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ADR21AR WITH HEX HEAD SCREW
Manufacturer Resources
Product Specs
- Country Of Origin:
- Mexico (MX)
- Number Of Conductors:
- 1
- Product Group:
- Wire & Cable Management
- Product Type:
- Anti-Rotational Mechanical Connector
- Selling Unit Of Measure:
- each
- Spacing:
- 1/4 in
- Standards:
- UL E9809
- Surface Finishing:
- Tin-Plated
- Type2:
- Mechanical connectors
- Department:
- Electrical
- Product Subgroup:
- Connectors
- Product Material:
- Aluminum
Blackburn ADR21ARH – Frequently Asked Questions
1) What is the Blackburn ADR21ARH connector used for?
The ADR21ARH is an anti-rotational mechanical connector for terminating a single conductor. It is a screw-type aluminum body connector, supplied with a hex head screw rather than a slotted or socket screw, so it is driven with a nut driver or socket. Sold individually.
2) Can the Blackburn ADR21ARH be used on copper conductors as well as aluminum?
The body is aluminum with a tin plating, which is the standard construction for a dual-rated AL/CU mechanical connector: the tin plate is what lets an aluminum body contact copper without a dissimilar-metal reaction. Match the conductor size to the connector's rated range before terminating, and use an oxide-inhibiting compound on aluminum conductors per normal practice.
3) What does the anti-rotational feature on the ADR21AR connector actually do?
An anti-rotational mechanical connector is shaped so the body cannot spin on the conductor or pad while the screw is being torqued. In practice that means you can tighten it one-handed without holding the body, and the termination stays oriented where you set it. This is the ADR21AR with a hex head screw.
4) What is the 1/4 inch spacing on the Blackburn ADR21ARH?
The connector is specified with 1/4 inch spacing, which is the mounting hole dimension you lay out against. Check it against the bolt pattern or stud on the pad, busbar, or ground rod clamp you are landing on.
5) Does the ADR21ARH come as a single piece or in a bag of multiples?
The ADR21ARH is sold each, so one order unit gets you one connector with its hex head screw. Order per termination, not per pair of conductors, since each connector takes a single conductor.
6) Do I need a special tool to install the Blackburn hex head version of the ADR21AR?
No special tool. The hex head screw takes a standard nut driver, socket, or wrench, which is easier to get full torque on in a tight enclosure than a slotted screw. That head style is the only thing separating this from the base ADR21AR.
7) Where is the Blackburn ADR21ARH made, for a domestic-content submittal?
Country of origin is Mexico. If the job carries a Buy American or domestic-content requirement on electrical fittings, this one will not satisfy it.
How fast can I get the Blackburn ADR21ARH delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Blackburn ADR21ARH come with a warranty?
Absolutely. The Blackburn ADR21ARH is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Blackburn ADR21ARH?
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product
selection,
installation tips, and troubleshooting. Contact Us
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