Choosing a Locker Lock: Hasplock Swivel Bolt or Fixed Cam Lock?

March 31, 2026

A swivel bolt hasplock requires an external padlock and delegates key management to the user, whilst a fixed cylinder cam lock integrates the locking mechanism and key directly into the door front.

The System Question in Locker Planning

When outfitting changing rooms, staff quarters, or secure compartments, the question of the right locking system inevitably arises. A mechanical cabinet lock forms the backbone of facility security. The choice between a swivel bolt for padlocks and a permanently integrated cylinder cam lock fundamentally determines the administrative workload, maintenance, and overall system flexibility.

Mechanically, both systems are based on a cam lock mechanism, in which a rear-mounted cam latches behind the frame or a striker plate via a rotational movement. The crucial difference lies in how rotation is blocked. This article analyses the technical properties of both variants and provides decision-making criteria for fitters and commercial planners selecting furniture locks for cupboard and locker systems.

What Is a Swivel Bolt Hasplock for Padlocks?

A swivel bolt catch (often referred to as a padlock hasp fitting) is a mechanical latch consisting of a turnable knob and a rear-mounted locking cam.

The user manually turns the bolt into the closed position. This aligns two eyelets – one on the fixed housing and one on the rotating cylinder. The shackle of a standard padlock is inserted through this opening. Once the padlock is locked, rotation of the knob is mechanically prevented. The locker can no longer be opened.

The system is typically manufactured from robust die-cast zinc or glass-fibre reinforced plastic. Compatibility is defined by the maximum shackle diameter of the padlock, which typically ranges between 5 mm and 8 mm.

What Is a Fixed Cam Lock?

A fixed cylinder cam lock (in this design, usually a lever cylinder lock) integrates the lock cylinder directly into the housing body. It requires no external padlock.

Inside the cylinder core, spring-loaded wafers or pins (wafer tumbler or pin tumbler) are located. Inserting the matching key aligns these elements in a single row, permitting rotation. The key simultaneously serves as the handle to rotate the rear cam, typically by 90° or 180°.

This design is not only found on lockers; as a classic furniture cylinder lock, it is also widely used on office pedestals or as a letterbox lock.

Technical Differences in Detail

Comparing both systems highlights distinct differences in everyday handling and technical administration. A cylinder lock operates as a permanently installed tool, whereas a swivel bolt acts like a universal receiver that is only immobilised when an external attachment is secured.

Key Management: With a cylinder lock, the facility operator must issue keys, manage them, and source replacements when lost. Maintaining a key log is often necessary. With a swivel bolt, the user provides their own padlock. The operator manages no keys.
Handling Lost Keys: If a user loses a key to a cylinder lock, the cylinder usually has to be picked or drilled out and replaced completely. With a swivel bolt hasp, only the shackle of the padlock is cut with bolt cutters. The locker fitting remains intact and immediately reusable.
Master Key Suite Capability: Cylinder locks can be integrated into master key suites. A site manager can open all compartments using a single master key, for instance for maintenance or emergency access. This is not possible with swivel bolts using individual padlocks (unless the bolt itself features a master key function, which is technically complex).
Installation and Hole Pattern: Both lock types require a cutout or hole in the door front. In metal lockers, a hole pattern of 19 mm x 16 mm (double-D punching to prevent rotation) is standard. In timber or MDF doors, a round 19 mm diameter hole is typically drilled. Fixing is achieved using a securing nut on the threaded body or a retaining clip.
Material Thickness: Cylinder locks and swivel bolts have a defined cylinder barrel length. For sheet steel doors, short cylinders (e.g. 20 mm) suffice; for melamine-faced chipboard (typically 19 mm thick), longer threaded bodies are required.

Which Lock Is Best for Which Application?

The decision primarily depends on the user demographic. High-turnover users require different systems compared to permanently assigned storage compartments.

Applications for Swivel Bolt Hasps (Padlocks)

This system is the practical solution for environments with high user turnover and anonymous visitors.

Gyms and Swimming Pools: Day guests bring their own padlock or purchase one at reception.
Schools and Universities: Students utilise a locker for an academic year, freeing the institution from the burden of key distribution.
Co-working Spaces: Temporary lockers for day-pass users.

Applications for Fixed Cylinder Cam Locks

When the lock is installed on cabinet doors in a fixed workplace environment, cylinder cam locks demonstrate their strengths.

Staff Lockers: Each employee receives an assigned locker and key.
Office Furniture: A drawer lock in a mobile pedestal or a furniture lock on a filing cabinet requires a clean, flush-fitting design without protruding padlocks.
Tall Cabinets: When securing large wardrobe-style units, a single cam is often insufficient to prevent the door from being levered open. In these cases, the cylinder is paired with a cabinet lock with locking rods (an espagnolette lock) that secures the door at the top and bottom.

Frequently Asked Questions (FAQ)

Can a cylinder lock be replaced with a swivel bolt later on?

Yes, replacement is usually straightforward provided the hole pattern (the door cutout) is identical. Most mechanical locker locks use standardised dimensions, such as a 19 mm borehole. Replacement simply requires unscrewing the rear retaining nut.

How do I measure the correct size for a new furniture lock?

Two measurements are essential: the diameter of the hole in the door (usually 19 mm) and the maximum material thickness of the door. The latter dictates the required thread length of the lock body. Additionally, check the crank (the offset bend) of the locking cam to ensure the cam latches securely behind the frame.

Are there lock alternatives for glass doors?

Yes, for display cases or glass-fronted cabinets, standard swivel bolts and conventional cylinder locks cannot be installed without drilling through the glass. In these situations, a glass showcase lock is used, which slides over the glass edge as a slip-on lock and is secured with a clamping screw.

What is a surface-mounted furniture lock?

A surface-mounted lock is not inserted through a round cutout in the front; instead, it is screwed entirely onto the inside surface of the door. Only the keyhole (framed by an escutcheon) remains visible from the outside. This design is commonly found on traditional timber furniture.