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Brass surface-mounted deadlock with twin interlocking bolts

WILSON SUPPLY

WILSON SUPPLY 6251B Brass Jimmy Proof Deadlock

SKU CH-X1S6-64SD4

A surface-mounted brass deadlock with twin interlocking bolts and a five-pin SE1 cylinder fits doors 1-3/8" to 2-3/8" thick and includes a flat strike keeper

  • Lock keyingKeyed Different
  • Strike typeFlat
  • Main functionJimmy Proof Deadbolt
  • Sold asBox
  • Product typeJimmy Proof Deadlock
  • Key featuresSurface Mounted
  • Jimmy proof design locks door to jamb against forced entry
  • Twin interlocking drop bolts reinforce the deadbolt for added strength
  • Five pin tumbler brass rim cylinder provides pick resistant operation
  • Die cast housing with brass finish resists corrosion and wear
  • Fits doors 1-3/8 to 2-3/8 thick and installs with a 1-1/4 inch hole

Wilson Supply 6251B Jimmy Proof Deadlock

This surface-mounted deadlock uses a die-cast housing with a brass finish to secure doors between 1-3/8" and 2-3/8" thick. A twin interlocking drop bolt engages the flat strike keeper to resist forced entry. The single-cylinder design operates via a 5-pin tumbler rim cylinder with an SE1 keyway. A tamper-resistant shutter guard adds further protection against manipulation.

Ideal for doors with glass panes near the lock

The single cylinder allows interior egress without a key while the exterior requires one, suiting entry doors where a thumbturn would be reachable through broken glass. Buyers needing a double-cylinder lock for higher security or a mortise-style installation should consider other hardware. The flat strike keeper is furnished, but non-standard jambs may require modification.

Handles standard residential door thicknesses

The lock accommodates the common 1-3/8" to 2-3/8" range using the supplied flat strike. It provides a mechanical barrier against jimmying through the interlocking bolt design. The unit does not support electronic access, smart home integration, or keyed-alike configurations across multiple units. Installation requires precise alignment of the surface-mounted body and strike.

How it compares

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

Price $36.99
Cheaper than about 58% of the 2,145 comparable items (median $55.99).

Specifications

Product
Product typeJimmy Proof Deadlock
Size & build
Main materialDie cast housing
More details
Lock keyingKeyed Different
Strike typeFlat
Main functionJimmy Proof Deadbolt

Questions about this item

What door thickness range does the 6251B deadlock fit?

The lock is designed for doors between 1-3/8" and 2-3/8" thick.

Can I keep my existing flat strike plate when installing this lock?

Yes, the deadlock is furnished with a flat strike keeper that matches the flat strike type.

How do I verify the twin interlocking drop bolts are engaging correctly after installation?

Close the door and turn the key; both bolts should extend fully into the strike keeper with a solid mechanical click.

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