Ronstan RF621 4mm Pin Long D Shackle – 316 Stainless Marine Fitting

The Ronstan RF621 Long D Shackle is a versatile and reliable marine fitting featuring a 4mm pin and an elongated D-shape design, ideal for tight rigging spaces where length and alignment matter. Constructed from marine-grade 316 stainless steel, this shackle offers excellent corrosion resistance and strength in harsh saltwater environments.

Its long D profile allows for more flexibility in attaching hardware, and the precision-machined pin provides secure, load-bearing functionality. A staple in rigging setups for yachts, small boats, and general marine use.

Specifications:

• Pin Diameter: 4.0mm

• Internal Length: 30.0mm

• Internal Width: 10.0mm

• Material: 316 stainless steel

• Breaking Load: 650kg

• Working Load Limit: 325kg

• Design: Long D shape for increased versatility

• Applications: Marine rigging, sailing hardware, deck fittings, block attachments

Ideal for sailors and riggers who require a compact, high-strength solution that performs reliably in all marine conditions. Available now at Barton Marine NZ.