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Anchors & Construction Fixings › Foundation & Anchor Bolts

Robust Rock Bolt Steel Threaded Rod Hollow Anchor Bolt for Tunnel Construction

Updated 2026-11-03 · Markdown version

Model no. 25-51mm

US$2.64500–4,999 pieces

US$2.405,000–9,999 pieces

US$2.1610,000+ pieces

MOQ 500 pieces · Final price confirmed in your quote

Surface Treatment: Without Processing
Material: S45c / 40cr/37mn
Size: 25-51mm
Product Grade: S-Class
Package Size: 5.00cm * 20.00cm * 20.00cm

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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

Model NO.	25-51mm
Certification	ISO 9001:2008, Test Report
Surface Treatment	Without Processing
Material	S45c / 40cr/37mn
Size	25-51mm
Shape	Round Thread
Product Grade	S-Class
Installation	Easy Installation
Function	Used to Rock Control Tunnel Slope Stabilization
Transport Package	According to Customer Requirements
Origin	Changzhou, Jiangsu
HS Code	7318190000
Production Capacity	50000000PCS/Year
Package Size	5.00cm * 20.00cm * 20.00cm
Package Gross Weight	8.000kg
Lead Time	14 days (1 - 1000 Pieces) To be negotiated ( > 1000 Pieces)
Customization	Available
After-sales Service	1 Year
Warranty	1 Year
Shipping Cost	Contact the supplier about freight and estimated delivery time.
ISO 14001	2015
ISO 9001	2015
ISO 45001	2018
Rebar Couplers	Threaded (e. g. Standard straight-thread, rib-peeling straight-thread, Upset Forging, Taper threaded, Epoxy Coated, Split, Weldable rebar coupler) and non-threaded (e. g. Grouting, cold extrusion, bolted, quick-connect) couplers.
Rebar Processing Equipment	Upsetting machines, threading machines, and more.
Seamless Steel Pipes	Stainless and carbon steel pipes.
Other Steel Products	CSL Pipes, Hollow anchor rods, and rebar-related products.
Category	Foundation & Anchor Bolts

Technical parameters

Rebar	Hollow Rod Body
Diameter	Yield Strength	Ultimate Strength	Yield Force	Maximum Force	Elongation After Fracture	Diameter	Yield Strength	Ultimate Strength	Yield Force
≥	≥
20mm	335MPa	455MPa	105kN	142kN	17%	30mm	325MPa	490MPa	106kN
20mm	400MPa	540MPa	126kN	170kN	16%	30mm	127kN
22mm	335MPa	455MPa	127kN	172kN	17%
25mm	335MPa	455MPa	164kN	223kN	17%	32mm	159kN

Description

Robust Rock Bolt Steel Threaded Rod Hollow Anchor Bolt for Tunnel Construction is part of our foundation & anchor bolts range (Anchors & Construction Fixings).

Key details

Material: S45c / 40cr/37mn
Size: 25-51mm
Surface Treatment: Without Processing
Certification: ISO 9001:2008, Test Report
Shape: Round Thread
Product Grade: S-Class
Installation: Easy Installation
Function: Used to Rock Control Tunnel Slope Stabilization

Available configurations include surface treatment, material, size, product grade and package size. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

Ordering through Engineering Hardware & Fasteners

Minimum order is 500 pieces at US$2.16 – 2.64 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 Robust Rock Bolt Steel Threaded Rod Hollow Anchor Bolt for Tunnel Construction?

The listed minimum order is 500 pieces, at US$2.16 – 2.64 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$2.64 for 500–4,999 pieces; US$2.40 for 5,000–9,999 pieces; US$2.16 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 Robust Rock Bolt Steel Threaded Rod Hollow Anchor Bolt for Tunnel Construction?

Material: S45c / 40cr/37mn; Size: 25-51mm; Surface Treatment: Without Processing; Certification: ISO 9001:2008, Test Report; Shape: Round Thread; Product Grade: S-Class. 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, size, product grade and package size. 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 foundation & anchor bolts are available?

The Foundation & Anchor Bolts category lists 2,223 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/anchors-construction-fixings/foundation-anchor-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

More about us → · Request a sample or custom quote →

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US$2.16 – 2.64MOQ 500 piecesGet a quote WA