--- title: "Using in Engineering Projects Precision Casting High-Strength Steel Bolts" description: "Using in Engineering Projects Precision Casting High-Strength Steel Bolts — Structural & Heavy Hex Bolts. Standard: ASTM. MOQ 100 pieces, US$1.20 – 24.00." url: https://engineeringhardware.com/product/using-in-engineering-projects-precision-casting-high-strength-steel-bolts/ source: Engineering Hardware & Fasteners --- # Using in Engineering Projects Precision Casting High-Strength Steel Bolts [![Using in Engineering Projects Precision Casting High-Strength Steel Bolts](https://img.engineeringhardware.com/Using-in-Engineering-Projects-Precision-Casting-High-Strength-Steel-Bolts.webp)](https://img.engineeringhardware.com/Using-in-Engineering-Projects-Precision-Casting-High-Strength-Steel-Bolts.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/using-in-engineering-projects-precision-casting-high-strength-steel-bolts.md) US$1.20 – 24.00 / piece MOQ 100 pieces · Final price confirmed in your quote - **Material:** Superalloy, Aluminum Alloy - **Surface Preparation:** Polishing/Sand Blast/Spray-Paint - **Surface Roughness:** Ra 0.8-Ra3.2 According to Customer Requirement - **Machining Tolerance:** +/-0.01mm - **Standard:** ASTM Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Using%20in%20Engineering%20Projects%20Precision%20Casting%20High-Strength%20Steel%20Bolts%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fusing-in-engineering-projects-precision-casting-high-strength-steel-bolts%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 | | --- | --- | | Casting Method | None | | Process | Investment Casting | | Molding Technics | CNC Machining | | Application | Machinery Parts/Auto Parts/Hardware | | Material | Superalloy, Aluminum Alloy | | Surface Preparation | Polishing/Sand Blast/Spray-Paint | | Surface Roughness | Ra 0.8-Ra3.2 According to Customer Requirement | | Machining Tolerance | +/-0.01mm | | Standard | ASTM | | Certification | CE, ISO 9001:2000, ISO 9001:2008 | | Service | Custom Carbon Steel Water Pump Impeller | | Transport Package | Packed with Free Fumigating Wooden Case | | Specification | Customized | | Origin | Shandong, China | | Production Capacity | 100000 Piece/Pieces Per Month | | Category | [Structural & Heavy Hex Bolts](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) | ## Technical parameters | Nominal Size | d | S | k | | | | | | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Major Diameter | Width Across Flats | Head Height | | | | | | | | | Min. | Max | Max. | Min | Grade A | Grade B | | | | | | Grade A | Grade B | Min | Max. | Min. | Max | | | | | | M3 | 2.874 | 2.980 | 5.5 | 5.32 | - | 1.88 | 2.12 | - | - | | M4 | 3.838 | 3.978 | 7 | 6.78 | - | 2.68 | 2.92 | - | - | | M5 | 4.826 | 4.976 | 8 | 7.78 | - | 3.35 | 3.65 | - | - | | M6 | 5.794 | 5.974 | 10 | 9.78 | - | 3.85 | 4.15 | - | - | | M7 | 6.794 | 6.974 | 11 | 10.73 | - | 4.65 | 4.95 | - | - | | M8 | 7.760 | 7.972 | 13 | 12.73 | - | 5.15 | 5.45 | - | - | | M10 | 9.732 | 9.968 | 17 | 16.73 | - | 6.22 | 6.58 | - | - | | M12 | 11.701 | 11.966 | 19 | 18.67 | - | 7.32 | 7.68 | - | - | | M14 | 13.682 | 13.962 | 22 | 21.67 | - | 8.62 | 8.98 | - | - | | M16 | 15.682 | 15.962 | 24 | 23.67 | 23.16 | 9.82 | 10.18 | 9.71 | 10.29 | | M18 | 17.623 | 17.958 | 27 | 26.67 | 26.16 | 11.28 | 11.72 | 11.15 | 11.85 | | M20 | 19.623 | 19.958 | 30 | 29.67 | 29.16 | 12.28 | 12.72 | 12.15 | 12.85 | | M22 | 21.623 | 21.958 | 32 | 31.61 | 31 | 13.78 | 14.22 | 13.65 | 14.35 | | M24 | 23.577 | 23.952 | 36 | 35.38 | 35 | 14.78 | 15.22 | 14.65 | 15.35 | | M27 | 26.577 | 26.952 | 41 | - | 40 | - | - | 16.65 | 17.35 | | M30 | 29.522 | 29.947 | 46 | - | 45 | - | - | 18.28 | 19.12 | | M33 | 32.522 | 32.947 | 50 | - | 49 | - | - | 20.58 | 21.42 | | M36 | 35.465 | 35.940 | 55 | - | 53.8 | - | - | 22.08 | 22.92 | | M39 | 38.465 | 38.940 | 60 | - | 58.8 | - | - | 24.58 | 25.42 | ## Description Using in Engineering Projects Precision Casting High-Strength Steel Bolts is part of our structural & heavy hex bolts range (Bolts). ### Key details - **Standard:** ASTM - **Material:** Superalloy, Aluminum Alloy - **Application:** Machinery Parts/Auto Parts/Hardware - **Certification:** CE, ISO 9001:2000, ISO 9001:2008 - **Casting Method:** None - **Process:** Investment Casting - **Molding Technics:** CNC Machining - **Surface Preparation:** Polishing/Sand Blast/Spray-Paint Available configurations include material, surface preparation, surface roughness, machining tolerance and standard. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 100 pieces at US$1.20 – 24.00 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 Using in Engineering Projects Precision Casting High-Strength Steel Bolts? The listed minimum order is 100 pieces, at US$1.20 – 24.00 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 Using in Engineering Projects Precision Casting High-Strength Steel Bolts? Standard: ASTM; Material: Superalloy, Aluminum Alloy; Application: Machinery Parts/Auto Parts/Hardware; Certification: CE, ISO 9001:2000, ISO 9001:2008; Casting Method: None; Process: Investment Casting. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include material, surface preparation, surface roughness, machining tolerance and standard. 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/) [![Metis High Strength Self Drilling Injection Hollow Anchor Bar Bolt](https://img.engineeringhardware.com/Metis-High-Strength-Self-Drilling-Injection-Hollow-Anchor-Bar-Bolt.webp)](https://engineeringhardware.com/product/metis-high-strength-self-drilling-injection-hollow-anchor-bar-bolt/) Structural & Heavy Hex Bolts ### [Metis High Strength Self Drilling Injection Hollow Anchor Bar Bolt](https://engineeringhardware.com/product/metis-high-strength-self-drilling-injection-hollow-anchor-bar-bolt/) Soil Nailing · CE, ISO, SGS **US$3.00 – 3.96**MOQ 1 meter [![High Strength Heavy Truck Center Bolts Spring 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