--- title: "High Strength S420mc Friction Bolt for Mining Support" description: "High Strength S420mc Friction Bolt for Mining Support — Structural & Heavy Hex Bolts. Material: Carbon Steel. MOQ 300 pieces, US$2.23 – 3.00." url: https://engineeringhardware.com/product/high-strength-s420mc-friction-bolt-for-mining-support/ source: Engineering Hardware & Fasteners --- # High Strength S420mc Friction Bolt for Mining Support [![High Strength S420mc Friction Bolt for Mining Support](https://img.engineeringhardware.com/High-Strength-S420mc-Friction-Bolt-for-Mining-Support.webp)](https://img.engineeringhardware.com/High-Strength-S420mc-Friction-Bolt-for-Mining-Support.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-s420mc-friction-bolt-for-mining-support.md) Model no. **33mm 39mm 42mm 47mm** | **US$3.00**300–1,999 pieces | **US$2.59**2,000–9,999 pieces | **US$2.23**10,000+ pieces | | --- | --- | --- | MOQ 300 pieces · Final price confirmed in your quote - **Surface Treatment:** Galvanized - **Material:** Carbon Steel - **Color:** Black,Silver - **Length:** Customized Length - **Diameter:** 33,40,42,43mm - **Finish:** Longer Life Ticn - **Package Size:** 80.00cm * 20.00cm * 20.00cm Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20High%20Strength%20S420mc%20Friction%20Bolt%20for%20Mining%20Support%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fhigh-strength-s420mc-friction-bolt-for-mining-support%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 | | --- | --- | | After-sales Service | After Received 1year | | Warranty | After Received 1year | | Model NO. | 33mm 39mm 42mm 47mm | | Certification | CE, RoHS, ISO 9001:2000, ISO 9001:2008, SGS | | Surface Treatment | Galvanized | | Manufacturing Process | Forging | | Material | Carbon Steel | | Product Name | Mining Friction Bolt Split Sets | | Color | Black,Silver | | Length | Customized Length | | Diameter | 33,40,42,43mm | | Application | Mining,Tunneling | | Feature | Easy Install | | Delivery Time | 15-30 Days | | Quality | Excellent | | OEM/ODM | Accpect | | Finish | Longer Life Ticn | | System of Measurement | Metric | | Usage | Mine,Slope,Foundation Pit | | Transport Package | Customized | | Specification | Q235/355B/16Mn | | Origin | China | | HS Code | 7308400100 | | Production Capacity | 10000 Tons/Month | | Package Size | 80.00cm * 20.00cm * 20.00cm | | Package Gross Weight | 1.500kg | | Our enterprise vision is | casting industry famous brand, building industrial and mining leading enterprises. | | Accepted Delivery Terms | FOB,CIF,EXW,Express Delivery; | | Accepted Payment Currency | USD; | | Accepted Payment Type | T/T,Credit Card,Western Union,Cash; | | Language Spoken | English,Chinese | | Category | [Structural & Heavy Hex Bolts](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) | ## Technical parameters | Diameter(±0.5) | 33mm | 39mm | 40mm | 42mm | 46mm | 47mm | | --- | --- | --- | --- | --- | --- | --- | | Length(±0.5) | 1.2m | 1.5m | 1.9m | 2.0m | 2.5m | 3m | | Mining Plate(±0.5) | 140*140*6mm,150*150*5mm,200*200*10mm | | | | | | | Material | Q235,16Mn,20 Mnsi | | | | | | ## Description High Strength S420mc Friction Bolt for Mining Support is part of our structural & heavy hex bolts range (Bolts). ### Key details - **Material:** Carbon Steel - **Diameter:** 33,40,42,43mm - **Length:** Customized Length - **Surface Treatment:** Galvanized - **Finish:** Longer Life Ticn - **Application:** Mining,Tunneling - **Certification:** CE, RoHS, ISO 9001:2000, ISO 9001:2008, SGS - **Warranty:** After Received 1year Available configurations include surface treatment, material, color, length and diameter. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 300 pieces at US$2.23 – 3.00 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 High Strength S420mc Friction Bolt for Mining Support? The listed minimum order is 300 pieces, at US$2.23 – 3.00 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$3.00 for 300–1,999 pieces; US$2.59 for 2,000–9,999 pieces; US$2.23 for 10,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote. ### What are the main specifications of High Strength S420mc Friction Bolt for Mining Support? Material: Carbon Steel; Diameter: 33,40,42,43mm; Length: Customized Length; Surface Treatment: Galvanized; Finish: Longer Life Ticn; Application: Mining,Tunneling. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include surface treatment, material, color, length and diameter. 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 & 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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/) [![Heavy Hexbolt Black Grade 8.8 10.9 12.9 DIN933 DIN931 ASTM Carbon Steel Hex Bolts](https://img.engineeringhardware.com/Heavy-Hexbolt-Black-Grade-8-8-10-9-12-9-DIN933-DIN931-ASTM-Carbon-Steel-Hex-Bolts.webp)](https://engineeringhardware.com/product/heavy-hexbolt-black-grade-8-8-10-9-12-9-din933-din931-astm-carbon-steel-hex-bolts/) Structural & Heavy Hex Bolts ### [Heavy Hexbolt Black Grade 8.8 10.9 12.9 DIN933 DIN931 ASTM Carbon Steel Hex Bolts](https://engineeringhardware.com/product/heavy-hexbolt-black-grade-8-8-10-9-12-9-din933-din931-astm-carbon-steel-hex-bolts/) Hexagon Head · DIN, ANSI, GB, JIS, BSW, GOST **US$1,044**MOQ 1 ton [![Wholesale DIN6914 Carbon Steel Grade 10.9 12.9 Heavy Hexagon Bolts with Large Widths Across Flats for Structural 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