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Manufacturer Resources
Product Specs
- Application:
- Wiring terminations or connections for applications such as wiring harness, panelboard, telecommunications, and automotive.
- Country Of Origin:
- United States (US)
- Product Subgroup:
- General Terminals
- Product Type:
- Vinyl Insulated Ring Terminal
- Standards:
- UL E9809
- Voltage Rating:
- 600 V
- Wire Size:
- 22-16 AWG
- Department:
- Electrical
- Product Group:
- Wire Termination
- Product Color:
- Red
- Product Material:
- Copper
Sta-Kon RA857M – Frequently Asked Questions
1) What wire gauge does the Sta-Kon RA857M ring terminal crimp onto?
The RA857M takes 22 to 16 AWG stranded copper conductor. That red insulation is the standard color code for the 22-16 range, so a tech can spot the right barrel size in a bin without reading the stamp. Anything 14 AWG or larger needs a different terminal.
2) What size stud or screw does the RA857M ring fit over?
The ring is sized for a No. 6 stud or screw. If your terminal block or ground lug uses a No. 8 or 10 screw, the tongue will not pass over it, so order the matching larger ring instead of forcing this one.
3) Is this Sta-Kon terminal UL listed for panel work?
It carries UL file E9809. For an inspector or an institutional spec that requires listed wire connectors on panelboard terminations, that is the reference to cite.
4) Can I use this ring terminal on a 480V control panel?
Yes. The RA857M vinyl insulated ring terminal is rated 600 V, which covers 120, 240, and 480 V control and power circuits.
5) Why pick a ring terminal instead of a fork or spade for a terminal strip?
A ring tongue has to be slipped over the stud, so it cannot vibrate off if the screw backs out slightly, which is why the RA857M suits wiring harness, panelboard, telecom, and automotive terminations. A fork or spade slides out sideways under a loosened screw but lets you drop the wire in without removing the screw, so it is the faster choice on dense terminal strips you service often.
6) Is the barrel on the RA857M copper or aluminum, and does that matter for my conductor?
The terminal body is copper, so it is for copper conductor only. Crimping it onto aluminum wire creates a dissimilar metal joint that corrodes; aluminum needs an AL/CU rated connector instead.
7) Are these Sta-Kon terminals made in the USA for a Buy American job?
Country of origin on the RA857M is the United States, which is the documentation point government and institutional buyers need for domestic-preference procurement.
8) What does the mylar insulation on the RA857M add over plain vinyl?
It is a vinyl insulated ring terminal with a mylar sleeve lining the insulation. The mylar backs up the vinyl where the wire enters the barrel, which helps resist splitting during the crimp on harness and automotive work.
How fast can I get the Sta-Kon RA857M 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 RA857M come with a warranty?
Absolutely. The Sta-Kon RA857M 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 RA857M?
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 RA857M from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.