EN74 Drop Forged Swivel Coupler – British Type
EN74 Drop Forged Swivel Coupler – British Type
Drop Forged Double Coupler BS1139 Drop Forged Double Coupler BS1139 Galvanized
Drop Forged Double Coupler BS1139 Packing
  1. EN74 Drop Forged Swivel Coupler – British Type
  2. EN74 Drop Forged Swivel Coupler – British Type
  3. Drop Forged Double Coupler BS1139 Drop Forged Double Coupler BS1139 Galvanized
  4. Drop Forged Double Coupler BS1139 Packing

EN74 Drop Forged Swivel Coupler – British Type (Model YH170S / YH170BS)

Items: Swivel Coupler

Size : 48.3*48.3

Type: YH170S/YH170BS

Standard: EN74

Surface: EP HDG Paint

Suitable For: Britain, Middle-East

Contact us today to get a quote or to discuss your custom requirements. We supply reliable scaffolding parts for projects of any scale.

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Overview The Bonin Type YH170S / YH170BS is a premium Swivel Coupler designed to connect two 48.3mm scaffold tubes at any angle. Unlike standard couplers, the British Type YH170 series features a reinforced body and a heavy-duty rivet pin, ensuring superior rotational smoothness and load-bearing capacity for complex diagonal bracing (cross-bracing).

Key Features for Targeted Markets:

  • Strict EN74 Compliance (For Britain): In the UK market, safety regulations are stringent. The YH170S series is manufactured to meet or exceed EN 74-1 Class A standards. The robust design ensures that even under heavy wind loads or dynamic stress, the coupler maintains a rigid grip, making it the preferred choice for major British contractors.

  • Extreme Durability (For Middle East): Construction projects in the Middle East face extreme heat, sandstorms, and high salinity. We recommend the YH170BS in Hot Dip Galvanized (HDG) finish. With a thick zinc coating, it offers exceptional resistance to corrosion and seizing, significantly extending the product’s lifespan in desert or coastal oil & gas projects.

  • Versatile Diagonal Bracing: The 360-degree rotational capability allows scaffolding engineers to design complex, non-rectangular structures, such as circular tanks, arched facades, or reinforcing standard towers with diagonal struts.

Model Variance (YH170S vs YH170BS): Available in standard nut (21mm) or flanged nut (22/23mm) variations to suit specific spanner sizes used in different regions.

FAQ

Q: What is the main advantage of the “British Type” YH170S over standard swivel couplers?

A: The “British Type” designation typically refers to a heavier, more robust design with a larger contact area and higher-grade bolts. It is engineered to handle the rigorous safety factors required by UK NASC guidelines and EN74 standards, offering higher slip resistance than generic lightweight couplers.

Q: Can YH170S swivel couplers be used for load-bearing ledgers?

A: Swivel couplers are primarily designed for bracing and auxiliary connections. For main load-bearing right-angle connections (ledgers to standards), you must use the YH170S Double Coupler. Always consult a structural engineer for load calculations.

Q: How do you ensure the center pin doesn’t fail?

A: The central rivet of the YH170S/BS is made from high-tensile steel and undergoes a specialized riveting process. We conduct batch destruction tests to ensure the rivet shear strength far exceeds the EN74 requirement of failure force.

Complete your EN74 system: Pair this Swivel Coupler with our YH170 Double Coupler.

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