-bolt/ source: Engineering Hardware & Fasteners --- # High Strength Black Oxide Hex Socket Head Cap Bolt [![High Strength Black Oxide Hex Socket Head Cap Bolt](https://img.engineeringhardware.com/High-Strength-Black-Oxide-Hex-Socket-Head-Cap-Bolt.webp)](https://img.engineeringhardware.com/High-Strength-Black-Oxide-Hex-Socket-Head-Cap-Bolt.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Bolts › Structural & Heavy Hex Bolts](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/high-strength-black-oxide-hex-socket-head-cap-bolt.md) Model no. **Hex Socket Head Bolt** | **US$1.20**1,000–4,999 pieces | **US$0.96**5,000+ pieces | | --- | --- | MOQ 1,000 pieces · Final price confirmed in your quote - **Head Style:** Round - **Standard:** Customized - **Grade:** Gr 8.8 10.9 12.9 - **Finish:** Black - **Thread Type:** External Thread - **Precision Grade:** Industrial Grade - **Package Size:** 15.00cm * 15.00cm * 10.00cm - **Material:** High Strength Steel Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20High%20Strength%20Black%20Oxide%20Hex%20Socket%20Head%20Cap%20Bolt%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fhigh-strength-black-oxide-hex-socket-head-cap-bolt%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 | Model NO. | Hex Socket Head Bolt | | --- | --- | | Connection | Common Bolt | | Head Style | Round | | Standard | Customized | | Grade | Gr 8.8 10.9 12.9 | | Application | Machinery, Chemical Industry, Environmental, Building | | Finish | Black | | Thread Type | External Thread | | Anticorrosive Performance | Salt Spray Test Reach 1000-2000 Hours. | | Precision Grade | Industrial Grade | | Certificate | ISO9001:2008 | | Transport Package | Carton, Pallet | | Specification | M5x10mm-M100x3000mm, 1/4X1"-4"X100" | | Origin | China | | HS Code | 7318151001 | | Production Capacity | 100ton/Month | | Package Size | 15.00cm * 15.00cm * 10.00cm | | Package Gross Weight | 3.000kg | | Customization | Available | | Material | High Strength Steel | | Type | Round Head | | Shipping Cost | Contact the supplier about freight and estimated delivery time. | | Gonuo Hardware | Your Partner for DIN, ASTM & Custom Solutions | | Stainless Steel Fasteners (A2/A4-80) | Superior corrosion resistance for marine, chemical, and food-grade environments. | | High-Strength Bolts (Property Class 10.9/12.9, ASTM A325/A490) | Engineered for critical structural connections and extreme load-bearing applications. | | High-Precision Components | Manufactured to tolerances as tight as ±0.01mm for advanced robotics, automotive, and aerospace assemblies. | | Direct Factory Access with Engineering Support | Eliminate middleman costs and gain direct access to our engineering team for design optimization and material selection. | | Build-to-Print Excellence | We seamlessly transition your custom designs from prototype to reliable, high-volume production. | | Certified & Consistent Quality | Our ISO 9001-certified processes ensure every batch meets the same high standard, shipment after shipment. | | Category | [Structural & Heavy Hex Bolts](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) | ## Technical parameters | Type | High-Precision Bolt | | --- | --- | | Material | Carbon Steel/ Starinless Steel/ Brass/Alu | | Standard | Standard & Customized | | Size | M5x10mm-M100x3000mm1/4X1" ---- 4"X100" | | Grade | Gr4.6 4.8 6.8 8.8 10.9 12.9 & A2-70,A4-70,A2-80,A4-80 | ## Description High Strength Black Oxide Hex Socket Head Cap Bolt is part of our structural & heavy hex bolts range (Bolts). ### Key details - **Type:** Round Head - **Standard:** Customized - **Material:** High Strength Steel - **Grade:** Gr 8.8 10.9 12.9 - **Head Style:** Round - **Finish:** Black - **Connection:** Common Bolt - **Application:** Machinery, Chemical Industry, Environmental, Building Available configurations include head style, standard, grade, finish and thread type. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 1,000 pieces at US$0.96 – 1.20 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 High Strength Black Oxide Hex Socket Head Cap Bolt? The listed minimum order is 1,000 pieces, at US$0.96 – 1.20 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size. ### How does the price change with quantity? Volume pricing: US$1.20 for 1,000–4,999 pieces; US$0.96 for 5,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote. ### What are the main specifications of High Strength Black Oxide Hex Socket Head Cap Bolt? Type: Round Head; Standard: Customized; Material: High Strength Steel; Grade: Gr 8.8 10.9 12.9; Head Style: Round; Finish: Black. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include head style, standard, grade, finish and thread 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 structural & heavy hex bolts are available? The Structural & Heavy Hex Bolts category lists 2,565 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) 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 Structural & Heavy Hex Bolts →](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) [![High Strength Mono-Bolt Rivet Pop All Stainless Steel Metal Blind Rivets](https://img.engineeringhardware.com/High-Strength-Mono-Bolt-Rivet-Pop-All-Stainless-Steel-Metal-Blind-Rivets.webp)](https://engineeringhardware.com/product/high-strength-mono-bolt-rivet-pop-all-stainless-steel-metal-blind-rivets/) Structural & Heavy Hex Bolts ### [High Strength Mono-Bolt Rivet Pop All Stainless Steel Metal Blind Rivets](https://engineeringhardware.com/product/high-strength-mono-bolt-rivet-pop-all-stainless-steel-metal-blind-rivets/) Stainless Steel · Dome Head **US$0.14 – 0.19**MOQ 1,000 pieces [![Big Stock Grade 10.9 M20X50 Heavy Hex Flange Bolt for 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[![Customized Torshear Type High Strength Hexagon Nuts and Plain Washer Dome Tc Bolt for Steel Structures](https://img.engineeringhardware.com/Customized-Torshear-Type-High-Strength-Hexagon-Nuts-and-Plain-Washer-Dome-Tc-Bolt-for-Steel-Structures.webp)](https://engineeringhardware.com/product/customized-torshear-type-high-strength-hexagon-nuts-and-plain-washer-dome-tc-bolt/) Structural & Heavy Hex Bolts ### [Customized Torshear Type High Strength Hexagon Nuts and Plain Washer Dome Tc Bolt for Steel Structures](https://engineeringhardware.com/product/customized-torshear-type-high-strength-hexagon-nuts-and-plain-washer-dome-tc-bolt/) Torshear · DIN, ANSI, GB **US$0.012**MOQ 50 pieces [![8.8 Grade High-Strength Square Head Screw /Hot-DIP Galvanized Square Head Bolt](https://img.engineeringhardware.com/8-8-Grade-High-Strength-Square-Head-Screw-Hot-DIP-Galvanized-Square-Head-Bolt.webp)](https://engineeringhardware.com/product/8-8-grade-high-strength-square-head-screw-hot-dip-galvanized-square-head-bolt/) Structural & Heavy Hex Bolts ### [8.8 Grade High-Strength Square Head Screw /Hot-DIP Galvanized Square Head Bolt](https://engineeringhardware.com/product/8-8-grade-high-strength-square-head-screw-hot-dip-galvanized-square-head-bolt/) Square Head · DIN, ANSI, GB, JIS, BSW, GOST **US$0.024 – 1.20**MOQ 5,000 pieces **US$0.96 – 1.20**MOQ 1,000 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20High%20Strength%20Black%20Oxide%20Hex%20Socket%20Head%20Cap%20Bolt%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fhigh-strength-black-oxide-hex-socket-head-cap-bolt%2F)