Weslock Cylinder for 640 Series Locks

The Weslock cylinder for 640 Series locks is sold in three keyways: Weslock, Schlage, and Kwikset. Pick the one that matches the key system already running your building and the 640 lock keys alike with everything else on that keyway. That is the whole point of ordering the cylinder separately instead of a complete lock.

No. The cylinder is the keyed plug assembly out of the 640 Series lock and it is sold on its own, so a turnover or a lost key is a cylinder swap, not a new lockset. Order it in the finish that matches the lever you are keeping and in the keyway your other doors already use.

Neither. It is a key-in-lever cylinder built for the Weslock 640 Series residential lockset, so it will not go into a mortise lock body or the back of a rim exit device. For a rim exit device use a rim cylinder such as the Schlage 20-021 with a vertical tailpiece cam or the 20-022 with a horizontal cam. For a mortise lock body you want a mortise cylinder, for example the Corbin Russwin 1000 Series in 1-1/2 inch with an A02 straight cam, or the Detex MC65 in Schlage C keyway.

Order every cylinder on the same keyway and a locksmith can pin them to a common key system. The keyway is the constraint, not the finish: a Schlage keyway cylinder cannot be keyed with a Kwikset keyway one. If the rest of your doors are Schlage C, take the Schlage keyway version and the 640 doors fold into the same system.

Nothing in the Weslock 640 cylinder family fits an Adams Rite narrow stile deadlock. For an MS1847 deadlock or deadlatch, the Adams Rite 4024 cylinder pull mounts with a trim plate, and the Adams Rite 4025 is a five pin tumbler cylinder pull that mounts with through-screws. Both are built specifically for the MS1847 system. If the door is wood rather than aluminum narrow stile, the Adams Rite 4026 five pin tumbler cylinder pull is the one made for the 5017 wood door deadlock and deadlatch.

The Weslock 640 series cylinder is a replacement cylinder for Weslock 640 residential lever locks, offered in Weslock, Schlage and Kwikset keyways. It is not a mortise cylinder. For a mortise prep, the Adams Rite 4036 mortise cylinder is Grade 1 with five-pin security and a 1/2 inch minimum door thickness, and the Corbin Russwin 1000 series mortise cylinder is Grade 1 in a 1-1/2 inch length with an A02 straight cam. Which one you take depends on the cam the mortise lock body needs.

The Weslock 640 cylinder is brand-specific to Weslock 640 series lever locks, though it comes in Weslock, Schlage and Kwikset keyways so it can be brought onto an existing key system. If you are servicing a building with mixed lock brands, the Kaba Ilco 1539 series is a key-in-knob and lever universal cylinder, and the Kaba Ilco 1599 is a key-in-knob replacement cylinder. For Sargent knobs and levers specifically, Kaba Ilco offers the 1579. Those are the parts to look at when one cylinder needs to cover several lock makes rather than one series.

The Weslock 640 series cylinder is made for the 640 series lever lock, not for a deadbolt. For deadbolt cylinders, the Kaba Ilco 1549 is a key-in-deadbolt cylinder, and the Medeco 1012040 is a 6-pin lazy motion rim cylinder made for Kwikset single cylinder deadbolts. The Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts. If you are keying a lever and a deadbolt alike, order the 640 cylinder in the keyway that matches the deadbolt cylinder you choose.

No. Keyway and cylinder format are two different things. The Weslock 640 cylinder in Schlage keyway will accept a Schlage-cut key, but it is still a cylinder for Weslock 640 series lever locks. A Schlage commercial part like the 20-021 rim cylinder, or the Detex MC65 mortise cylinder with Schlage C keyway in 1-1/8 inch 6-pin, shares the keyway family but is a different body that fits a different lock. Match the keyway when you want one key to work both, and match the cylinder type to the lock it goes into.

Five finishes on the 640 Series cylinder: Oil Rubbed Dark Bronze, Antique Brass, Lifetime Brass, Black, and Satin Nickel. Every one of those is offered in all three keyways, so matching the trim on a door does not force you off the keyway your master system uses.

