Overview
Engineered for rigorous commercial building codes, high-traffic corridors, and fire-rated egress stairwells, the Commercial 304 Stainless Steel Fire-Rated Mortise Door Lock Set provides certified life-safety performance and heavy-duty physical security. Built around a standard DIN 7260 mortise lockcase (60mm backset, 72mm centers), this complete architectural lockset includes heavy-gauge 304 stainless steel U-shaped safety lever handles designed to prevent clothing and equipment snags during emergency evacuations. Featuring a reversible non-handed latch bolt, a high-throw solid deadbolt, and a precision Euro-profile cylinder with computer-milled keys, this lockset offers an enduring, anti-corrosion solution for commercial steel doors, institutional wood fire doors, cleanrooms, and hospitality facilities.

Key Features

• Grade 304 Stainless Steel Construction: Heavy-duty solid 304 stainless steel lever handles, escutcheon roses, and faceplate deliver maximum corrosion resistance, fire endurance, and tensile strength.
• DIN 7260 Commercial Mortise Lockcase: Standard architectural 72mm center-to-center (PZ) spacing and 60mm backset with a 235mm x 22mm rounded faceplate fit global commercial door preps.
• Life-Safety Return-to-Door "U" Lever Design: Ergonomic tubular curved lever handle curves back toward the door face, meeting commercial safety guidelines to prevent snagging clothes, straps, or fire hoses.
• Universal Non-Handed Reversible Latch: Tool-assisted push-and-turn latch mechanism allows fast field adjustment for left-hand or right-hand, inward or outward swinging doors.
• High-Security Euro Profile Cylinder: Available with solid brass/copper high-security cylinder cores with computer-cut dimple/serrated keys and smooth interior thumbturn privacy operation.
• Heavy-Duty Fire Egress Spring Mechanism: High-cycle internal torsion springs prevent handle sagging and withstand continuous high-frequency commercial cycling.
• Complete Installation Package: Supplied with mortise lock body, pair of lever handles, cylinder with keys, round escutcheons, reinforced strike plate, dust box, spindle, and high-tensile through-bolts.

Technical Specifications

• Product Type: Commercial Fire-Rated Mortise Lockset
• Lock Body Standard: European / DIN 7260 Mortise Lock
• Backset: 60 mm (2.36 in)
• Centers (PZ): 72 mm (2.83 in)
• Faceplate Dimensions: 235 mm L x 22 mm W with radiused / rounded corners
• Handle Style: Commercial Safety Return U-Shaped Tubular Lever
• Material: Premium 304 Stainless Steel (faceplate, strike, handles, roses); high-strength galvanized steel lockcase
• Cylinder Type: Euro-profile cylinder (solid brass core) with interior thumbturn & exterior keyway
• Door Handing: Field reversible (Left-hand or Right-hand)
• Applicable Door Thickness: 40 mm – 55 mm (1.57 in – 2.16 in) standard (custom spindles available)
• Door Compatibility: Hollow metal fire doors, commercial steel doors, solid wood fire doors

Wholesale & OEM Capabilities
Ningbo Dimon Metal Products Co., Ltd. is an experienced commercial door hardware manufacturer delivering contract-grade architectural hardware for builders, contractors, and international hardware importers:

• Keying System Options: Master Key (MK), Keyed Alike (KA), and Construction Keying systems available for hotel, commercial, and multi-family residential projects.
• Material & Core Configurations: Flexible OEM specifications including 304 vs. 201 stainless steel, solid brass vs. aluminum cylinders, and ANSI-grade customized faceplates.
• Architectural Finishes: Standard satin brushed stainless steel, matte black PVD, satin nickel, or custom PVD architectural coatings.
• B2B Project Packaging: Packed in individual heavy-duty contractor boxes with clear labeling and templates, ready for containerized ocean shipping (FOB Ningbo / CIF).