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Anchors & Construction Fixings › Foundation & Anchor Bolts

High-Strength 20mnsi Grouting Anchor Bolt for Foundation Stability

Updated 2026-11-03 · Markdown version

Model no. hollow anchor bolt

US$3.60100–4,999 pieces

US$2.405,000–9,999 pieces

US$1.8010,000+ pieces

MOQ 100 pieces · Final price confirmed in your quote

Standard: BS, GB, ASTM
Surface Treatment: Without Processing
Material: Carbon Steel
Color: Silver, Black, Gray
Surface: Antirust Coating or Zinc Plating
Length: Custom Length
Package Size: 20.00cm * 10.00cm * 5.00cm

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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

Customization	Available
After-sales Service	After Received 1 Year
Warranty	After Received 1 Year
Model NO.	hollow anchor bolt
Certification	CE, RoHS, ISO 9001:2000, ISO 9001:2008, SGS
Standard	BS, GB, ASTM
Surface Treatment	Without Processing
Manufacturing Process	Forging
Material	Carbon Steel
Color	Silver, Black, Gray
Surface	Antirust Coating or Zinc Plating
Installation Method	Pre-Stressed Anchor,Traction Bolt,Grouted Rock Bol
Length	Custom Length
Delivery Time	15-30days
Sample	Availabe
Transport Package	Standard Seaworthy Packing
Specification	R25 R32 R38 R51
Origin	Handan China
HS Code	7308400100
Production Capacity	300000tons/Year
Package Size	20.00cm * 10.00cm * 5.00cm
Package Gross Weight	1.500kg
Features of Hollow Grouting Anchor Bar	• Fits standard Boomer, ROC and Mustang rigs.
Advantages and Characteristics	1.No casings required, because anchor bars can be drilled into loose soils without needing casings to support the boreholes.
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	Foundation & Anchor Bolts

Technical parameters

BAR DIAMETER	AVERAGE INNER DIAMETER	MINIMUM NET AREA THROUGH THREADS	MINIMUM ULTIMATE STRENGTH	MINIMUM YIELD STRENGTH	NOMINAL WEIGHT	PART NUMBER
32 mm (1-1/4")	0.787" (20.0 mm)	0.556 in² (359 mm²)	58.4 kips (260 kN)	47.2 kips (210 kN)	2.1 lbs/ft (3.1 kg/m)	B7X1-032N
32S mm (1-1/4")	0.626" (15.9 mm)	0.776 in² (501 mm²)	81.5 kips (363 kN)	66.0 kips (294 kN)	2.7 lbs/ft (4.0 kg/m)	B7X1-032S
38 mm (1-1/2")	0.830" (21.1 mm)	1.067 in² (688 mm²)	112 kips (498 kN)	90.7 kips (404 kN)	3.76 lbs/ft (5.6 kg/m)	B7X1-038N
51 mm (2")	1.187" (30.1 mm)	1.795 in² (1158 mm²)	188 kips (837 kN)	152 kips (677 kN)	6.26 lbs/ft (9.3 kg/m)	B7X1-051N
76 mm (3")	1.890" (48.0 mm)	3.880 in² (2503 mm²)	407 kips (1811 kN)	329 kips (1466 kN)	13.79 lbs/ft (20.5 kg/m)	B7X1-076N

item	value
Color	silver, Black
Finish	Bright(Uncoated), Longer Life TiCN
System of Measurement	INCH, Metric
Place of Origin	China
	Hebei
Model Number	hollow grout rock bolt
Material	Steel
Diameter	12mm
Capacity	Strong
Standard	GB
Product name	Hollow Grout Rock Bolt
Length	Customized Length
Sample	Availabe
Raw Material	Steel
Application	Mining
Feature	Easy Install
Delivery time	15-30days
PAYMENT	30% Deposit+70% Balance
Quality	Excellent

Description

High-Strength 20mnsi Grouting Anchor Bolt for Foundation Stability is part of our foundation & anchor bolts range (Anchors & Construction Fixings).

Key details

Standard: BS, GB, ASTM
Material: Carbon Steel
Length: Custom Length
Surface Treatment: Without Processing
Certification: CE, RoHS, ISO 9001:2000, ISO 9001:2008, SGS
Warranty: After Received 1 Year
Manufacturing Process: Forging
Color: Silver, Black, Gray

Available configurations include standard, surface treatment, material, color and surface. 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$1.80 – 3.60 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 20mnsi Grouting Anchor Bolt for Foundation Stability?

The listed minimum order is 100 pieces, at US$1.80 – 3.60 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$3.60 for 100–4,999 pieces; US$2.40 for 5,000–9,999 pieces; US$1.80 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 20mnsi Grouting Anchor Bolt for Foundation Stability?

Standard: BS, GB, ASTM; Material: Carbon Steel; Length: Custom Length; Surface Treatment: Without Processing; Certification: CE, RoHS, ISO 9001:2000, ISO 9001:2008, SGS; Warranty: After Received 1 Year. 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, color and surface. 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$1.80 – 3.60MOQ 100 piecesGet a quote WA