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Manufacturer Resources
Product Specs
- Country Of Origin:
- United States (US)
- Product Subgroup:
- General Terminals
- Product Type:
- Vinyl Insulated Locking Fork 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 RB2257M – Frequently Asked Questions
1) What wire gauge does the Sta-Kon RB2257M fork terminal take?
The RB2257M locking fork terminal is sized for 18 to 14 AWG stranded conductor. The blue insulation is the standard color code for that range, so a tech can identify it in a bin without reading the barrel. Anything heavier than 14 AWG will not seat in the barrel and will not crimp reliably.
2) Will this Sta-Kon fork terminal fit a #10 screw terminal on a contactor or terminal block?
Yes. The RB2257M is built for a No. 10 stud or screw, which is the common size on contactor terminals, strip blocks, and control panel lugs. The fork is a locking type, so once the screw is snugged the tangs resist backing off the stud under vibration rather than sliding out like a plain spade.
3) Can I use the RB2257M on 480V control wiring?
The terminal is rated 600 V, so 480 V control and motor circuits are inside its rating. It carries a UL file reference of E9809.
4) Is the Sta-Kon RB2257M a copper terminal or plated steel?
Copper is the base metal on this terminal, which is what you want for a low-resistance connection on control and power circuits. The insulation is vinyl with a Mylar sleeve over the barrel.
5) Should I use a locking fork terminal or a ring terminal on a panel landing?
A locking fork like the RB2257M goes on and off a No. 10 screw without removing the screw entirely, which is why panel builders and controls techs prefer it for terminal strips they expect to service. A ring terminal is the better choice where code or spec requires a fully captive connection, since the screw has to come all the way out to release it. The locking tangs on the fork close the gap on vibration resistance but do not make it captive.
6) Do I need a special crimper for Sta-Kon insulated terminals?
Insulated barrel terminals in the 18-14 AWG range crimp with a standard insulated-terminal tool on the blue die position. Use the die that matches the blue color code; an uninsulated or non-insulated die will cut the vinyl and Mylar sleeve instead of forming the barrel properly.
7) Where is the Sta-Kon RB2257M made?
Manufactured in the United States, which matters on federal, military, and other Buy American specified jobs where domestic origin has to be documented on the submittal.
How fast can I get the Sta-Kon RB2257M 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 RB2257M come with a warranty?
Absolutely. The Sta-Kon RB2257M 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 RB2257M?
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product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Sta-Kon RB2257M from ZenSupply?
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