Does anyone know what the "usable" length is?

They are designed to be have 2" clear between the head of the bolt and the wire retainer when the retainer is in its natural position. The claims that 2 3/8" are usable should be qualified with warnings that the retainers will be sprung or stretched outward, and perhaps prone to popping open. The intended use is for 2" or less diameter tubing.

does this work as a pin to hold extender in place??

these pins are not meant to have any real force on them

How do you open and close it?

Just pull the bracket end that is open (not attached to the pin) out just far enough to clear the pin and pull it to any side. Put the pin in the item you want and again just pull the bracket out far enough to clear the pin and place the open end of the bracket over the pin. It will spring back to its origiinal shape.

What is the sheer rating for this pin?

There is none since all it is meant to do is to hold the coupler down onto the ball. There is no stress on it.

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CURT 25080 Trailer Coupler Pin, 1/4-Inch Diameter x 2-3/4-Inch Long

CURT 25080 Trailer Coupler Pin, 1/4-Inch Diameter x 2-3/4-Inch Long

Product ID: 380622247

Details

Brand
CURT
Item diameter
0.25 Inches
Material
Carbon Steel
Pin type
1/4"
Size
Pack of 1

📏1/4-inch diameter x 2-3/4-inch length

🛠️Zinc-plated corrosion-resistant finish

🛡️Solid steel for high strength & safety

B/.55

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In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔒 Lock in your adventure with CURT’s unshakable trailer coupler pin!

RUST NOT HERE - Durable zinc plating guards against corrosion, keeping your pin reliable mile after mile.
COMPACT YET MIGHTY - Perfectly sized at 1/4" diameter and 2-3/4" length for strength without bulk.
ROCK SOLID SECURITY - Solid steel pin locks your trailer coupler latch tight, ensuring safe, worry-free towing.
EFFORTLESS OPERATION - Spring steel square retainer clip snaps on easily—no fumbling, no rattling, just secure.
UNIVERSAL FIT ZERO HASSLE - Fits a wide range of trailer couplers, jacks, and pintle hooks for ultimate versatility.

The CURT 25080 Trailer Coupler Pin is a robust, 1/4-inch diameter by 2-3/4-inch long solid steel pin designed to securely lock trailer coupler latches. Featuring a corrosion-resistant zinc-plated finish and a spring steel retainer clip, it offers versatile compatibility with various trailer types and ensures reliable, rust-free performance for safe towing.

Specifications

ASIN	B001GN3H5A
Best Sellers Rank	#45,014 in Automotive ( See Top 100 in Automotive ) #24 in Automotive Hitch Clips & Pins
Brand	CURT
Color	CLEAR ZINC
Customer Reviews	4.8 4.8 out of 5 stars (6,719)
Fastener Type	Coupler Pin
Finish Types	Zinc Plated
Global Trade Identification Number	00612314110803
Grade Rating	Industrial
Included Components	1 COUPLER SAFETY PIN 1/4 IN DIA X 3 IN
Item Diameter	0.25 Inches
Item Dimensions	10.2 x 10.2 x 2.5 centimeters
Item Type Name	Trailer Coupler Pin, 1/4-Inch Diameter x 2-3/4-Inch Long
Item Weight	0.05 Pounds
Manufacturer	Curt Manufacturing
Material Type	Carbon Steel
Model	25080
Number Of Items	1
Number of Pieces	1
Outside Diameter	0.25 Inches
Part Number	25080
Pin Type	1/4"
Screw Head Style	Square
Size Name	Pack of 1
UPC	612314110803
Unit Count	1 Count

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