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Anchors & Construction Fixings › Foundation & Anchor Bolts

R32s Self Drilling Anchor System Carbon Steel Anchor Bolt for Tunneling Mining Roof Bolting

Updated 2026-11-03 · Markdown version

Model no. hollow anchor bolt

US$2.76100–4,999 pieces

US$1.875,000–9,999 pieces

US$1.1910,000+ pieces

MOQ 100 pieces · Final price confirmed in your quote

Tolerance: +0/-0.2mm
Heat Treatment: Annealed
Tensile Strength: >180kN
Yield Strength: >125kN
Diameter: 22mm, 25mm, 28mm, 32mm, 51mm, 76mm, 108mm
Package Size: 80.00cm * 20.00cm * 20.00cm
Thread size: R25, R32, R38, R51, T76.
Thread standard: ISO10208, ISO1720 etc.

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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	After Received 1year
Warranty	After Received 1year
Model NO.	hollow anchor bolt
Application	Building Construction
Certification	CE, SGS
Tolerance	+0/-0.2mm
Heat Treatment	Annealed
Processing Service	Bending, Welding, Decoiling, Punching, Cutting
Tensile Strength	>180kN
Yield Strength	>125kN
Diameter	22mm, 25mm, 28mm, 32mm, 51mm, 76mm, 108mm
Report	SGS
Quality Control	100% Inspection
Thickness	2.75mm/3mm/3.5mm
Delivery Time	Within 10 Days
Transport Package	Standard Seaworthy Packing
Specification	R25 R32 R38 R51
Origin	China
HS Code	7308400100
Production Capacity	10000 Tons/Month
Package Size	80.00cm * 20.00cm * 20.00cm
Package Gross Weight	2.000kg
Thread size	R25, R32, R38, R51, T76.
Thread standard	ISO10208, ISO1720 etc.
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	Foundation & Anchor Bolts

Technical parameters

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)	ISO 10208	ISO 1720	MAI T76 Standard
Steel grade	En10083-1 (Alloy structure steel)

Bar Type	Outside Diameter(mm)	Inside Diameter(mm)	Cross section(mm2)	Ultimate LoadKN	Yield PointKN	Weight(kg/m)	Thread Left/Right Hand
T30/11	30	11	446	320	260	3.3	Lift or right
T30/14	30	14	395	260	220	2.9	Lift or right
T30/16	30	16	382	220	180	2.7	Lift or right
T40/16	40	16	879	660	525	7.0	Lift or right
T40/20	40	20	726	539	430	5.6	Lift or right
T52/26	52	26	1337	929	730	10.0	Lift or right
T73/53	73	53	1160	1630	970	12.3	Lift or right
T73/56	73	56	1094	1414	785	11.1	Lift or right
T73/45	73	45	2265	1630	1180	17.8	Lift or right

Cold deformed with geometry
	R25N	R32N	R32S	R38N	R51L	R51N	T76N	T76S
Dimention (mm)	150*150	200*200	200*200	200*200	200*200	250*250	250*250	250*250
Thickness (mm)	8	10	12	12	20	40	40	40
Hole diameter (mm)	30	35	35	41	60	60	80	80
Weight (KG/PC)	1.4	3	3.7	3.6	8.8	18.5	18	18

Machined steel coupling middle stop
	R25N	R32N	R32S	R38N	R51L	R51N	T76N	T76S
Outside diameter (mm)	35	42	42	52	63	63	95	95
Length (mm)	120	145	160or190	180	180	200	200	200
Weight	0.45	0.7	0.75	1.4	1.7	1.9	6.4	6.4

Machined steel bit or Casring steel bit
	R25N	R32N	R32S	R38N	R51L	R51N	T76N	T76S
Diameter (mm)	41,51	51,76,90	90,100,110,115,130	130,150,160,180,200
Hardened cross bit(EX)	Hardened cross bit for loose to medium dense condition with small boulders.
Tungsten cross bit(EXX)	TC cross bit for soft to medium rock for mations
Hardened button bit(ES)	Hardened buuton bit for unconsolidated rock with boulders.
Tungsten carbon button bit(ESS)	Button bit with TC inserts for medium rock for formations.
Hardened arch bit(EC)	Hardened drill bit with optimized geometry for uncon solid dated soilwith small boulders.
Tungsten carbon arch bit(ECC)	TC drill bit with optimized geometry for soft to medium rock formations.
Hardened drop center bit(EY)	Hardened cross bit for loose to medium dense ground conditions
TC drop center bit(EY)	TC drill bit for soft to medium rock formations.
Casting clay bit(EW)	Casting clay bit with optimized geometry for very soft to soft caly.

Machined steel nut or casting steel nut
	R25N	R32N	R32S	R38N	R51L	R51N	T76N	T76S
Key size (mm)	41	46	46	50	75	75	100	100
Length (mm)	135	45	45	55	70	70	80	80
Weight (kg/pc)	0.25	0.35	0.35	0.5	1.55	1.55	3.6	3.6

Description

R32s Self Drilling Anchor System Carbon Steel Anchor Bolt for Tunneling Mining Roof Bolting is part of our foundation & anchor bolts range (Anchors & Construction Fixings).

Key details

Diameter: 22mm, 25mm, 28mm, 32mm, 51mm, 76mm, 108mm
Thread size: R25, R32, R38, R51, T76.
Application: Building Construction
Certification: CE, SGS
Warranty: After Received 1year
Tolerance: +0/-0.2mm
Heat Treatment: Annealed
Processing Service: Bending, Welding, Decoiling, Punching, Cutting

Available configurations include tolerance, heat treatment, tensile strength, yield strength and diameter. 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$1.19 – 2.76 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 R32s Self Drilling Anchor System Carbon Steel Anchor Bolt for Tunneling Mining Roof Bolting?

The listed minimum order is 100 pieces, at US$1.19 – 2.76 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$2.76 for 100–4,999 pieces; US$1.87 for 5,000–9,999 pieces; US$1.19 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 R32s Self Drilling Anchor System Carbon Steel Anchor Bolt for Tunneling Mining Roof Bolting?

Diameter: 22mm, 25mm, 28mm, 32mm, 51mm, 76mm, 108mm; Thread size: R25, R32, R38, R51, T76.; Application: Building Construction; Certification: CE, SGS; Warranty: After Received 1year; Tolerance: +0/-0.2mm. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include tolerance, heat treatment, tensile strength, yield strength 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$1.19 – 2.76MOQ 100 piecesGet a quote WA