--- title: "Black Oxide GB812 Class10 M12 Hex Nuts Round Nuts" description: "Black Oxide GB812 Class10 M12 Hex Nuts Round Nuts — Hex & Other Standard Nuts. Material: Carbon Steel, Grade: 10.9. MOQ 3 tons, US$1,740 – 1,860." url: https://engineeringhardware.com/product/black-oxide-gb812-class10-m12-hex-nuts-round-nuts/ source: Engineering Hardware & Fasteners --- # Black Oxide GB812 Class10 M12 Hex Nuts Round Nuts [![Black Oxide GB812 Class10 M12 Hex Nuts Round Nuts](https://img.engineeringhardware.com/Black-Oxide-GB812-Class10-M12-Hex-Nuts-Round-Nuts.webp)](https://img.engineeringhardware.com/Black-Oxide-GB812-Class10-M12-Hex-Nuts-Round-Nuts.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Nuts › Hex & Other Standard Nuts](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/black-oxide-gb812-class10-m12-hex-nuts-round-nuts.md) | **US$1,860**3–4 tons | **US$1,800**5–9 tons | **US$1,740**10+ tons | | --- | --- | --- | MOQ 3 tons · Final price confirmed in your quote - **Material:** Carbon Steel - **Head Style:** Round - **Standard:** DIN, ANSI, GB, JIS, GOST, BSW, ISO Uni - **Grade:** 10.9 - **Material Name:** 40cr/45/42CrMo/35CrMo - **Surface Treatment:** Black Oxide - **Materrial and surface teatment can be replaced with as below:** Mechnical Property - **Packing way:** 25kg/carton, 1.5tons-2.5tons / pallet ; or as requested by buyer. 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%20GB812%20Class10%20M12%20Hex%20Nuts%20Round%20Nuts%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fblack-oxide-gb812-class10-m12-hex-nuts-round-nuts%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 | Round Head | | Connection | Common Bolt | | Head Style | Round | | Standard | DIN, ANSI, GB, JIS, GOST, BSW, ISO Uni | | Grade | 10.9 | | Material Name | 40cr/45/42CrMo/35CrMo | | Property Class | Class10 | | Surface Treatment | Black Oxide | | Transport Package | Carton+Pallet | | Specification | 25kg/carton | | Origin | China | | HS Code | 73181600 | | Production Capacity | 1500tons/Month | | Materrial and surface teatment can be replaced with as below | Mechnical Property | | Packing way | 25kg/carton, 1.5tons-2.5tons / pallet ; or as requested by buyer. | | P.S. | Please contact us to re-quote the exact price before placing an order, due to material price is unstable. | | Category | [Hex & Other Standard Nuts](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) | ## Technical parameters | GB 812 - M12 - Class10 - Black Oxide | | --- | | Mechnical Property | Material | Surface Treatment | | --- | --- | --- | | Class 6 / 8/ 10 /12 | C45 40Cr 35CrMo 42CrMo | ♦Plain+oil ♦Zinc Plated ♦HDG ♦Phosphate ♦Dacromet ♦Geomet | | Other Special Round Nuts | | --- | | Our Factory Introduction | | --- | ## Description Black Oxide GB812 Class10 M12 Hex Nuts Round Nuts is part of our hex & other standard nuts range (Nuts). ### Key details - **Type:** Round Head - **Standard:** DIN, ANSI, GB, JIS, GOST, BSW, ISO Uni - **Material:** Carbon Steel - **Grade:** 10.9 - **Head Style:** Round - **Surface Treatment:** Black Oxide - **Connection:** Common Bolt - **Material Name:** 40cr/45/42CrMo/35CrMo Available configurations include material, head style, standard, grade and material name. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 3 tons at US$1,740 – 1,860 per ton. 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 GB812 Class10 M12 Hex Nuts Round Nuts? The listed minimum order is 3 tons, at US$1,740 – 1,860 per ton. 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$1,860 for 3–4 tons; US$1,800 for 5–9 tons; US$1,740 for 10+ tons. Final prices depend on size, material, finish and packing and are confirmed in your quote. ### What are the main specifications of Black Oxide GB812 Class10 M12 Hex Nuts Round Nuts? Type: Round Head; Standard: DIN, ANSI, GB, JIS, GOST, BSW, ISO Uni; Material: Carbon Steel; Grade: 10.9; Head Style: Round; Surface Treatment: Black Oxide. 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 material name. 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 hex & other standard nuts are available? The Hex & Other Standard Nuts category lists 8,354 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) 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 Hex & Other Standard Nuts →](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) [![Car Tire Hub Nuts Chrome Ruote Mag Wheel Lock Stainless Steel Nut](https://img.engineeringhardware.com/Car-Tire-Hub-Nuts-Chrome-Ruote-Mag-Wheel-Lock-Stainless-Steel-Nut.webp)](https://engineeringhardware.com/product/car-tire-hub-nuts-chrome-ruote-mag-wheel-lock-stainless-steel-nut/) Hex & Other Standard Nuts ### [Car Tire Hub Nuts Chrome Ruote Mag Wheel Lock Stainless Steel Nut](https://engineeringhardware.com/product/car-tire-hub-nuts-chrome-ruote-mag-wheel-lock-stainless-steel-nut/) Round Head · DIN, ANSI, GB, JIS, GOST **US$8.40 – 10.80**MOQ 10 pieces [![Nai-Lok 10mm 12mm 20mm Stainless Steel Hex NPT Panel Nuts Customized Hexagon Panel Nut for Pressure 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