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Surface-mounted jimmy-proof deadbolt with polished brass rim and bronze body, single cylinder, flat strike

Progressive Hardware Co., Inc.

Progressive Hardware Co., Inc. 1776-3 Grade 1 Jimmy Proof Deadbolt Single Cylinder Lock Set Polished Brass US3

SKU CH-BB5J-A9SD6 MPN 1776-3

Grade 1 single-cylinder deadbolt with jimmy-proof design and flat strike for high-security door protection

  • Grade1
  • Lock keyingKeyed Different
  • Strike typeFlat
  • Surface finishAround Body Polished Brass US3 Body itself Bronze
  • Product typeJimmy Proof Deadlock Deadbolt Single Cylinder
  • Grade 1 rating confirms highest residential security standard
  • Jimmy-proof design blocks tampering even if outer cylinder is compromised
  • Solid bronze alloy construction delivers lasting strength and corrosion resistance
  • Polished brass exterior with bronze body combines classic appearance with durable core
  • Single-cylinder deadbolt with flat strike simplifies installation on standard door frames

Grade 1 Jimmy Proof Deadbolt

This Progressive Hardware 1776-3 is a Grade 1 single cylinder deadlock designed for residential and light commercial doors. The jimmy proof construction resists forced entry by shielding the bolt mechanism from external manipulation. It suits owners who need a high security surface mounted lock with a polished brass exterior finish.

Sustained attack resistance

The solid high strength bronze alloy body and hardened drill point screws maintain integrity during prolonged physical attacks. A recessed cylinder collar protects the 5 pin cylinder from drilling and picking attempts. The Shutter Guard feature prevents tampering even if the outer cylinder is compromised, keeping the bolt engaged under continuous abuse.

Bronze alloy construction and flat strike

The lock body is cast from solid bronze with a polished brass US3 finish around the visible surfaces for corrosion resistance and appearance. A flat strike plate is included for standard door frame preparation. The single cylinder operation allows keyed entry from outside and thumbturn release inside, while the Grade 1 rating confirms durability through repeated daily cycles.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $82.99
Pricier than about 61% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameProgressive Hardware Co., Inc.
Model name1776-3
Product typeJimmy Proof Deadlock Deadbolt Single Cylinder
Size & build
Surface finishAround Body Polished Brass US3 Body itself Bronze
More details
Grade1
Lock keyingKeyed Different
Strike typeFlat

Questions about this item

How much heat or noise does the 1776-3 Grade 1 deadbolt generate during all-day use?

The mechanical lock produces no heat and no audible noise because it has no motor, electronics, or moving parts that run continuously.

What door preparation must already exist for the 1776-3 single-cylinder deadbolt to install and operate?

A standard cylindrical bore for the lock body, a matching bore for the flat strike on the frame, and a 5-pin keyway cut to the supplied key are required.

Will the 1776-3 flat-strike deadbolt align with an older mortise-style strike plate already on the frame?

No, the included strike is flat; a mortise strike has a different shape and depth, so the old plate must be replaced or the frame re-mortised.

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