What is the dimension from the front of receiver to the pin hole?

The one I bought is 12 inches overall length (49120), with the center of the pin-hole being 2-1/2 inches back from the front of the receiver. I hope that helps.

Could I drill this to make it a short receiver extension? If so, what type of bit would be needed for this metal?

It is not hard metal, & can be cut & drilled with standard mettle bits & saws. The standard hitch goes all the way to the back of this short receiver. I can not imagine of any application for a 2" hitch would want it any shorter. I welded one on each side of an excavator bucket, put a 4'- 2"x2" steel in each one with wood planks across them to turn an excavator into a fork lift to shingle a roof.

What is the inside dimension?

I'm not sure of the exact I.D. but it is the same as a 2" reciever you would have on your truck. any accesory made for a 2" hitch would slide into it

Do these fit class 4 ball mounts or just class 3 ball mounts?

That depends on the structural integrity of the framing and welding to mount it on the vehicle. I'm sure that the piece itself can handle Class 4 loads (up to 10K lb.) If you can get a Class 4 ball on a 2" square bar that will plug into this, and your welding/framing is good, seems like it should be ok. But I'd suggest consulting a trailer hitch shop to be sure.

Curt Manufacturing 49060 6 in Receiver Tube 2 in X 2 in Raw Finish

Product ID: 6279592

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Details

Brand
CURT
Item Weight
1.51 Kilograms
Vehicle Service Type
Trailer
Material
Alloy Steel
Finish Type
Polished

💪1/2" reinforced collar for max strength

📏2" x 6" standard receiver size

🛠️Raw steel ready to weld

Description

🚛 Forge your own path with strength that sticks!

BUILT TO ENDURE - Crafted from premium alloy steel to handle up to 3,500 lbs of towing power.
UNIVERSAL 2 X 2 FIT - Seamlessly accepts any standard hitch accessory for ultimate versatility.
WELD READY RAW FINISH - Comes with a clean raw steel surface, primed for custom welding projects and fabrication.
PRE DRILLED CONVENIENCE - Includes a pre-drilled hole for quick, hassle-free hitch pin installation.
REINFORCED COLLAR STRENGTH - 1/2-inch collar fortifies the receiver opening for unmatched durability under stress.

The CURT 49060 is a heavy-duty 2" x 6" raw steel trailer hitch receiver tube designed for custom towing solutions. Featuring a 1/2" reinforced collar and pre-drilled pin hole, it supports up to 3,500 lbs and fits all standard 2" x 2" hitch accessories. Ready to weld right out of the box, it’s the go-to choice for DIY pros seeking reliable, versatile towing fabrication.

Specifications

Brand	CURT
Item Weight	1.51 Kilograms
Vehicle Service Type	Trailer
Material	Alloy Steel
Finish Type	Polished
Pull Force	3500 Pounds
Automotive Fit Type	Universal Fit
OEM Part Number	49060
Manufacturer	Curt Manufacturing
UPC	612314509003
Global Trade Identification Number	00612314509003
Model	Raw Receiver Tubing
Item Weight	3.32 pounds
Product Dimensions	6 x 3 x 3 inches
Item model number	49060
Is Discontinued By Manufacturer	No
Exterior	Raw
Manufacturer Part Number	49060

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