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Polished brass tulip knob lockset with matching rose and strike plate

Master Lock

Master Lock TUO0303/T6P Tulip Knob Lockset Privacy Grade 3

SKU CH-20F5-R9STN

A polished-brass tulip knob lockset with privacy function, ANSI Grade 3 security and adjustable backset for standard interior doors

  • TypeDoor Hardware & Components
  • StyleTUO Tulip
  • Privacy function secures bathrooms and bedrooms
  • Polished brass finish resists tarnish and adds classic style
  • ANSI Grade 3 meets residential security standards
  • Adjustable backset fits 2 3/8 to 2 3/4 in. doors
  • Steel construction provides durable everyday performance

Product Identity

The Master Lock TUO0303/T6P is a tulip-style door knob lockset designed for interior privacy applications. It suits homeowners and contractors fitting bedrooms or bathrooms where a locking function is required without a keyed cylinder. The polished brass finish coordinates with traditional hardware schemes. Grade 3 construction meets ANSI standards for residential duty.

Deciding Specification

The lock carries an ANSI Grade 3 rating, the baseline level for residential door hardware. This grade confirms the lockset passes cycle, strength and finish tests appropriate for interior privacy doors in homes. Buyers needing commercial-grade durability or higher security should select hardware rated Grade 2 or Grade 1 instead.

Installation Context

The lockset fits standard doors between 1 3/8 and 1 3/4 inches thick with a backset adjustable from 2 3/8 to 2 3/4 inches. A 2 1/8 inch crossbore and the included 2 1/4 by 1 3/4 strike plate are required. Steel construction provides the structural core while the tulip knob operates the privacy latch from either side.

Highlights

  • Privacy function secures bathrooms and bedrooms
  • Polished brass finish resists tarnish and adds classic style
  • ANSI Grade 3 meets residential security standards
  • Adjustable backset fits 2 3/8 to 2 3/4 in. doors
  • Steel construction provides durable everyday performance

Specifications

BrandMASTER LOCK
TypeDoor Hardware & Components
StyleTUO Tulip

Questions about this item

What does Grade 3 mean for everyday use on a bedroom or bathroom door?

Grade 3 meets the ANSI standard for residential security, so the lock handles normal interior traffic without the heavier construction required for commercial doors.

How does the adjustable backset work with the 2 1/8 inch crossbore?

The latch adjusts between 2 3/8 and 2 3/4 inch backsets while fitting the standard 2 1/8 inch crossbore cut in most interior doors.

Will this tulip knob set fit my 1 1/2 inch thick door?

Yes, the lockset accommodates doors from 1 3/8 to 1 3/4 inch thick, covering the common 1 1/2 inch interior door.

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