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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:
- 18-14 AWG
- Department:
- Electrical
- Product Group:
- Wire Termination
- Product Color:
- Blue
- Product Material:
- Copper
Sta-Kon RB857M – Frequently Asked Questions
1) What wire sizes does the Sta-Kon RB857M ring terminal accept?
The RB857M takes 18 to 14 AWG stranded copper wire. The blue insulation is the standard color code for that range, so a blue barrel on a panel tells the next tech what gauge is under it. If your conductor is 16 AWG it falls inside the range; 12 AWG does not, and crimping it in anyway will split the barrel.
2) What stud or screw size does the RB857M ring fit?
It is a No. 6 ring, so it goes over a #6 stud or machine screw. On a terminal block or ground lug drilled for #8 or larger the ring will sit loose and can rotate under the screw head, so match the ring size to the stud rather than forcing it.
3) Is the Sta-Kon RB857M rated for 600 volt control panel wiring?
Yes, the vinyl insulated ring terminal carries a 600 V rating and is UL listed under file E9809, which is what a panel shop or inspector wants to see on terminations inside a panelboard or control enclosure.
4) Should I use a ring terminal or a fork terminal on my terminal block?
A ring like the RB857M is the captive choice: the screw passes through a closed ring, so the wire cannot be pulled off a partly loosened screw. A fork or spade slides out sideways, which makes service faster but is the wrong call on anything that vibrates or anything safety related, like automotive or a ground connection. For wiring harness, panelboard, telecom and automotive work, the ring is the one that stays put.
5) Is the RB857M barrel copper or aluminum, and can I use it on aluminum conductors?
The barrel is copper, so it is for copper conductors only. Terminating aluminum wire in a copper-only terminal creates a dissimilar metal joint that corrodes and loosens over time; for aluminum you need a terminal marked AL or AL9CU.
6) Does the RB857M come loose or on a belt for a crimping machine?
This is the belted version, supplied on a carrier belt for feeding a semi-automatic or automatic crimp machine rather than as loose bulk pieces. If you are hand crimping one at a time in a panel, loose pieces are the easier format; if you are producing harnesses in volume, the belt is what the machine needs.
7) Is the Sta-Kon RB857M made in the USA?
Yes, country of origin on the RB857M vinyl insulated ring terminal is the United States, which matters on government and institutional jobs carrying domestic sourcing requirements.
8) Will the vinyl insulation on this ring terminal hold up in an engine bay or hot enclosure?
The RB857M uses vinyl insulation, which is the general purpose sleeve for harness, panel and automotive terminations. Vinyl is the lower temperature option in the family; where sustained heat is the concern, specify a nylon insulated ring in the same 18-14 AWG range instead.
How fast can I get the Sta-Kon RB857M 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 RB857M come with a warranty?
Absolutely. The Sta-Kon RB857M 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 RB857M?
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 RB857M from ZenSupply?
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