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Anchors & Construction Fixings › Foundation & Anchor Bolts

Self Drilling Anchor Bolt Threaded Hollow Bolts for Mining

Updated 2026-11-03 · Markdown version

Model no. R32 R25 R51 T76

US$2.52500–4,999 meters

US$2.405,000–9,999 meters

US$2.2810,000+ meters

MOQ 500 meters · Final price confirmed in your quote

Standard: AISI, ASME, BS, ANSI, JIS, GB, GOST, ASTM, DIN
Surface Treatment: Without Processing
Material: Carbon Steel
Length: Custom Length
Diameter: Custom Diameter
Materials: High Strength
Surface: Antirust Coating or Zinc Plating
Thread size: R25, R32, R38, R51, T76.

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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

Customization	Available
After-sales Service	Can Exchange Goods
Warranty	2 Year
Model NO.	R32 R25 R51 T76
Certification	ISO 9001:2000, ISO 9001:2008
Standard	AISI, ASME, BS, ANSI, JIS, GB, GOST, ASTM, DIN
Surface Treatment	Without Processing
Manufacturing Process	Hot Rolled
Material	Carbon Steel
Terms of Payment	30%T/T Advance + 70% Balance
Trade Terms	EXW Fob CFR CIF
Place of Origin	China
Length	Custom Length
Diameter	Custom Diameter
Materials	High Strength
Surface	Antirust Coating or Zinc Plating
Way to Install	According to Actual Engineering
Installation Method	Pre-Stressed Anchor,Traction Bolt,Grouted Rock Bol
Marking and Numbering	Custom
Transport Package	Standard Seaworthy Packing
Specification	1/8''-24'' SCH40 SCH80 STD or customization
Origin	Liaocheng Shandong
HS Code	7308
Production Capacity	300000tons/Year
Instructions	R thread anchor bar or called rock rod, soil nail, which is a kind of threaded hollow bar, bar surface with an rope thread according to ISO 10208 & 1720. It was firstly invented by MAI on 1960S to solve the low construction speed on complicated underground works, nowadays; it is very popular all around the world.
Thread size	R25, R32, R38, R51, T76.
Thread standard	ISO10208, ISO1720 etc.
Category	Foundation & Anchor Bolts

Technical parameters

Length	Custom Length
Way to Install	According to Actual Engineering
Marking and Numbering	Custom

Terms of Payment	30%T/T Advance + 70% Balance
Trade Terms	EXW Fob CFR CIF
Place of Origin	China
Diameter	Custom Diameter
Materials	40cr
Surface	Antirust Coating or Zinc Plating

Compared to carbon steel, alloy structure steel has high anti-corrosion capacity and high mechanical.
	R25N	R32N	R32S	R38N	R51L	R51N	T76N	T76S
Outside diameter(mm)	25	32	32	38	51	51	76	76
Internal diameter(mm)	14	19	16	19	36	33	52	45
Ultimate loadcapacity(KN)	200	280	360	500	550	800	1600	1900
Yield loadcapacity(KN)	150	230	280	400	450	630	1200	1500
Tensile strength,Rp0.2(N/mm2)	800	800	800	800	800	800	800	800
Yield strength,Rp0.2(N/mm2)	650	650	650	650	650	650	650	650
Weight(Kg/m)	2.3	3.2	3.6	5.5	6.5	8.0	16.0	19.7
Thread type(left-hand)	ISO10208	ISO1720	MAI T76 Standard
Steel grade	En10083-1(Alloy structure steel)

Description

Self Drilling Anchor Bolt Threaded Hollow Bolts for Mining is part of our foundation & anchor bolts range (Anchors & Construction Fixings).

Key details

Standard: AISI, ASME, BS, ANSI, JIS, GB, GOST, ASTM, DIN
Material: Carbon Steel
Diameter: Custom Diameter
Thread size: R25, R32, R38, R51, T76.
Length: Custom Length
Surface Treatment: Without Processing
Certification: ISO 9001:2000, ISO 9001:2008
Warranty: 2 Year

Available configurations include standard, surface treatment, material, length and diameter. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

Ordering through Engineering Hardware & Fasteners

Minimum order is 500 meters at US$2.28 – 2.52 per meter. 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 Self Drilling Anchor Bolt Threaded Hollow Bolts for Mining?

The listed minimum order is 500 meters, at US$2.28 – 2.52 per meter. 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$2.52 for 500–4,999 meters; US$2.40 for 5,000–9,999 meters; US$2.28 for 10,000+ meters. Final prices depend on size, material, finish and packing and are confirmed in your quote.

What are the main specifications of Self Drilling Anchor Bolt Threaded Hollow Bolts for Mining?

Standard: AISI, ASME, BS, ANSI, JIS, GB, GOST, ASTM, DIN; Material: Carbon Steel; Diameter: Custom Diameter; Thread size: R25, R32, R38, R51, T76.; Length: Custom Length; Surface Treatment: Without Processing. 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, material, 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 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

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US$2.28 – 2.52MOQ 500 metersGet a quote WA