When should I use a cranked surface bolt instead of a straight bolt?

Choose a cranked bolt when a straight bolt won’t meet the keep due to an offset frame, moulding, or door stop. The cranked shape bridges the gap to improve alignment and closure.

Are polished chrome cranked surface bolts suitable for internal doors?

Yes. They’re commonly used on internal doors, stable doors, cupboards, and cabinets where you want a neat, durable bolt with a modern polished chrome finish.

What sizes do cranked surface bolts come in?

Many options are available in typical sizes from around 100mm (4 inch) to 200mm (8 inch). Always check the throw, fixing positions, and clearance against your door/frame before ordering.

Do cranked surface bolts require morticing?

Usually not. Most are surface-mounted, making them quicker to fit than recessed bolts. Correct alignment to the keep/strike is the key for a smooth, secure action.

Polished Chrome Cranked Surface Bolts

Q: What is a cranked (necked) surface bolt?

A cranked or necked surface bolt has an offset neck so the bolt throw can line up with the keep/strike even when the door edge and frame are not flush. It’s commonly used on recessed frames, doors with stops, or traditional joinery.

Cranked (Necked) Surface Bolts in a Polished Chrome Finish

Secure doors and windows neatly with our polished chrome cranked surface bolts (also called necked surface bolts or cranked barrel bolts). The offset “cranked” neck makes these ideal for inward or outward opening doors where the frame, stop, or moulding means a standard straight bolt won’t line up cleanly.

Supplied by Trade Door Handles, trusted UK supplier of architectural ironmongery since 1976, with nationwide next-day delivery.

Why choose a cranked surface bolt?

A cranked (necked) design lets the bolt throw meet the keep/strike even when the door edge and frame are not flush. That makes these bolts a smart choice for traditional joinery, recessed frames, and offset door stops—helping you achieve a tight, reliable closure without awkward spacing or packing.

Where they’re commonly used

These polished chrome surface bolts suit a wide range of applications, including stable doors, internal doors, cupboards, cabinets, and selected window installations. They’re often chosen when you need a secure secondary latch point with a clean, modern finish.

Polished chrome: modern look, practical performance

The mirror-like polished chrome finish is popular for contemporary interiors and refurbishment projects, pairing well with chrome door furniture and bright modern hardware. It also offers good day-to-day durability for typical domestic use, while keeping the installation looking crisp and professional.

Sizes and fitting notes

Many cranked bolts in this range are available in common sizes from around 100mm (4") to 200mm (8"). As surface-mounted bolts, they’re generally straightforward to fit and don’t require morticing—ideal for quick upgrades and replacements. For best results, align the bolt throw to the keep/strike and check clearance before fixing.