If you’re putting in a door lock and need something that actually does the job right without fuss, this 40 mm 1C half pin cylinder in Satin Steel is exactly the sort of hardware that keeps things secure and straightforward. This is a high‑security lock cylinder built for one‑sided key access — meaning the key goes in only from the side you intend to control access from, and that’s it.

Here’s the thing — this isn’t some flimsy throwaway barrel. The satin steel finish gives you corrosion resistance and a clean finish that blends with most hardware, and the half pin design makes it ideal for a mortise lock setup on doors, gates, or exits where you don’t need a key on both sides.

Key Features:

• Satin Steel Finish - Looks good and stands up to daily wear and weather without rusting out.
• Half Pin Design - Key access only on one side, so you control entry without a keyway where you don’t want one.
• 40 mm Length - Perfect for standard mortise locks — fits without modifying the frame.
• High Security Construction - Built to replace older cylinders with a dependable locking action.
• Standard Pin Tumbler Mechanism - Uses spring‑loaded pins for reliable, familiar key operation.

Applications

This high security lock cylinder is mainly used in residential and light commercial doors where you want secure key control on one side only – think main entrance doors, service doors, garage access points, or utility rooms. It’s a straightforward swap‑in for existing mortise lock setups in wood, metal, or composite doors.

Why Choose This Model

In practice, this 40 mm half pin cylinder hits the sweet spot between simplicity and security. It fits most standard locks without wrestling with weird dimensions, and the satin steel finish isn’t just for looks — it means the barrel won’t corrode on you after a few months on an exterior door. What really stands out is how easy it is to install and match to existing hardware, especially when you’re repairing or upgrading locks without going full‑on smart or electronic.

Technical Specifications Explained

• Length (40 mm) - Ensures the cylinder sits flush and engages the mortise mechanism correctly.
• 1C Half Pin - One‑sided key access, so only one side of the door can be unlocked with a key.
• Finish: Satin Steel - Minimizes corrosion and blends with most door hardware trims.
• Pin Tumbler Internals - Classic locking method that’s easy to re‑key or match to existing key sets.
• Compatibility - Works with standard Euro profile mortise locks and most common door thicknesses.

Who Should Buy This

If you’re in the trades and need a reliable half cylinder lock to install during a door swap, retrofit, or lock upgrade, this is the sort of part that makes the job fast and painless. It’s great for locksmiths, builders, and DIYers who aren’t looking for fancy bells and whistles — just a solid, functional lock core that won’t cause callbacks. And because it’s a straightforward mechanical unit, you won’t have to deal with setups or batteries.

Don’t overthink it — when you need dependable security from a trusted mechanical cylinder that’s easy to fit and doesn’t cost an arm and a leg, this satin steel half pin cylinder gets you there.