Sta-Kon Vinyl Insulated Female...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$828.57
Sta-Kon RB257 INS VINYL FEM 250 DISC No16-14 BLU

Sta-Kon Vinyl Insulated Female Disconnect 0.250 Tab 16-14 AWG Blue, 1000 Pack

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Model: RB257
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$828.57
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Sta-Kon Vinyl Insulated Female Disconnect 0.250 Tab 16-14 AWG Blue

Professional Wire Termination for Reliable Electrical Connections

The Sta-Kon Vinyl Insulated Female Disconnect delivers dependable wire termination performance for 16-14 AWG applications with 0.250 tab compatibility. Featuring durable brass construction with blue vinyl insulation, this disconnect provides secure electrical connections for professional installations and maintenance applications.

Professional Features & Benefits

  • 16-14 AWG Wire Range: Accommodates standard wire gauges for versatile electrical connection applications
  • 0.250 Tab Compatibility: Standard disconnect size ensures broad compatibility with electrical components and terminals
  • Brass Construction: Provides excellent conductivity and corrosion resistance for long-term reliability
  • Vinyl Insulation: Blue vinyl material offers electrical insulation and color coding for circuit identification
  • UL Listed: UL E66716 certification ensures compliance with electrical safety standards
  • USA Manufacturing: Domestic production supports quality control and reliable supply chain

Technical Specifications

  • Color: Blue
  • Country Of Origin: United States (US)
  • Department: Electrical
  • Insulation Material: Vinyl
  • Material: Brass
  • Product Group: Wire Termination
  • Product Subgroup: Disconnects
  • Product Type: Vinyl Insulated Female Disconnect
  • Standards: UL E66716

Professional Applications

  • Electrical Panel Connections
  • Control Circuit Wiring
  • Equipment Terminal Connections
  • Maintenance and Repair Applications
  • Industrial Electrical Systems
  • Commercial Building Wiring

Why Choose Sta-Kon Quality?

Sta-Kon delivers proven reliability in wire termination solutions with UL listed components manufactured in the United States. The brass construction and vinyl insulation provide durability and safety for professional electrical applications, ensuring dependable performance in demanding environments.

Manufacturer Resources

Product Specs

Country Of Origin:
United States (US)
Insulation Material:
Vinyl
Product Subgroup:
Disconnects
Product Type:
Vinyl Insulated Female Disconnect
Standards:
UL E66716
Department:
Electrical
Product Group:
Wire Termination
Product Color:
Blue
Product Material:
Brass

Sta-Kon RB257 – Frequently Asked Questions

1) Will a Sta-Kon RB257 female disconnect fit a 1/4 inch male tab?
Yes. The RB257 is a female disconnect sized for a 0.250 inch (1/4 inch) male tab, which is the most common tab width on contactors, relays, switches and appliance terminals. It slides onto the tab, so no screw terminal or ring lug prep is needed.
2) What wire sizes can I crimp into the blue Sta-Kon RB257 disconnect?
It takes 16 to 14 AWG. The blue vinyl insulation is the standard color code for that range, so on a job where you are also running 22-18 AWG (red) or 12-10 AWG (yellow), the blue barrel tells you at a glance you have the right size in hand. Stranded control and equipment wire in 16 or 14 AWG crimps into it directly.
3) Is this disconnect UL listed for use in a control panel?
The Sta-Kon vinyl insulated female disconnect carries UL file E66716. That is the compliance reference a panel shop or AHJ inspector will want when the terminal is used in control circuit wiring or equipment terminations.
4) Should I use a female disconnect or a ring terminal on equipment connections?
Use the female disconnect where the device already has a 0.250 male tab and you want the lead to come off without tools, which is typical of contactors, limit switches, blower motors and appliance terminals. A ring terminal is the right choice on a screw or stud terminal where the connection must stay captive under vibration. The RB257 is the quick-disconnect side of that decision for 16-14 AWG.
5) Is the barrel on this Sta-Kon disconnect brass or steel?
Brass. That matters for two reasons on an MRO shelf: brass carries current with low resistance and holds up better than plated steel in damp or mildly corrosive panel environments, so the crimp stays sound over time.
6) Is the Sta-Kon RB257 made in the USA for a Buy American spec job?
Country of origin is the United States. On federal, municipal, education and healthcare work carrying a domestic-content requirement, that lets the RB257 go into the submittal without a sourcing waiver.
7) Will the vinyl insulation on this disconnect handle heat near a motor or heater?
The insulation is vinyl, which is the standard sleeve for general panel and control wiring. Vinyl is not a high-temperature material, so for terminations sitting against heating elements, furnace plenums or motor windings, specify a nylon-insulated or uninsulated disconnect with heat shrink instead. For panel interiors, control circuits and ordinary equipment terminals, the vinyl barrel is what is normally used.
8) Do I need a special crimper for the Sta-Kon RB257, or will a general insulated terminal crimper work?
An insulated-terminal crimper with the blue 16-14 AWG nest is what this calls for. Match the die to the color band, not the barrel diameter by eye, and the crimp compresses the brass barrel through the vinyl sleeve without cutting it. A bare-terminal or coax die will deform the insulation and give an unreliable pull-out.
9) Is the 1000 pack of these female disconnects practical for a maintenance shop, or is it a panel-shop quantity?
Sold as a 1000 piece pack of one part number, RB257, in 16-14 AWG blue. That is a stocking quantity rather than a job box count, which suits a panel builder, a facility MRO crib, or a contractor standardizing all 16-14 AWG quick-disconnect terminations on a single part so the bins do not get mixed.
How fast can I get the Sta-Kon RB257 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 RB257 come with a warranty?
Absolutely. The Sta-Kon RB257 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 RB257?
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 RB257 from ZenSupply?
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