AFL OPN-350SS Indoor/Outdoor 2-Coupler Fiber Demarcation Box (6.3" x 7.8" x 2") | DM000795

Reference#: 68201
Item#: AF-OPN-350SS


The OptiNID (OPN) 300 series are optical demarcation closures designed for use in either indoor or outdoor environments. Smaller to suit FTTH demarcation applications and versatile to suit fiber optic, Cat5 or coax connections, the AFL OPN-350SS is equipped to handle up to two adapters each. Configured with routing rings positioned to accommodate safe slack storage, the OPN-300 series closures can be either wall- or pole-mounted for ease of use and accessibility.

An indoor/outdoor optical slack storage box is a safe and practical way to interconnect public and private networks. The demarcation enclosure is made of a thermoplastic alloy that is resistant to rain, snow, wind and fire. It has a self-latching hinged cover to reduce the amount of piece and can hold two adapters for different network setups. You can use NPT conduit, compression cable or grommeted entry port fittings for installation.


Use the OptiNID 350-SS Optical Enclosure in basements, garages, server rooms, on utility poles or wherever else the demarcation point is for your networks. It can be configured to meet your needs for broadband data and voice communications and interconnections.


OPN-350SS demarcation box

1 SC/APC adapter

Splice chip

Ground stud

Standard shipping will typically have the OPN-350SS on your doorstep within five business days. Our Fiber Demarcation Box page has more enclosure options along with splice trays and pedestals.


The right fiber optic demarcation enclosure will save you money by ensuring strong connections, making them accessible and preventing weather damage. Discount Low Voltage has bulk pricing on the AFL OptiNID 300 Series on top of our already-low everyday rates. Qualifying bulk orders ship for free as well.


Have a question? Call us toll-free or send an email on weekdays or download the datasheet anytime. Our in-house product video goes over the highlights of the storage enclosure and how they work in practice.

Additional compatible fiber couplers:
1) Duplex LC-LC Fiber Coupler Panel Insert - Blue
2) Duplex LC-LC Fiber Coupler Panel Insert - Aqua
3) Simplex SC-SC Fiber Coupler Panel Insert - Blue


- Weather-resistant thermoplastic alloy
• Self-latching, hinged cover design allows easy access without loose parts
• Routing rings positioned for safe slack storage
• Capacity for up to two adapters
• Ground stud provided in the OPN-350SS
• 1/2" or 3/4" NPT conduit fitting, compression cable fittings or grommeted entry ports
• Locations available on front cover for custom logos


Dielectric Strength: Minimum 2500 Vrms for 1 minute
- High Temperature Storage/Mold Stress °F (°C): 14 days at 159 (70.55)
- Temperature Cycling with Humidity °F (°C): 150 day cycling from 40-140 (4.44-60) with 95% RH
- Impact Test °F (°C): -40 (-40), 5 ft/lbs on all external surfaces
- Drop Test °F (°C): -40 (-40), 5 ft onto concrete surface four times
- Rain: 24 hours at 10 psi
- UV Resistance (Days Exposed): 60 per ASTM-G26-84
- Salt Fog (Days Exposed): 60 per ASTM-BLL7-90
- Flammability: UL94-5V
- Chemical Resistance: 30 Days at 100°F and 95% RH. Resists chipping and/or cracking when subject to house paint, wasp spray, sulfuric acid, kerosene and sodium hydroxide
- Material: UL listed flame retardant thermoplastic alloy
- Dimensions (H x W x D) in. (cm): 6.3 x 7.8 x 2.0 (15.7 x 19.7 x 5.0)
- Cable Entrance - diameter: 3 x 1/2" NPT (0.875")
- Covers: Standard, molded-in snap finger and "F" termination