Sargent Deadbolt Installation Nationwide

Sargent Deadbolt Installation: The Florida Owner’s Guide

Sargent deadbolt installation in Florida typically runs $195-$385 for a standard single-cylinder replacement, including the lockset, labor, and door prep, with same-day service available across our service area. We stock Sargent 4800, 4870, and 4900 series deadbolts on every truck, along with the proprietary 1-3/8″ backset extensions Florida’s older block-and-stucco homes often need. Most owners discover the deadbolt is failing when the thumbturn spins without engaging the bolt, the key sticks in humid morning air, or the strike plate no longer lines up after years of door-frame settling.

Call (844) 956-4715

Which Sargent Models This Applies To

Sargent deadbolts span several series, and matching the right one matters more than with most brands because Sargent uses a unique cam profile and backset geometry that doesn’t interchange with Schlage or Kwikset.

Look for these identifiers:

• 4800 Series: Light commercial / heavy residential, ANSI Grade 2. Most common in Florida homes built 1995-2010. Part number stamped on the latch face: “4800” plus finish code.
• 4870 Series: Single-cylinder with hardened steel bolt. The “70” denotes the 1″ throw; earlier 4800 variants had 3/4″. Check your edge bore depth before ordering.
• 4900 Series: ANSI Grade 1, the step-up for commercial or high-security residential. Uses a larger 2-1/8″ cross bore; retrofitting into a 1-1/2″ hole means door prep work.

The gotcha we see weekly: Sargent’s 4800 and 4870 look identical from the exterior but use different tailpiece lengths. Measure from the mounting plate to the cam tip, or call us with the door thickness and we’ll match it before we roll. We carry both OEM Sargent and quality aftermarket equivalents keyed to match your existing hardware. Aftermarket saves roughly $40-$60 on the parts bill and carries the same 90-Day Done Right Promise.

Strongbox Lock & Safe Co. of Florida is an independent service provider, not affiliated with Sargent.

Signs Your Sargent Deadbolt Installation Is Failing

• The thumbturn spins freely but the bolt won’t retract. The tailpiece has sheared or the cam driver has worn smooth. This happens faster in Florida’s coastal zones where salt air corrodes the zinc-alloy tailpiece. We replace with brass or stainless internals on rebuilds.
• The key works in cool morning air but sticks by afternoon. Humidity swells the door jamb, misaligning the strike. It’s not the lock, it’s the frame. We check plumb and shim the strike before declaring the deadbolt itself failed.
• The bolt extends but won’t seat fully in the strike plate. Either the strike has wallowed out from repeated misalignment, or the bolt face is damaged from forcing it closed. Florida’s concrete-slab settling pulls frames out of square over fifteen to twenty years.
• The exterior cylinder pulls away from the door when you turn the key. The mounting screws have stripped the door’s cross bore, or the rose bushing has cracked. Sargent’s through-bolt design is sturdier than most, but particle-core doors still crush around the hardware.
• You need to jiggle the key to find the sweet spot. Worn pin chambers in the cylinder, usually from years of sandy grit working into the keyway. Beach-area homes see this at eight to twelve years instead of the typical fifteen.

Replacement Cost & What’s Included

What drives the range: finish grade (satin chrome vs. oil-rubbed bronze), whether the door needs re-boring, and if we’re rekeying to match a master key system. The price we quote on the phone is the price on the invoice. Every installation carries our 90-Day Done Right Promise in writing. Seniors and veterans receive a permanent 5% discount.

DIY or Call Us?

There’s a safe middle ground here. You can verify the backset (measure from door edge to center of cross bore: 2-3/8″ or 2-3/4″), check that the door edge is square, and confirm the strike plate screws bite into solid framing, not just trim. Photograph the existing lock’s part numbers and email them to us; we’ll confirm compatibility before scheduling.

Where DIY goes wrong: Sargent’s tailpiece orientation is handed (left vs. right door swing) and the cam clocking must align precisely with the latch mechanism. Off by thirty degrees and the lock functions until it doesn’t, usually at 10 PM. Worse, over-tightening the mounting screws on a hollow-core or particle-core door crushes the bore and ruins the door. We’ve replaced more doors from botched deadbolt installs than from break-ins.

We quote it flat before we roll, and we stand behind it when we’re done. Call (844) 956-4715 and we’ll talk through what you’re seeing.

FAQs