Best 8T37K-STK Interchangeable Core Single Cylinder Deadbolt

Usually Ships: 1-2 Business Days
  • Heavy Duty, ANSI/BHMA Grade-1
  • Single Cylinder x Inside Turn
  • Core not included (sold separately)

Available Options:


Best 8T37K-STK T Series Tubular Deadbolt, 2-3/4″ Backset, 7-Pin Housing; Accepts all BEST Cores, Single-Keyed x Turnknob, Standard Deadbolt

The BEST 8T is a Grade 1 deadbolt built to fits standard door preps. The 8T is often paired with a cylindrical lock in commercial office spaces, residential applications and other spaces where there is a greater need for security and, more specifically, a deadbolt that is more resistant to brute force attack.

Premium materials – T Series deadbolts are made of top quality materials that provide corrosion resistance and durability.
Enhanced security – Features a solid stainless steel bolt with full 1” throw in each T Series deadbolt for extra protection.
Simple retrofit – T Series deadbolts accept SFIC cores, making rekeying easy.
Flexible integration – In addition to compatibility with other manufacturer’s cores, T Series deadbolts easily integrate into existing SFIC masterkey systems.

Deadbolt Operated by: Turning the key in the outside cylinder – Turning the inside turn lever.

ANSI Function: E2151, E2152 (181K)

Core Housing: 7 pin housing accepts all Best cores



605 Bright Brass, 606 Satin Brass, 612 Satin Bronze, 613 Oil Rubbed Bronze, 625 Bright Chrome, 626 Satin Chrome

Deadbolt Type

Single Cylinder

ANSI Function


ANSI/BHMA Standard

ANSI/BHMA A156.2 Grade 1

ANSI Grade

ANSI Grade 1


Heavy Duty


Small Format Interchangeable Core (SFIC) Cylinder (Less Core)


1" throw bolt, 1-1/8" x 2-1/4" square corner face plate




1-1/8” x 2-3/4“ square corner

Fire Rating

UL Listed for “A” Label 3 Hour Fire Doors

ADA Compliance

Meets ADA requirements – A117.1 Accessibility Code

Door Thickness


Buy American Act Compliance

Meets Buy Amercian Act – Made in USA

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Best 8T37K-STK Interchangeable Core Single Cylinder Deadbolt