Brass Door Viewer 20mm Extension Tube Model F1012J-20

Technical Specifications

Parameter	Specification Details
Model Number	F1012J-20
Material	Machined Solid Brass
Compatible Tube Diameter	12 mm
Extension Length	20 mm
Standard Finish	CP – Chrome Plated
UL Fire Rating	Optional 1/3 H or 1.5 H Fire-Resistant
Target Applications	Accommodating thick commercial doors, armored entries, and insulated panels

Key Benefits & Target Applications

Core Hardware Advantages

• Seamless Modular Threading: Engineered with high-precision internal and external threads to join perfectly with the 1012 door viewer series, ensuring a solid, gap-free fit.
• Solid Brass Durability: Machined from premium solid brass, preventing cross-threading, stripping, or weakening under the pressure of thick doors.
• Inventory Cost Reduction: Enables distributors and manufacturers to easily convert standard door viewers to fit deeper panels on demand, reducing the need to stock multiple viewer lengths.
• Fire Compliance Maintenance: Optional UL fire-rated certifications ensure that the extension does not compromise the rating of the overall fire door assembly.

Primary Application Environments

• Thick Armored Entry Doors: Adapts standard door viewers to heavy-gauge armored and reinforced residential doors.
• Acoustic and Insulated Panels: Ideal for thick soundproof studio doors, cold-storage panels, and thermal-insulated exterior entries.
• Deep Commercial Openings: Suited for commercial structures, banks, and secure institutions requiring non-standard door thicknesses.
• Custom Luxury Pivot Doors: Fits oversized custom wood or composite architectural entries exceeding standard specifications.

Custom Finishes

We offer several standard finishes to match your door hardware and viewer specifications:

• SC: Satin Chrome
• SN: Satin Nickel
• PB: Polished Brass
• CP: Chrome Plated – Standard
• G: Gold Plated
• AC: Antique Copper
• AB: Antique Brass
• ORB: Oil Rubbed Bronze

B2B Procurement Terms

To support commercial buyers, distributors, and door manufacturing plants, we provide standard export trade terms:

• Minimum Order Quantity: Please contact our sales department for specific finish and volume requirements.
• Production Lead Time: Typically 25 to 40 days depending on the batch order size and finishing options.
• Sample Policy: Physical product samples are available for quality evaluation and thread-fit testing by qualified trade buyers.
• Incoterms and Port of Loading: FOB Ningbo, Shanghai, or Tianjin.
• Export Packaging: Shipped in standard industrial packaging. Bulk packing is ideal for door manufacturers and hardware distributors.
• Technical Drawings: We provide 2D and 3D CAD files to engineering teams and door manufacturers for pre-installation planning.

Manufacturing Capabilities and Certifications

Beijing Oupuoptic Instrument Co., Ltd. began operations in 2001 in Tongzhou District, Beijing. To support large-volume global exports, we established our modern manufacturing facility, Zhejiang Guocheng Technology Co., Ltd., in Zhejiang province in 2019.

Our manufacturing infrastructure and legacy include:

• A modern production facility covering over 5000 square meters.
• A workforce of more than 100 professionals.
• Automated CNC machining and precision optical lens assembly lines.
• Full ISO9001 quality system certification.
• Direct import and export authorization.

Our optical engineering history:
Our Chairman, Mr. Shao Wencai, is an experienced optical designer who was deeply involved in developing China’s first-generation door viewer in 1978. He patented a 180-degree wide-angle door viewer in 1990, securing a national patent. He later designed a dual-purpose door viewer in 1998, followed by an enhanced optical door viewer system in 2006.

Our door viewer series is UL certified, satisfying the fire safety standards of both the United States and Canada.

Frequently Asked Questions