Kwikset 83343 158/780/816/980 RCAL Deadbolt, Round Corner Adjustable Latch, 2-3/8" or 2-3/4" Backset

It does both. The 83343 is an adjustable deadbolt latch that sets to either a 2-3/8 inch or a 2-3/4 inch backset, so one part covers the two standard residential and light commercial bore spacings. Set it to match the distance from the door edge to the center of the cross bore before you install the bolt.

The 83343 is the round corner adjustable latch for the Kwikset 158, 780, 816 and 980 deadbolts. If you are rebuilding or re-handing one of those deadbolts and the bolt assembly is worn or the wrong backset, this is the bolt that goes with it.

No. The 83343 has a round corner faceplate, so it drops into a door edge mortise with radiused corners. A square corner mortise will leave gaps at the corners unless you chisel it out. For a square corner prep, look at a square corner deadbolt latch such as the Schlage 12-630 for B600/700/800 Series deadbolts.

Deadbolt. The 83343 is a deadbolt bolt assembly, meaning it throws only when the thumbturn or key is operated and it has no spring-return bevel. It will not work in a knob or lever prep. For a knob or lever latch you need a regular spring latch, like the Deltana G1RLE238 entry latch at 2-3/8 inch backset or the G1RLE275 at 2-3/4.

The nearest match is the Schlage Commercial 12-289 for B500 Series deadbolts. Like the Kwikset 83343, it is a deadbolt latch that adjusts between 2-3/8 inch and 2-3/4 inch backset, and it uses a round corner face - the 12-289 face is 1 inch by 2-1/4 inch with a 1/4 inch round corner. The Kwikset 83343 is the deadbolt latch for Kwikset 158, 780, 816 and 980 deadbolts, so the two are brand-specific to their own deadbolt bodies; use the Schlage part only when the deadbolt in the door is a Schlage B500.

The Kwikset 83343 is a deadbolt latch, so it throws and retracts only with the thumbturn or key cylinder and will not work behind a knob or lever. For a keyed knob or lever opening, the Deltana G1RLE238 and G1RLE275 are Grade 1 entry latches at 2-3/8 inch and 2-3/4 inch backset. For a non-keyed door, the Deltana G1RLP238 and G1RLP275 are Grade 1 passage/privacy latches in the same two backsets. The Schlage 16-480 is a deadlatch for S200 Series that adjusts across both backsets with a 1 inch by 2-1/4 inch square corner face.

The Kwikset 83343 is an adjustable 2-3/8 inch or 2-3/4 inch backset latch, which needs a standard door stile depth; a narrow sidelite frame generally will not take that backset. For that opening, the Accentra YSSL10 Security SideLite auxiliary latch is purpose-built, fits 1-3/4 inch thick doors, is fire rated, and includes an ADA compliant thumbturn - useful where the sidelite has to meet accessibility requirements.

Yes, provided the doors are round corner prepped. The 83343 covers the 158, 780, 816 and 980 deadbolts and adjusts between 2-3/8 and 2-3/4 inch backset, so a single part number handles mixed bores across a building. Stock it in the finish that matches your deadbolt trim and you can rebuild any of those units without a site survey first.

The 83343 is the bolt assembly itself, the adjustable round corner latch for Kwikset 158, 780, 816 and 980 deadbolts. If your existing strike in the frame is sound, you reuse it. Order a strike separately if the frame side is damaged or you are changing the bolt to a different backset that shifts the door edge hardware.

Two close alternatives both adjust between 2-3/8 and 2-3/4 inch like the 83343 does. The Schlage 12-289 is for B500 Series deadbolts, with a 1 inch by 2-1/4 inch face and a 1/4 inch round corner, so it is the nearest round corner match. The Schlage 16-228 fits S200 and CS210 Series interconnected locks and has a 1-1/8 inch by 2-1/4 inch square corner face. Match the latch to the lock brand and series it came out of, since deadbolt tailpiece and bolt hub engagement are not interchangeable across makers.

The Deltana regular latches are Grade 1: G1RLE238 and G1RLE275 in entry function, G1RLP238 and G1RLP275 in passage/privacy. The Dexter deadlatch for the C1000 Series is Grade 2. The Kwikset 83343 is a commercial deadbolt latch for Kwikset 158, 780, 816 and 980 deadbolts, where the grade is carried by the deadbolt body it serves rather than the latch component. If the submittal calls out a graded latch specifically, the Deltana or Dexter parts are the ones to quote.

Yes. The Kwikset 83343 is a replacement latch only - it serves an existing Kwikset 158, 780, 816 or 980 deadbolt and adds no access control of its own. If you want to change how the door is operated, the Lockey M230 is a mechanical keyless digital combination lock with a deadlocking spring latch and an adjustable backset, and it fits doors from 1-1/8 inch to 2 inch thick. That replaces the lock rather than servicing it, so plan on new door prep verification.

No. The Dexter part is a Grade 2 deadlatch made for the Dexter C1000 Series cylindrical locks, so it is driven by a knob or lever chassis. The Kwikset 83343 is a deadbolt latch with a round corner face, adjustable to 2-3/8 inch or 2-3/4 inch backset, serving Kwikset 158, 780, 816 and 980 deadbolts. The two sit in different bores and are not interchangeable in either direction.

Not with the Kwikset 83343. It is an adjustable latch that covers both 2-3/8 inch and 2-3/4 inch backsets, so one part number stocks both door preps for Kwikset 158, 780, 816 and 980 deadbolts, in Venetian Bronze or Polished Chrome. Fixed-backset alternatives force two SKUs: the Deltana entry latches, for example, split into G1RLE238 at 2-3/8 inch and G1RLE275 at 2-3/4 inch.

It is classified as a commercial part. That means it is intended for use on the Kwikset 158, 780, 816 and 980 deadbolts in commercial openings, not just residential entry doors. If you are working an opening that requires a fire rated latch, that is a separate specification and this one is not the part to assume it on.