‘O’ RING SEAL 11 X ID7.5 X 1.75 (BS011)VR/C850/1000/1200/1250/2200 THUMB SCREW

O Ring Seal 11 x ID7.5 x 1.75 BS011 Thumb Screw | Muir AU

The Muir O Ring Seal 11 x ID7.5 x 1.75 (BS011) is a genuine factory replacement designed to suit the thumb screw on VR/VRC 850, 1000, 1200, 1250, and 2200 series vertical windlasses. This precision-moulded seal forms a watertight barrier between the thumb screw and windlass body, protecting internal components from saltwater intrusion, moisture, and contaminants.

Built for Marine Reliability

Manufactured to the BS011 international standard with precise dimensions of 11mm OD x 7.5mm ID x 1.75mm cross-section, this seal delivers a perfect fit and reliable sealing performance. The premium elastomer construction resists compression set, UV degradation, and chemical exposure, ensuring long-lasting protection in harsh marine conditions.

Key Features

• Genuine Muir replacement seal for thumb screw applications
• Suits VR/C 850, 1000, 1200, 1250 and 2200 windlasses
• Precision dimensions: 11mm OD x 7.5mm ID x 1.75mm
• BS011 international standard sizing
• Premium marine-grade elastomer construction
• Excellent compression and corrosion resistance

Why Choose Genuine Muir Parts?

Choosing the authentic Muir O Ring Seal ensures perfect tolerances, reliable sealing, and long-term protection of your windlass internals. Aftermarket seals often use inferior materials that fail quickly, allowing water ingress and causing expensive damage. Trust genuine Muir parts for dependable performance.

Order your replacement seal today from Muir Australia — trusted marine engineering since 1968.