Marks USA MAR175RAB 175RAB IC Entry Lever Lockset — Grade 2 Survivor Series, American Lever, IC Less Core

Marks USA 175RAB IC Entry Lever Lockset — Grade 2 Survivor Series, American Lever, IC Less Core

The Marks USA 175RAB is a Grade 2 cylindrical lever lockset from the Survivor Series, engineered for Entry function with an Interchangeable Core (IC) Less Core configuration. Built on a chassis featuring cast retractors on bronze roller bearings, this lockset is rated to exceed BHMA Grade 1 specifications by 300% — surpassing 3.6 million cycles — making it an exceptional choice for high-traffic commercial applications. It accommodates 2-3/8" and 2-3/4" backsets and is 3-Hour fire rated, with door thickness compatibility of 1-5/8" to 1-7/8" (use K1904 spacer for 1-3/8" doors).

Key Features

• Exceptional Cycle Rating: Exceeds BHMA Grade 1 specifications by 300%, tested to over 3.6 million cycles for outstanding long-term reliability in demanding commercial environments.
• Unique Clutch Mechanism: The Survivor Series features a stainless steel "clutch" that disengages levers from the retractor and interior mechanisms when locked, allowing levers to swing freely without resistance — dramatically reducing wear, abuse, and lever droop.
• Bronze Roller Bearing Construction: Cast retractors on bronze roller bearings provide a strong, durable chassis foundation available in both knob and lever configurations.
• Backset & Door Compatibility: Supports 2-3/8" and 2-3/4" backsets; compatible with door thicknesses of 1-5/8" to 1-7/8"; use K1904 spacer for 1-3/8" doors.
• Latch Specifications: Latch #1134 with 1-1/8" x 2-1/4" front, 1/2" throw, and stainless steel nose for corrosion resistance and smooth operation.
• Solid Cast Zamac Levers: American-style levers are solid cast Zamac with 1/2" return, mounted on thru-bolted roses (3-1/4" dia.) with spring-loaded 2-#10 thru-bolts for secure, stable installation.
• 3-Hour Fire Rated: Certified 3-Hour fire rating supports use in fire-rated door assemblies for code-compliant commercial installations.
• Marks Lifetime Mechanical Warranty: Backed by Marks USA's lifetime mechanical warranty for long-term confidence and lower total cost of ownership.

Certifications & Compliance

• ANSI/BHMA Certified
• UL Listed
• Exceeds BHMA Grade 1 by 300% (3.6 million cycles)
• 3-Hour Fire Rated
• ADA Compliant
• Marks USA Lifetime Mechanical Warranty

Technical Specifications

• Series: 175 Series
• Product Group: Mechanical Locks
• Product Subgroup: Bored Locksets
• ANSI/BHMA: ANSI/BHMA, UL Listed
• Commercial/Residential: Commercial
• Function Description: Outside knob/lever locked by pushbutton on inside knob/lever. Rotating inside knob/lever or closing door releases/unlocks button. Emergency release in outside knob/lever.
• ADA Compliant: Yes
• Keyed: No
• ANSI Function: F76
• Product Function: Privacy/Bed/Bath
• Door Thickness Range: 1-3/4"
• Strike Classification: ANSI, 1-1/4" x 4-7/8", 1-1/4" Lip, Square Corner
• Product Category: Mechanical Locks
• Department: Door Hardware

Typical Applications

• Commercial Office Buildings
• Educational Facilities
• Healthcare Institutions
• Retail Establishments
• Multi-Tenant Residential Properties
• Government and Municipal Buildings
• Industrial and Warehouse Facilities

Why Marks USA 175RAB?

Marks USA 175 Series Survivor locksets are built with solid cast Zamac levers, bronze roller bearings, and a proprietary stainless steel clutch mechanism that sets them apart from standard cylindrical lever sets. Rated to exceed BHMA Grade 1 by 300% at over 3.6 million cycles and carrying a 3-Hour fire rating, these locksets deliver professional-grade performance and durability for the most demanding commercial door applications.