Ronstan RF639 5/16" Pin Wide D Shackle – 316 Stainless Marine Fitting

The Ronstan RF639 Wide D Shackle with a 5/16" (7.9mm) pin is a high-quality, corrosion-resistant shackle designed for maximum versatility in marine rigging. Manufactured from 316-grade stainless steel, it offers excellent resistance to saltwater corrosion and delivers reliable strength for a wide range of sailing and boating applications.

The wide D-shaped body provides greater spacing between attachment points, ideal for thicker hardware, dual line connections, or deck fittings where standard shackles are too narrow. Its polished finish, secure pin fit, and heavy-duty rating make it a dependable choice for demanding marine environments.

Specifications:

• Pin Diameter: 7.9mm (5/16")

• Internal Length: 27.0mm

• Internal Width: 22.0mm

• Material: 316 stainless steel

• Breaking Load: 1600kg

• Working Load Limit: 800kg

• Design: Wide D shape for increased clearance

• Applications: Sailing rigging, dual line connections, deck hardware, marine use

Perfect for yacht owners and riggers who need a broader shackle profile without sacrificing strength. Available now from Barton Marine NZ, official stockist of Ronstan marine fittings.