LCN 4021-3071 RH 689 STD Cylinder Assembly AL

LCN 4021-3071 RH 689 STD Cylinder Assembly AL delivers unmatched reliability for high-traffic environments. Designed specifically for commercial applications, this standard cylinder assembly features a right-hand configuration and is constructed from durable aluminum, ensuring longevity and performance where it matters most. The 4020 Series is recognized for its heavy-duty design, providing fast and precise installation with a regular arm and standard plastic cover. It is suitable for interior doors up to 5'0" and exterior doors up to 4'0", while the adjustable non-sized cylinder caters to interior doors up to 4'6" and exterior doors up to 3'6". This model mounts on the top jamb of push-side doors and is compliant with ADA requirements, ensuring accessibility without compromising on security. Available in a matte silver finish (689/US28) and customizable options, including a plated finish and corrosion-resistant SRI primer, the 4021-3071 is as versatile as it is robust. With a 30-year limited warranty and UL and cUL listings, it meets ANSI Standard A156.4, grade one, making it a reliable choice for any commercial setting. When you need a dependable door closer that stands up to the test, LCN's 4021-3071 is the solution.

STD Cylinder Assembly AL

Standard Cylinder Assembly, Right Hand, Aluminum

The 4020 Series is designed specifically for high traffic applications.

LCN's 4020 Series is their best performing heavy duty closer that is known for its fast and accurate installation.

• Standard 4020 series closer is shipped with regular arm, standard plastic cover, and self reaming and tapping screws. See the Options tab for options.
• Sized cylinders for interior doors to 5’0” and exterior doors to 4’0”.
• Non-sized cylinder (4021) adjustable for interior doors to 4’6” and exterior doors to 3’6”.
• Closer mounts top jamb (push side), specify right or left swinging door.
• 4021 cylinder meets ADA requirements.
• Standard or optional custom powder coat finish.
• Optional plated finish on metal cover, arm and fasteners.
• Optional SRI primer for installations in corrosive conditions is available with powder coat only.
• The 4020 Series is UL and cUL listed with regular or fusible link arms for self-closing doors.
• Tested and certified under ANSI Standard A156.4, grade one.

Resources

• 4020 Series Surface Mounted Closers Cut Sheet
• LCN 4000 Series Catalog
• LCN 4010, 4020 & 4110 Door Closer w/ Fusible Link Arm Installation Guide
• LCN 4020 Series Cut Sheet
• LCN 4020 Series Installation Instructions
• LCN Closers & Auto Operators Installation Guide
• Von Duprin Finishes Chart