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Manufacturer Resources
Product Specs
- Connection Type:
- Compression
- Country Of Origin:
- United States (US)
- Insulation Material:
- None
- Product Group:
- Wire & Cable Management
- Product Type:
- Compression Lug One Hole
- Selling Unit Of Measure:
- each
- Standards:
- ANSI C119.4
- Surface Finishing:
- Tin Plated
- Temperature Range:
- 90 °C
- Type2:
- Wire connectors
- Wire Size:
- #4 STR AWG
- Department:
- Electrical
- Product Subgroup:
- Connectors
- Product Size:
- Length 2.250 inch, Barrel .938 inch, Pad .969 inch x .625 inch wide x .187 inch thick
Blackburn AL 4-516 TN – Frequently Asked Questions
1) What wire size does the Blackburn AL 4-516 TN compression lug take?
The Blackburn AL 4-516 TN is sized for #4 STR AWG conductor. It is a one hole compression lug, so it gets crimped onto the conductor with a compression tool and die rather than tightened with a set screw. One lug per conductor termination, sold each.
2) Will the AL 4-516 TN lug bolt to a 5/16 inch stud on my panel or bus bar?
Yes. The AL 4-516 TN is a one hole lug drilled for a 5/16 inch bolt. The tongue measures .969 inch long by .625 inch wide by .187 inch thick, and overall length is 2.250 inches with a .938 inch barrel, so check that your lug landing has room for that pad width and bolt spacing before you crimp.
3) Does this compression lug meet ANSI C119.4 for a utility or inspected commercial job?
Yes, the AL 4-516 TN is built to ANSI C119.4, the standard covering connectors for use between aluminum and aluminum, or aluminum and copper, conductors. That is the spec most utility and commercial electrical submittals call out for compression connectors. It is manufactured in the United States.
4) Can I use an aluminum compression lug like the AL 4-516 TN on copper conductor?
The AL 4-516 TN is an aluminum body lug with a tin plated finish. Tin plating is what makes an aluminum barrel suitable for dual rated use and keeps the aluminum pad from galvanic trouble against copper bus. Confirm the AL/CU dual rating marked on the lug body itself before terminating copper, since the crimp die and conductor material have to match what the lug is stamped for.
5) What temperature rating does this Blackburn lug carry, and can I use it on 90 degree C wire?
It is rated to 90 degrees C, which lines up with THHN/THWN-2 and XHHW-2 conductor insulation ratings. Ampacity on the circuit still has to be taken at whatever the terminal rating of the equipment allows, but the lug itself is not the limiting piece at 90 C.
6) Does the AL 4-516 TN lug come insulated or do I need to add heat shrink?
There is no insulation on this lug. The barrel and pad are bare tin plated aluminum, so if the termination needs to be covered you add heat shrink, tape, or a boot yourself. That is normal for compression lugs landing in a panel or gutter where the terminal is inside an enclosure.
7) What is the difference between a compression lug like this and a mechanical set screw lug?
A compression lug such as the AL 4-516 TN is crimped permanently onto the conductor with a hydraulic or battery tool and the matching die, giving a gas tight termination that does not need re-torquing. A mechanical lug uses a set screw and can be removed and reused, but it has to be torqued to spec and checked over time. Pick compression where you want a permanent, vibration resistant termination and have the tooling on site; pick mechanical where the conductor may be changed out or you have no crimper.
8) How many AL 4-516 TN lugs do I order for a three phase feeder pull?
They are sold individually, so count one lug per conductor end you are terminating. A three phase feeder with a neutral terminated at both ends on #4 conductor takes eight lugs, plus whatever you need for the equipment grounding conductor if it is also #4 and landing on a 5/16 stud.
How fast can I get the Blackburn AL 4-516 TN delivered?
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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 AL 4-516 TN come with a warranty?
Absolutely. The Blackburn AL 4-516 TN is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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