Open turnbuckle | jaw/jaw | A4 | M8021
Stainless steel A4 open-body jaw/jaw turnbuckle (rigging screw) is intended for use in corrosive and marine environments. The product is used where stepless adjustment of length and controlled tensioning of wire rope or stays is required. The design allows for precise fine-tuning of tension and length without dismantling the connection. It is suitable for installations where high corrosion resistance, reliable function, and long service life are critical.
APPLICATION AREA
The product is used in marine rigging, wire rope systems, railing installations, building constructions, and outdoor environments. It is intended for applications where adjustable wire tension, re-tensioning, and precise length adjustment are required, for example in wire railings, guy wires, antenna masts, and load-bearing wire constructions. The material provides resistance to saltwater, moisture, and chemically aggressive environments.
TECHNICAL SPECIFICATIONS
Product type: Fitting
Product family: Turnbuckle
Material class: A4
Strength class: Not specified
Standard: Not specified
Thread dimension: M5–M20
Design: Jaw/jaw
Surface finish: Bright
Environment: Marine
Delivery unit: Piece
FREQUENTLY ASKED QUESTIONS (FAQ)
What is a turnbuckle and how is it used?
A turnbuckle (also called a rigging screw) is used to re-tension and fine-tune the load in wires, chains, and steel rope. It consists of a central body with opposing threads (right-hand and left-hand threads) that pull the end fittings towards each other when the body is rotated.
What does it mean that the turnbuckle is made of acid-proof stainless steel A4?
Acid-proof stainless steel in quality A4 (equivalent to AISI 316 / 1.4401) contains molybdenum, which provides exceptionally good resistance to corrosion. This makes the turnbuckle suitable for use in demanding environments such as marine environments, coastal areas with salt spray, pool areas, and the chemical industry.
How do I choose the right size and end fitting for the turnbuckle?
The choice of size is governed by the wire diameter and the tensile load the turnbuckle needs to withstand. Regarding end fittings, you choose eye for permanent or locked attachments, hook for quick and easy detachment, or jaw for direct fastenings to plates, eyelets, and clevis pins.