Ives 5BB1 4.5 x 4.5 Inch NRP Ball Bearing Hinge

The Ives 5BB1 4.5 x 4.5 Inch NRP Ball Bearing Hinge is a full mortise, five-knuckle hinge built for medium to heavy-weight doors in commercial and institutional settings. Its two ball bearings reduce friction and promote smooth, quiet operation over years of frequent use. The non-removable pin (NRP) design adds an extra layer of security by preventing the pin from being pulled when the door is in the closed position, making it well suited for exterior and out-swinging door applications. With a 4.5-inch square size and durable steel construction, this hinge delivers dependable, long-lasting performance in demanding environments.

Features

• Five-knuckle, full mortise design for standard commercial door preparation.
• Two ball bearings deliver smooth, low-friction swing action.
• Non-removable pin (NRP) enhances security on out-swinging doors.
• 4.5 x 4.5 inch size supports medium to heavy-weight doors.
• Steel construction provides strength and durability for high-traffic use.

Functional Details

The non-removable pin feature secures the hinge pin in place so it cannot be removed while the door is closed, protecting against tampering or forced entry on exterior and reverse-bevel doors. Combined with the ball bearing design, the hinge balances security with reliable, quiet operation.

• Full mortise, standard weight, ball bearing hinge.
• Recommended for high-frequency, medium to heavy-weight doors.
• Non-removable pin (NRP) for added security.