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AL COMP LUG 1 HOLE No4 STR 3/8 BOLT
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 .875 inch, Pad 1.000 inch x .625 inch wide x .187 inch thick
Blackburn AL 4-38 TN – Frequently Asked Questions
1) What wire size does the Blackburn AL 4-38 TN compression lug take?
The AL 4-38 TN is sized for #4 STR AWG conductor. It's a single-conductor compression barrel, so the cable has to be #4 stranded, not a range. Run #2 or #6 and the crimp won't hold to spec, you need the lug built for that size.
2) Will this lug bolt to a 3/8 inch stud on my ground bar or breaker pad?
Yes. The AL 4-38 TN has one hole sized for a 3/8 inch bolt. The tongue measures 1.000 inch long by .625 inch wide by .187 inch thick, so check your pad has that much landing area and clearance for a single fastener. Overall length is 2.250 inches with a .875 inch barrel.
3) Can I use an aluminum body lug on copper wire?
The AL 4-38 TN is an aluminum-bodied compression lug that is tin plated, which is the standard dual-rated construction for terminating either aluminum or copper conductors, and the tin plating is what keeps the aluminum barrel from galvanic trouble against a copper bus or stud. Confirm the AL9CU dual rating marking on the body for your inspector if the job calls for copper.
4) What temperature rating does this Blackburn compression lug carry?
Rated to 90 degrees C, which lines up with THHN/THWN-2 and XHHW-2 conductors run at their 90 C insulation rating. It also meets ANSI C119.4, the standard for connectors used on aluminum and copper conductors.
5) Do compression lugs or mechanical set screw lugs make more sense for a #4 feeder termination?
A compression lug like the AL 4-38 TN is crimped once with a die tool and never needs re-torquing, which is why it gets specified for permanent feeder and ground terminations and in vibration-prone gear. A mechanical set screw lug installs with just a hex key and can be reused, better where conductors may be swapped or where you don't have a crimper on site. The tradeoff is the set screw needs torque verification and periodic checking.
6) Is this lug made in the USA for a Buy American spec job?
Country of origin on the AL 4-38 TN is the United States, which is the line item a government, education, or federally funded project submittal usually needs. It also references ANSI C119.4.
7) Is this lug insulated, and do I need to cover it after crimping?
No insulation on the AL 4-38 TN, it's a bare barrel and pad. Anywhere the termination sits in a live enclosure you'll want heat shrink or tape over the barrel and exposed strands yourself, since nothing is supplied on the connector.
8) Is the Blackburn AL 4-38 TN sold individually or in a bag?
Sold each, so order one per termination. Count both ends of every run plus your grounding electrode and bonding jumper landings before you buy for a panel job.
How fast can I get the Blackburn AL 4-38 TN delivered?
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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 AL 4-38 TN come with a warranty?
Absolutely. The Blackburn AL 4-38 TN 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 AL 4-38 TN?
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