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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

  • Product typeDoor Hardware & Components
  • Design 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.

How it compares

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

Price $14.99
Cheaper than about 78% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameMASTER LOCK
Product typeDoor Hardware & Components
Design 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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