UNION C-Series 3J60 Horizontal Detainer Sashlock

The UNION C-Series 3J60 Horizontal Detainer Sashlock (formerly manufactured under the renowned Chubb brand) is a high-security, UK-manufactured mortice lock. Designed primarily for timber doors up to 50mm thick, this horizontal sashlock is the ideal choice when fitting traditional mortice door knobs, providing ample clearance to prevent scraped knuckles.

Featuring a robust 5-detainer mechanism, the 3J60 offers up to 25,000 key differs, delivering a significantly higher level of security and pick-resistance than standard lever locks. The 14mm deadbolt is reinforced with hardened steel rollers to defend against saw attacks, while the latchbolt is easily operated by a handle from either side.

This non-handed lock is fully reversible, making it suitable for both left and right-handed doors opening inwards or outwards. It is also EN1634-1 approved for use on 60-minute timber fire doors and comes backed by a 10-year manufacturer's guarantee. For added convenience, it can be keyed alike or master keyed alongside other detainer locks by our in-house locksmith team.

Technical Specifications

• Brand: UNION C-Series (formerly Chubb)
• Mechanism: 5 Detainer
• Case Depth: 165mm
• Backset: 83mm (keyhole), 150mm (follower)
• Case Height: 98mm
• Centres: 67mm
• Forend Dimensions: 143mm (L) x 25mm (W)
• Finish: Silver Enamelled
• Deadbolt Throw: 14mm
• Fire Rating: EN1634-1 certified for 60-minute timber fire doors
• Keying: Keyed to differ (supplied with 2 keys as standard)
• Weight: 1.15kg

Key Features

• Chubb Heritage: Manufactured in the UK, continuing the trusted legacy of the classic Chubb C-Series.
• Horizontal Design: Ideal for use with mortice knobs, offering a generous backset to prevent hand clearance issues.
• Enhanced Security: 5-detainer mechanism provides up to 25,000 differs with anti-pick, anti-saw, and force-resistant features.
• Saw Protection: Deadbolt features hardened steel rollers to resist hacksaw attacks.
• Non-Handed: Fully reversible latchbolt suitable for left or right-handed doors.
• Versatile Keying: Can be keyed alike or master keyed with other detainer mortice locks in-house.
• 10-Year Guarantee: Backed by a decade-long manufacturer's warranty for peace of mind.