BEST 8K GRADE 1 CYLINDRICAL KEYED KNOB LOCK
The premium knob set for heavy-duty applications.
BEST’s 8K lock series delivers dependable security in high traffic areas. With knobs machined from brass or bronze bar stock, you’ll feel the weight of BEST’s solid construction and high-quality performance. Designed for strength and durability, but also for easy installation and use, BEST 8K knob sets are the leading heavy-duty choice.
The 8K is a Grade 1 heavy-duty cylindrical knob set. BEST 8K locks are not only designed to last and protect, they’re also simple to install, retrofit, rekey, and use. Premium workmanship and carefully designed components ensure that 8K locks perform—easily but reliably—over the long-term.
- High quality. External components are designed for premium aesthetics and security, while internal components are treated for corrosion resistance to ensure long product life.
- Proven reliability. Exceeds ANSI Grade 1 requirements for security and reliability. Keyed knob design and strong retractor springs provide better functionality throughout the life of the lock.
- Enhanced security. Cores must be removed before keyed knobs to deter break-in attempts, and a snap-on inside rose with no exposed screws helps to deter attack
The 8K is a commonly used lock for non-ADA compliant applications, such as governmentand military facilities (barrack doors, base housing, etc.) as well as countries that do not require ADA compliance, such as Latin America.
FEATURES & BENEFITS
- Quick, economical rekeying with the BEST® interchangeable core.
- Knobs machined from brass or bronze bar stock.*
- Rotating knob face provides for easy hand of door change without removing the knob.
- No keeper hole on keyed knobs for added security.
- Keyed knob removable only after the core is removed.
- The tactile or knurled knob feature designed for blind, safety and accessibility applications.
- Friction insert inside rose resists loosening.
- The optional breakaway feature prevents the lockset from being overpowered by a wrench.
- 9/16" throw, deadlocking latch.
- Spin free knob feature permits the lock to be operated only by use of a key.
- Steel retractor with low friction bearings for smooth, wear resistant operation.
- Long bearing length in chassis for smooth, wear resistant operation.
* All knob styles feature solid extruded knob material. Products covered by one or more of the following patents: 5,590,555 5,794,472
STANDARD SPECIFICATIONS
Materials: Internal parts are brass or corrosion-treated steel.
Chassis: 2 1/16" diameter to fit 2 1/8" hole in door.
Backset: 2 3/4" standard, 3 3/4" and 5" available.
Latch: 9/16" throw. Front 2 1/4 x 1 1/8" beveled. Latch housing fits 1" hole in edge of door.
Knobs: Diameter – 2 1/8"
Projection from door– 2 7/8" #4, #6
Knob Material – Machined from solid brass or bronze.
Roses: All roses are brass or bronze reinforced with steel liner. Roses are threaded to chassis.
A – round, 3 3/4" diameter;
C – round, 2 9/16" diameter;
D – convex round, 3 3/8" diameter
E – special trim for 2 1/8" to 3" thick doors
Door Thickness: Adjustable from 1 3/8" to 2” standard. Special “E” trim for 2 1/8" to 3” doors available. The “B” style square trim is for doors 1 3/4" to 2” only.
Strike: (STK) – 2 3/4" x 1 1/8" with curved lip and box standard (ANSI A115.3),
(S3) – 4 7⁄8" x 1 1/4" with curved lip and box available
(ANSI A115.2), (S3-7⁄8) – Conforms to ANSI A115.2 for 1 3⁄4” doors.(4 7⁄8” x 1 7⁄8” flat)
STK (standard) – 2 3/4" x 1 1/8" with curved lip & box. (ANSI A115.2 for 1 3/8" doors).
S3 – 4 7/8" x 1 1/4" with curved lip & box. (ANSI A115.2 for 1 3/4" doors).
Latch & Strike Screws: (STK) Strike Package
(1) 2 3⁄4" Strike plate,
(4) #8-32 / #8-16 x 3/4" Phillips flat head screws. 8KS3 Strike
(1) 4 7/8" Strike plate,
(2) #8-32 / #8-16 x 3/4" Phillips flat head screws,
(2) #12-24 / #12-12 x 3/4" Phillips flat head screws.
Security head machine screws and driver can be ordered for added security.
Finishes
605: Bright Brass
606: Satin Brass
611: Bright Bronze
612: Satin Bronze
613: Oil-rubbed Bronze
625: Bright Chrome
626: Satin Chrome
690: Dark Bronze Coated
Knobs: 2" or 2 1/8" Dia. brass or bronze in round or tulip style.
Latch: 1/2” throw deadlocking latch. Front: 2 1/4" x 1" x 5/32" Standard for 62K. (Optional for 63K), 2 1/4" x 1 1/8" x 5/32" Standard for 63K (Optional for 62K).
Lock and latchsets: Sets consist of latch complete with trim. Type and operation according to set number. Set also includes interchangeable core and two nickel silver keys, keyed to your system.
Material: Component parts include brass or bronze. Internal parts are brass or zinc dichromate steel. Mounting: 2 1/8" Dia. bore for lock housing, 1" Dia. or 7/8" Dia. for latch tube.
Options: KNL– Knurl keyed knob, L8– drive in-latch. Roses: C– 2 9/16" Dia. D– 3 3/8" Dia. Mounting screws concealed.
Strike: STK (standard)– 2 3/4" x 1 1/8" with curved lip & box (ANSI A115.2 for 1 3/8" doors). S3– 4 7/8" x 1 1/4" with curved lip and box (ANSI A115.2 for 1 3/4" doors).
Thickness of doors: 1 3/8" to 1 7/8" Standard. If thickness is greater, use our heavy duty locksets for specified door thickness
DOWNLOAD & RESOURCES
- 8K Series FAQs
- 8K Series Catalog
- 8K Sell Sheet
- 8K Series Service Manual
- Antimicrobial Protected Door Hardware Brochure
- Agion® Antimicrobial Finish for Healthier Door Hardware
- BEST Product Warranty Reference Chart
