--- title: "Heavy Structural Nuts Metric Carbon Steel" description: "Heavy Structural Nuts Metric Carbon Steel — Hex & Other Standard Nuts. Material: Steel, Standard: ASTM. MOQ 1,000 pieces, US$0.12 – 1.20." url: https://engineeringhardware.com/product/heavy-structural-nuts-metric-carbon-steel/ source: Engineering Hardware & Fasteners --- # Heavy Structural Nuts Metric Carbon Steel [![Heavy Structural Nuts Metric Carbon Steel](https://img.engineeringhardware.com/Heavy-Structural-Nuts-Metric-Carbon-Steel.webp)](https://img.engineeringhardware.com/Heavy-Structural-Nuts-Metric-Carbon-Steel.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/heavy-structural-nuts-metric-carbon-steel.md) Model no. **A194** US$0.12 – 1.20 / piece MOQ 1,000 pieces · Final price confirmed in your quote - **Material:** Steel - **Standard:** ASTM - **Grade:** 4 6 8 - **Finish:** Zinc/Black Plated/HDG Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Heavy%20Structural%20Nuts%20Metric%20Carbon%20Steel%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fheavy-structural-nuts-metric-carbon-steel%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 | Steel | | Standard | ASTM | | Model NO. | A194 | | Grade | 4 6 8 | | System of Measurement | Metric | | Product Name | Hex Nut | | Measurement System | Metric | | Finish | Zinc/Black Plated/HDG | | Application | General Industry | | Origin | Zhejiang, China | | Production Capacity | 100000 Piece/Pieces Per Month | | OEM/ODM Services | Yes, we offer OEM/ODM services. | | Quality Guarantee | We follow strict quality control measures under the ISO9001 system to ensure all products are 100% qualified with lifetime warranty support. | | Trustworthiness | As a Gold member of *** and Made in China, we have credit guarantees from *** Group, ensuring safe direct orders through ***. | | Pricing | We provide high-quality products at competitive prices. Contact us for a quote. | | Quality Control | Our QC team inspects every production link, providing MTC and mill certificates upon completion. | | Free Samples | New customers can receive free standard fastener samples, with client-covered express charges. Old customers receive free samples with charges covered by us. | | Acceptance of Small Orders | We accept orders of any size and maintain stock for various fasteners, with quick production capabilities. | | Delivery Time | Stocked items can be delivered within 15 days, while larger quantities may take 25-35 days. | | Packaging | Our standard packaging is 20-25kg per carton, with customized options available upon request. | | Payment Terms | We accept T/T, L/C, and D/P for general orders, and Paypal and Western Union for small or sample orders. | | Category | [Hex & Other Standard Nuts](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) | ## Technical parameters | item | value | | --- | --- | | Finish | Zinc | | Measurement system | Metric | | Application | General Industry | | Place of Origin | China | | | Zhejiang | | Model Number | A194 | | Standard | ASTM | | Product name | Hex Nut | | Material | Steel | | Standard | ASTM | | System of Measurement | Metric | | Finish | ZINC/Black Plated/HDG | ## Description Heavy Structural Nuts Metric Carbon Steel is part of our hex & other standard nuts range (Nuts). ### Key details - **Standard:** ASTM - **Material:** Steel - **Grade:** 4 6 8 - **Finish:** Zinc/Black Plated/HDG - **Application:** General Industry - **System of Measurement:** Metric - **Product Name:** Hex Nut - **Measurement System:** Metric Available configurations include material, standard, grade and finish. 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$0.12 – 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 Heavy Structural Nuts Metric Carbon Steel? The listed minimum order is 1,000 pieces, at US$0.12 – 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. ### What are the main specifications of Heavy Structural Nuts Metric Carbon Steel? Standard: ASTM; Material: Steel; Grade: 4 6 8; Finish: Zinc/Black Plated/HDG; Application: General Industry; System of Measurement: Metric. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include material, standard, grade and finish. 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/) ## 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