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Right-angle couplers

Right-angle couplers
The right-angle coupler (commonly called a fixed coupler ) is the most frequently used connector in coupler-type steel scaffolding systems. It is designed to rigidly connect two steel tubes at a 90° perpendicular crossing, typically used to join vertical posts and horizontal ledgers. Our right-angle couplers are manufactured from malleable cast iron or cast steel through precision casting, machining, and surface anti-corrosion treatment. They feature rational design, high clamping force, and reliable safety, conforming to national and international standards, and are widely used in scaffolding systems.
Category:Coupler Series
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Product Description

Product Classification

Category

Type

Description

By Material

Malleable Cast Iron (KTH330-08)

Good toughness, cost-effective, widely used in China


Cast Steel (ZG230-450)

Higher strength, greater load capacity

By Surface Finish

Bare (with anti-rust oil)

Lowest cost, requires on-site oiling


Electro-galvanized

Bright surface, mild corrosion protection


Hot-dip Galvanized

Thick zinc coating, excellent corrosion resistance


Painted (various colours)

Clean appearance, custom colours available

By Fitted Pipe OD

Φ48 Type

For 48mm OD pipes (standard)


Φ60 Type

For 60mm OD pipes (heavy-duty)

Main Technical Parameters

Parameter

Specification

Fitted Pipe OD

Φ48 mm (standard) / Φ60 mm

Weight (approx.)

0.9 ~ 1.2 kg/piece (Φ48 type)

Bolt Size

M12 × 72 mm (or as required)

Nut Size

M12 hexagon nut

Tightening Torque

40 ~ 65 N·m

Slip Resistance (P)

Passed (per GB 15831 test)

Ultimate Load Resistance

Passed (per GB 15831 test)

Torsional Stiffness

Passed (per GB 15831 test)

Weight may vary slightly by material and manufacturing; actual product prevails.

Materials & Standards

Material

Tensile Strength (MPa)

Elongation (%)

Standard

KTH330-08 (Malleable Iron)

≥330

≥8

GB/T 9440, GB 15831

ZG230-450 (Cast Steel)

≥450

≥5

GB/T 11352, GB 15831

Export products can be manufactured to BS 1139 (British), EN 74 (European), or ASTM A536 (US) standards, with equivalent materials available.

Surface Finishes

Finish

Features

Application

Bare (with anti-rust oil)

Lowest cost, requires regular maintenance

Short-term use or indoor environment

Electro-galvanized

Uniform coating, bright appearance

Mild corrosion protection, indoor use

Hot-dip Galvanized

Zinc coating ≥40μm, excellent corrosion resistance

Outdoor projects, coastal areas

Painted (various colours)

Custom colours, added corrosion protection

Projects with colour-coding requirements

Key Advantages

Advantage

Description

Secure Connection

Rational design, uniform clamping force, stable anti-slip performance

Reliable Material

High-quality malleable iron or cast steel, strength meets construction requirements

Precise Dimensions

Accurate casting moulds, tight fit with steel tubes, no loosening

Durable Bolts

High-strength bolts with good anti-loosening properties, reusable

Multiple Anti-corrosion Options

Various surface treatments to suit different environments

Standard Compliant

Products passed GB 15831; also available to international standards

Bulk Supply

Ample stock to meet large-scale project needs

Packaging

Packaging Method

Description

Woven Bags

25~50 pieces per bag, lined with moisture-proof paper

Ton Bags

Approx. 500~1000 pieces/bag, suitable for bulk transport

Carton Boxes

Small batch or retail packaging for easy handling

Bundled

Stranded with wire and wrapped with waterproof fabric

supplies a full range of right-angle couplers in malleable iron or cast steel, with electro-galvanized, hot-dip galvanized, or painted finishes, compliant with GB 15831 and international standards, and supports export packaging. For inquiries and quotations, please contact us

Product Show

Right-angle couplers


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