What is the outside diameter of the threads for this connector? I am looking for a fitting to install in a 7/8” hole.

Nope! They will not work! they are quite literally 1/2 inch. the 7/8 hole needs a 7/8 fitting. 7/8 is an odd measurement but my outlet(Hubbell 250v) claims "1/2 " knock out" but it, in fact is not. in fact I had to return these! get a box of grommets of varying sizes and you will come out with at least some of them correct!

how many 12/2 cables can go through each of these clamps?

I used these for a 12/3 which they worked well for. It would be possible to get two 12/2s through the opening, but tightening it down with the screws would be difficult as the screws are barely long enough for the extreme opening.

does it fit a Romex 6/3?

This connector may be too small/tight to fit 6/3 WG Romex. If it was me, I would use a 3/4 “ ROMEX Connector…

Are these supposed to actually be 1/2 trade size as listed? I see a few people getting 3/8 in reviews.. is that fixed?

These connectors fit in a 1/2” knock out on a emt 1900 box, hope that’s helpful..

Raco 2711b5 Connector Squeeze Nmsc Cable 1 2 Inch Zinc

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Description

🔧 Connect with confidence—where durability meets precision.

VALUE PACKED 5 PACK - Stock up and save with a reliable bundle trusted by thousands of pros and DIYers alike.
CERTIFIED SAFETY ASSURANCE - UL and CSA listings guarantee compliance with top industry safety standards—work confidently.
PRECISION SQUEEZE TERMINAL - Smooth threading ensures a secure, hassle-free connection every time—no stripped threads here.
VERSATILE NMSC COMPATIBILITY - Fits multiple wire gauges (#14 to #10) with or without ground, perfect for diverse electrical projects.
RUGGED ZINC DIE CAST DURABILITY - Engineered to withstand harsh conditions and protect your wiring with premium corrosion resistance.

The Hubbell-Raco 2711B5 is a 1/2-inch zinc die-cast squeeze connector designed for secure, corrosion-resistant connections of Nonmetallic Sheathed Cable (NMSC) in dry locations. UL and CSA listed, it supports multiple wire gauges and offers smooth threading for easy installation. Sold in a convenient 5-pack, it’s a trusted choice for professional-grade electrical projects.

Specifications

ASIN	B00NLOKBAQ
Best Sellers Rank	#65,658 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #79 in Electrical Conduit Fittings
Brand Name	RACO
Color	Gray
Connector Type	Squeeze
Contact Material	Zinc
Customer Reviews	4.8 4.8 out of 5 stars (1,237)
Global Trade Identification Number	00050169914915
Included Components	NMSC Cable Connector
Insulation Material Type	Nylon
Item Dimensions L x W x H	12.2"L x 10.8"W x 5.95"H
Item Weight	2.4 ounces
Manufacturer	Hubbell
Material Type	Copper
Maximum Voltage	120 Volts (AC)
Model	2711B5
Specification Met	UL
Stud Size	1/2
Temperature Rating	221 degree fahrenheit
Terminal	Squeeze
UPC	050169914915
Unit Count	5.0 Count

Reviews

B**Z

Good value

UL listed at a great value. What more can a consumer ask for? They work great and the threads are smooth.

27.12.2023

S**Y

Good connectors great price

Great priced romex connectors

2.11.2025

K**D

Durable and as described

Good quality material and as described

5.04.2026

D**N

Fast Shipping!

Okay

28.11.2024

D**W

works good

clamps wire securely

8.12.2024

B**D

Quality

I have used these for years and always quality.

9.07.2024

F**S

They did their job

Pretty good

25.06.2025

V**S

Pricey, but worked well

Acceptable quality. Worked well.

10.01.2024

A**L

Works as expected

15.12.2025

G**S

They were perfect for the octaganl junction boxes.

21.09.2025

C**S

they worked

22.02.2026

M**L

These worked exactly as expected and is a good value. Clamps open and close easily and seem solid

11.06.2024

N**G

small profile to fit in control panels

1.12.2023

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RACO 2711B5 Connector, Squeeze, NMSC Cable, 1/2-Inch, Zinc, 5-Pack

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