It is specified for the 640 Series lockset, not for a deadbolt. Deadbolt plugs use a different tailpiece and body length. For a key-in-deadbolt replacement, the Kaba Ilco 1549 Series is a deadbolt cylinder, and the Ilco 1539 Series covers key-in-knob and lever applications.

The 640 Series cylinder is a standard-keyway part in Weslock, Schlage, or Kwikset. If you need a restricted, patented key, that means a different cylinder rather than a finish change: Medeco builds retrofit plugs for residential hardware, including the 1012040 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts and the 1065140 5-pin retrofit for Arrow JL interconnected locks and Emtek handlesets. Match the retrofit to the lock you are actually putting it in.

The 640 Series is residential lever hardware and this cylinder is the service part for it, so it suits apartments, condos, and light interior openings. For an entry taking commercial traffic, buy at the Grade 1 level instead: the Adams Rite 4036 five-pin mortise cylinder is a Grade 1 part, as are the Corbin Russwin 1000 and 1070 Series mortise cylinders.

Confirm the series before ordering. This plug is cut for the 640 Series lockset, and cylinder body length and tailpiece differ between Weslock families, so a 640 cylinder is not a blanket Weslock part. The series is usually stamped on the lock chassis or the latch faceplate.

They sit in different parts of the door. The Weslock 640 series cylinder drops into the 640 series lever lock itself. A rim cylinder mounts through the door and drives a rim device behind it - the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam and the Schlage 20-022 is the same cylinder with a horizontal tailpiece cam, each supplied with two keys. The Corbin Russwin 3070 is a 6-pin rim cylinder housing with a 1-7/8 inch tailpiece. A rim cylinder will not seat in a 640 lever lock, and the 640 cylinder will not drive a rim device.

The Weslock 640 cylinder is a conventional replacement cylinder, so a rekey means pinning or changing the cylinder. Interchangeable core hardware is the alternative approach: the BEST 1C series standard 5-pin cylinder core and the BEST Peaks 1CB 150 series interchangeable core cylinder pull out with a control key, and the BEST 1CDF is a drill resistant patented interchangeable core in 7-pin brass. Schlage's 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam, and the 20-057-C is a full size interchangeable core in C keyway, 643E aged bronze. Going that route means changing the lock hardware, not just the cylinder.

The Weslock 640 cylinder is matched to Weslock 640 series lever locks. Emtek hardware takes its own parts: the Emtek CY4 cylinder is the brand's own replacement. On the aftermarket side, the Medeco 1065140 is a 5-pin retrofit cylinder for the Arrow JL interconnected lock and for Emtek handleset and deadbolt outside cylinders, and the Medeco 1065244 is a 5-pin rim lazy motion cylinder supplied with an Emtek tailpiece.

The Weslock 640 series cylinder serves Weslock 640 residential lever locks. On the commercial side, the Falcon A23161-05 G is a key in lever cylinder for the RU/T series, 6-pin in the G keyway, keyed different and supplied with two cut keys. The Corbin Russwin 1070 is a 1-1/4 inch 6-pin Grade 1 mortise housing with an A01 cloverleaf cam, and the Corbin Russwin 1080 is a 1-1/2 inch LFIC 6-pin mortise cylinder for Schlage L9000 mortise locks. Identify the lock body first, since each of these serves a specific one.

It is a conventional fixed cylinder, keyed by pinning the plug, so changing keys means pulling the lock apart or handing the cylinder to a locksmith. If you want core-swap rekeying on a property, that is a small-format or full-size interchangeable core system instead: BEST 1C Series 5-pin cores and the 1CB Peaks 150 Series core are SFIC parts, and Schlage 20-057 is a 6-pin FSIC rim cylinder. Those require lock bodies built to take a core, which the Weslock 640 is not.

A working cylinder such as the Weslock 640 series part is only needed where the opening is actually keyed. For a hole that needs to be filled without key function, the BEST 12E series dummy rim cylinder has a 1-5/32 inch diameter and provides the appearance without the mechanism. Note that it is a rim format dummy, so it suits a rim prep rather than a 640 series lever lock.