--- title: "Underground Coal Mine Support High Strength Twist Bolt for Mining" description: "Underground Coal Mine Support High Strength Twist Bolt for Mining — Structural & Heavy Hex Bolts. Standard: GB. MOQ 400 pieces, US$1.26 – 4.40." url: https://engineeringhardware.com/product/underground-coal-mine-support-high-strength-twist-bolt-for-mining/ source: Engineering Hardware & Fasteners --- # Underground Coal Mine Support High Strength Twist Bolt for Mining [![Underground Coal Mine Support High Strength Twist Bolt for Mining](https://img.engineeringhardware.com/Underground-Coal-Mine-Support-High-Strength-Twist-Bolt-for-Mining.webp)](https://img.engineeringhardware.com/Underground-Coal-Mine-Support-High-Strength-Twist-Bolt-for-Mining.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/underground-coal-mine-support-high-strength-twist-bolt-for-mining.md) Model no. **twist rock bolt** | **US$4.40**400–4,999 pieces | **US$2.36**5,000–9,999 pieces | **US$1.26**10,000+ pieces | | --- | --- | --- | MOQ 400 pieces · Final price confirmed in your quote - **Standard:** GB - **Surface Treatment:** Galvanized - **Color:** Black,Silver - **Finish:** Bright(Uncoated),Longer Life Ticn - **Diameter:** 16-22mm - **Length:** 300-350mm - **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%20Underground%20Coal%20Mine%20Support%20High%20Strength%20Twist%20Bolt%20for%20Mining%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Funderground-coal-mine-support-high-strength-twist-bolt-for-mining%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 | | --- | --- | | Certification | CE, ISO 9001:2000 | | Standard | GB | | Model NO. | twist rock bolt | | Surface Treatment | Galvanized | | Manufacturing Process | Forging | | Product Name | Long Twist Bolt | | Color | Black,Silver | | Finish | Bright(Uncoated),Longer Life Ticn | | System of Measurement | Customized Sizes | | Diameter | 16-22mm | | Capacity | High Bearing Capacity | | Type | Rebar and Round Steel | | Length | 300-350mm | | Function | Easy to Cut | | Application | Mine Support | | Sample | Available | | Quality | Excellent | | Delivery Time | 15-20days | | Specification | 235B | | Origin | China | | HS Code | 7308909900 | | Production Capacity | 50000 Pieces/Year | | 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; | | Accepted Payment Currency | USD; | | Accepted Payment Type | T/T,L/C,D/P D/A; | | Language Spoken | English,Chinese | | Category | [Structural & Heavy Hex Bolts](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) | ## Technical parameters | item | value | | --- | --- | | Color | silver, Black | | Finish | Bright(Uncoated), Longer Life TiCN | | System of Measurement | Customized Sizes | | Material | Steel | | Diameter | 5/16IN, 12mm | | Capacity | High bearing capacity | | Type | Rebar and round steel | | Function | Easy to cut | | Application | Mine support | | Diameter | 24/25/28/30/32mm | | Sample | Availabe | | Quality | Excellent | | Standard | GB | | Model Number | 16.18.20 | | Length | 300-350mm, customized | ## Description Underground Coal Mine Support High Strength Twist Bolt for Mining is part of our structural & heavy hex bolts range (Bolts). ### Key details - **Type:** Rebar and Round Steel - **Standard:** GB - **Diameter:** 16-22mm - **Length:** 300-350mm - **Surface Treatment:** Galvanized - **Finish:** Bright(Uncoated),Longer Life Ticn - **Application:** Mine Support - **Certification:** CE, ISO 9001:2000 Available configurations include standard, surface treatment, color, finish and diameter. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 400 pieces at US$1.26 – 4.40 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 Underground Coal Mine Support High Strength Twist Bolt for Mining? The listed minimum order is 400 pieces, at US$1.26 – 4.40 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$4.40 for 400–4,999 pieces; US$2.36 for 5,000–9,999 pieces; US$1.26 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 Underground Coal Mine Support High Strength Twist Bolt for Mining? Type: Rebar and Round Steel; Standard: GB; Diameter: 16-22mm; Length: 300-350mm; Surface Treatment: Galvanized; Finish: Bright(Uncoated),Longer Life Ticn. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include standard, surface treatment, color, finish 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 & 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/) [![DIN976 8.8-Grade High-Strength Double-End Bolts Threaded Studs Zinc Finish Black Heavy Industry Use 3-Year Warranty OEM](https://img.engineeringhardware.com/DIN976-8-8-Grade-High-Strength-Double-End-Bolts-Threaded-Studs-Zinc-Finish-Black-Heavy-Industry-Use-3-Year-Warranty-OEM.webp)](https://engineeringhardware.com/product/din976-8-8-grade-high-strength-double-end-bolts-threaded-studs-zinc-finish-black/) Structural & Heavy Hex Bolts ### [DIN976 8.8-Grade High-Strength Double-End Bolts Threaded Studs Zinc Finish Black Heavy Industry Use 3-Year Warranty OEM](https://engineeringhardware.com/product/din976-8-8-grade-high-strength-double-end-bolts-threaded-studs-zinc-finish-black/) Round Head · DIN, ANSI, GB, JIS, BSW, GOST **US$0.06 – 0.36**MOQ 10,000 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400 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Underground%20Coal%20Mine%20Support%20High%20Strength%20Twist%20Bolt%20for%20Mining%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Funderground-coal-mine-support-high-strength-twist-bolt-for-mining%2F)