Bx-Flex Conduit Fitting, Two Screw Type
Bx-Flex Conduit Fittings, Two Screw Type, are applied on the relay or end point of wiring system to connect metal conduits, junction box or enclosure for wiring extension and protection. The body is made of zinc alloy with RoHS compliance. This series of fitting is proposed to fit with metal flexible conduit series PRWG and PRWA.
S19 series, Snap-in type, is certified by UL laboratory according to UL514B standard. The fitting is pushed to fix to the knockouts of junction box and connected with metal flexible conduit by tightening the plate with two screws.
S20/S21 series is certified by UL laboratory according to UL514B and Canadian CSA-C22.2 No.56 standard. The fitting is fixed to the knockouts of junction box or tapped entries by locknut with external NPS thread system and connected with metal flexible conduit by tightening the plate with two screws.
Feature
-
Material:
Zinc Alloy -
Temperature Range:
-50℃~+200℃ -
IP Rating:
IP 40 -
Surface Finish :
Chromate, other treatments are available by consult. -
RoHS Compliance:
Yes -
Certificate :
UL, cUL (File No.: E256570)
Parameter
| Series No. | Part Number | Product Photo | Fitting Thread | KO Size (Inch) | Conduit Size (Inch) | Package/Box (Pcs) | Weight/Box (Kg) | Snap-In Structure | Certificate | Mated With |
|---|---|---|---|---|---|---|---|---|---|---|
| S19 | S191-3/8 | 
| - | 1/2 | 3/8 | 1000 | 26.2 | V | 
| 
|
| S20 | S2014-3/8 | 
| NPS | 1/4 | 3/8 | 1000 | 26.2 | - | 
|
|
| S20 | S201-3/8 |
| NPS | 1/2 | 3/8 | 1000 | 26.2 | - |
|
|
| S21 | S211-A-3/8 | 
| NPS | 1/2 | 3/8 | 1000 | 26.6 | - |
|
|
| S21 | S213-A-9/16 | 
| NPS | 3/4 | 9/16 | 500 | 26.5 | - |
|
|
| S21 | S214-A-3/4 |
| NPS | 1 | 3/4 | 300 | 22.3 | - |
|
|
| S21 | S215-A-1 |
| NPS | 1-1/4 | 1 | 200 | 22.6 | - |
|
|
| S21 | S216-A-1-1/4 | 
| NPS | 1-1/2 | 1-1/4 | 120 | 19.6 | - |
|
|
| S21 | S217-A-1-1/2 |
| NPS | 2 | 1-1/2 | 100 | 21.8 | - |
|
|
| S21 | S218-A-2 |
| NPS | 2-1/2 | 2 | 50 | 18 | - |
|
|
Frequently Asked Questions
Q: What are the main advantages of the BX Flex Conduit Fitting Two-Screw Type?
A: The Two-Screw Type fitting features a robust dual-screw clamping design that provides exceptional pull-out resistance and mechanical stability compared to standard single-screw or squeeze fittings. It ensures an incredibly secure hold on the flexible metal conduit, preventing accidental dislodgement caused by structural vibrations or cable tension in commercial and industrial electrical installations.
Q: Which models are included in this series, and how do they differ in installation?
A: This series mainly includes S19, S20, and S21 models. The primary difference lies in their box-mounting mechanism: S19 features a tool-free Snap-In design with a 65Mn spring steel clip for fast installation, while S20 and S21 utilize a traditional male NPS (National Pipe Straight) thread equipped with a zinc die-cast locknut for a permanent, highly rigid connection to junction boxes and enclosures.
Q: Are these two-screw fittings compliant with North American electrical standards?
A: Yes, our BX two-screw fittings are strictly manufactured to meet UL514B (Underwriters Laboratories) and Canadian CSA-C22.2 No.56 standards. They hold official cURus certification (File No. E256570), ensuring full compliance with the National Electrical Code (NEC) for equipment grounding paths and reliable wire protection.
Q: What materials are used, and what is the working temperature range?
A: The main body and locknut are made of premium heavy-duty zinc alloy die-cast with a corrosion-resistant chromate finish, while the clamping screws are made of zinc-plated steel. The entire assembly is RoHS compliant and operates flawlessly across an ultra-wide temperature range from -50°C to +200°C (-58°F to +392°F), making it perfect for HVAC, lighting fixtures, and data center deployments.
Q: What conduits are compatible with these two-screw fittings, and how can I order?
A: These fittings are precisely engineered to pair with our PRWG series (Galvanized Steel Greenfield) and PRWA series (Aluminum) reduced-wall flexible metal conduits, with trade sizes ranging from 3/8" to 1". For custom specifications, wholesale pricing, or bulk OEM/ODM requests, please contact our global sales department at info@flexible86.com or call +86-563-6636999.
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