Don-Jo SH74545 Full Mortise Spring Hinge 4-1/2" x 4-1/2" Steel, Single Acting, Self-Lubricating

Don-Jo SH74545 Full Mortise Spring Hinge 4-1/2" x 4-1/2" Steel — Single Acting, Self-Lubricating, UL Listed

The Don-Jo SH74545 is a commercial-grade Full Mortise Spring Hinge measuring 4-1/2" x 4-1/2" and constructed from durable steel at a 0.134 gauge. Designed for single-acting door applications, this non-handed hinge features self-lubricating bearings and easy spring tension adjustment, making it a reliable and low-maintenance solution for high-traffic commercial environments. UL Listed and conforming to ANSI K81071F, the SH74545 delivers professional-grade performance across a wide range of door hardware installations.

Key Features

• Full Mortise Design: 4-1/2" x 4-1/2" full mortise configuration provides a clean, flush-mounted installation ideal for commercial door applications.
• Heavy-Gauge Steel Construction: Manufactured from steel at 0.134 gauge for exceptional strength and long-term durability in demanding commercial settings.
• Self-Lubricating Bearings: Integrated self-lubricating bearings reduce maintenance requirements and ensure smooth, consistent door operation over time.
• Easy Spring Tension Adjustment: Tool-accessible spring tension adjustment allows installers and facility managers to fine-tune closing force without removing the hinge.
• Single Acting Operation: Engineered for single-acting door swing, providing controlled, automatic door return in one direction.
• Non-Handed Configuration: Non-handed design simplifies ordering and installation, eliminating the need to specify left- or right-hand orientation.
• Multiple Finish Options: Available in finishes 600, 632, 633, 640, 651, and 652 to coordinate with a wide variety of door hardware and architectural styles.
• Convenient Shelf Pack: Packaged in shelf packs of 24 units for efficient stocking and project-quantity purchasing.

Certifications & Compliance

• UL Listed
• ANSI K81071F
• Commercial Grade

Technical Specifications

• Subcategory: Hinges
• Product Group: Door Hinges and Pivots
• Product Subgroup: Spring Hinges
• Product Type: Spring Hinges
• Commercial/Residential: Commercial
• Product Size: 4.5" x 4.5"
• Product Category: Door Hinges and Pivots
• Department: Door Hardware

Typical Applications

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

Why Don-Jo SH74545?

Don-Jo SH74545 Full Mortise Spring Hinges are built to commercial standards with 0.134-gauge steel construction, self-lubricating bearings, and UL Listed certification — delivering the dependability that demanding door hardware applications require. The non-handed, single-acting design paired with easy spring tension adjustment makes the SH74545 a practical, installer-friendly choice for facilities that need consistent, low-maintenance door control across multiple openings.