
SCREW CSK SL MT 316 12MM X 25MM
Screw CSK SL MT 316 12mm x 25mm | Genuine Marine | Muir AU
The Muir Screw CSK SL MT 316 12mm x 25mm is a genuine factory replacement designed for VC2500 capstans and Muir windlass assemblies. Precision-machined from premium 316 marine-grade stainless steel, this metric countersunk slot-head machine screw provides secure fastening for components requiring a flush finish on deck or housing surfaces.
Built for Marine Conditions
The Screw CSK SL MT 316 12mm x 25mm features a countersunk (CSK) head with slot drive (SL) and metric thread (MT) — sized at 12mm diameter x 25mm length for exact OEM compatibility. The 316 stainless steel construction provides outstanding corrosion resistance against saltwater, UV, and chloride exposure, far surpassing standard 304 grade in harsh marine environments.
Key Features
- Genuine Muir replacement screw for VC2500 capstans
- Countersunk head for flush mounting
- Slot drive for traditional screwdriver fitment
- Metric thread, 12mm diameter x 25mm length
- Premium 316 marine-grade stainless steel construction
- Superior corrosion resistance in saltwater environments
Why Choose Genuine Muir Parts?
Choosing the authentic Screw CSK SL MT 316 12mm x 25mm ensures perfect thread engagement, reliable load capacity, and long-term durability. Aftermarket screws often use inferior steel grades that corrode, strip, or shear under load — risking damage to your capstan or windlass assembly. Trust genuine Muir parts for dependable performance.
Order your replacement screw today from Muir Australia — trusted marine engineering since 1968.
Part number: S331027
Fits: VC 2500 exploded view · VC 3500 exploded view
Prices aren’t shown online. Send us the part number and your windlass model and serial number and we’ll confirm fit, price and availability.


