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Manufacturer Resources
Product Specs
- Country Of Origin:
- Mexico (MX)
- Product Subgroup:
- General Terminals
- Product Type:
- Nylon Insulated Ring Terminal
- Standards:
- UL E9809
- Voltage Rating:
- 600 V
- Wire Size:
- 4AN
- Department:
- Electrical
- Product Group:
- Wire Termination
- Product Color:
- Yellow
- Product Material:
- Copper
Sta-Kon RF10721 – Frequently Asked Questions
1) What wire size does the Sta-Kon RF10721 ring terminal crimp onto?
The RF10721 is sized for 4 AWG conductor. Yellow is the insulation color on this one, so if you are matching a bin of color-coded terminals, yellow here means the 4 AWG body, not the usual small-gauge yellow in the red/blue/yellow 22-10 AWG family. Use a crimp die matched to a 4 AWG lug, not a standard hand crimper for insulated terminals.
2) What stud or bolt size does the RF10721 ring terminal fit?
It is a 5/16 inch ring, so it drops over a 5/16 inch stud, bolt, or breaker lug screw. Check the ring tongue clears your terminal block spacing before you crimp the lug on, since a 4 AWG barrel is bulky next to adjacent poles.
3) Is this ring terminal rated for 600 volt panel and control work?
Yes, the RF10721 carries a 600 V rating and is UL recognized under file E9809, which covers it for typical panelboard, switchgear, and motor control terminations at 600 V and below.
4) Is the RF10721 terminal copper or aluminum, and can I use it on aluminum conductor?
The barrel is copper, so it is a copper-only (Cu) termination. Do not crimp it onto aluminum conductor; aluminum runs need a listed AL/CU or AL-rated connector with the proper inhibitor compound.
5) Is a ring terminal or a fork terminal the right choice for a 4 AWG battery or feeder lead?
Use the ring. A ring tongue is captive, so it cannot vibrate off a loosened 5/16 inch stud the way a fork or spade can. On heavy 4 AWG leads feeding batteries, bus studs, or motor terminals, the mass of the cable plus vibration is exactly the condition that backs a fork terminal out. Forks are for quick-disconnect service points where you want to pull the lead without removing the nut.
6) Can I order the RF10721 in a different ring size or wire gauge?
No. The RF10721 is a single configuration: 4 AWG barrel, 5/16 inch ring, yellow nylon insulation. A different stud size or conductor gauge is a different Sta-Kon part number.
7) What does the nylon insulation on this ring terminal do that a vinyl one does not?
The RF10721 uses a nylon insulating sleeve rather than vinyl. Nylon is tougher against abrasion and cut-through when the lug is pulled into a wireway or flexed at a hinged panel door, and it holds up better at elevated temperature. For a 4 AWG lead that will be bundled and pulled, that matters more than it does on small control wire.
8) For a government or institutional order, where is the Sta-Kon RF10721 made?
Country of origin is Mexico. That is the figure to put on a procurement form asking for origin on the RF10721.
How fast can I get the Sta-Kon RF10721 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 Sta-Kon RF10721 come with a warranty?
Absolutely. The Sta-Kon RF10721 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 Sta-Kon RF10721?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Sta-Kon RF10721 from ZenSupply?
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and
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