CURT MANUFACTURING, LLC. part description

When you demand more from your towing equipment, CURT class 4 ball mounts answer the call. Our heavy-duty ball mounts are constructed from quality steel and feature a 2" x 2" shank. They are built to complement CURT class 4 trailer hitches and are perfect for towing large boat trailers, RVs, livestock and horse trailers as well as a variety of other farm and industrial-type trailers (NOTE: Never exceed the lowest weight capacity of any towing component; i.e. the vehicle, hitch, trailer, etc). With a few different drop height options and the ability to flip for optional rise, CURT class 4 ball mounts are built to work as hard as you do, from sunup to sundown. This class 4 ball mount has a gross trailer weight capacity of 12,000 lbs. and tongue weight rating of 1,200 lbs. It has a standard drop of 2" or can be flipped to provide 1" of rise. It also features a solid shank for maximum strength. As with most of our ball mount line, CURT class 4 ball mounts are CNC-formed, robotically welded and mechanically descaled to create a flawless product. We finish our heavy-duty ball mounts in a gloss black powder coat to give them superior rust, chip and UV resistance. They also come with 1 1/4" ball hole to accept a trailer ball with a 1 1/4" shank.


  • Fits trailer hitches with a 2" x 2" receiver tube opening
  • Equipped with a 1 1/4" hole to accept a trailer ball shank
  • 4" drop or 3" rise for precise trailer leveling
  • Shank constructed from solid steel for optimum strength
  • CNC-formed, robotically welded and mechanically descaled for a perfect fit
  • Protected by a durable powder coat finish
  • Made in USA

BALL MOUNT, 2" DROP, SOLID SHANK, 12,000 LB

Product Description

Class 4 Ball Mount (2" Shank, 12,000 lbs., 2" Drop, 9-3/8" Long)

Application Summary

CURT 45312 Class 4 Trailer Hitch Ball Mount, Fits 2-Inch Receiver, 12,000 lbs, 1-1/4-Inch Hole, 2-In Drop, 1-Inch Rise

Shank constructed from solid steel for optimum strength

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Product Attributes

Box Height In Inches - Xa 0
Box Length In Inches - Xa 0
Box Width In Inches - Xa 0
Class Id 0
Color Black
Drop 2 IN
Finish - Xa Gloss Black Powder Coat
Gross Trailer Weight (gtw) 12,000 LB
Item Class - Xa OMF
Item Height - Xa 3.250
Item Length - Xa 14.375
Item Width - Xa 3.500
Parcel Allowed - Xa Yes
Product Weight - Xa 0.000
Rate Class - Xa 70.0
Receiver Tube Size 2 IN
Retail Height - Xa 3.250
Retail Length - Xa 14.375
Retail Width - Xa 3.500
Rise 1 IN
Shipping Weight - Xa 15.250
Tariff 301 - Xa No
Tongue Weight (tw) 1,200 LB
Warranty Limited Lifetime Warranty (One-Year Finish, One-Year Parts)

Additional Information

Country of Origin (Primary) US
Harmonized Tariff Code (Schedule B) 8708998180
Harmonized Tariff Code (HTS) 8708998180
NAFTA Preference Criterion Code B
Refurbished Part N
Remanufactured Part N
Warranty Special Limited Lifetime Warranty (One-Year Finish, One-Year Parts)
Warranty Special UOM TX
UPC 00612314453122

Curt®, a Lippert brand, is a leading manufacturer and supplier of a full line of towing products, including heavy-duty equipment. It also offers fifth wheel, gooseneck, weight distribution hitches, ball mounts, trailer balls, electrical components, bike racks, cargo carriers, and other towing accessories. Headquartered in Eau Claire, Wisconsin, Curt Manufacturing, LLC. has come a long way since it was founded as a trailer ball distribution business in 1993. Two years after its founding, it began manufacturing its own first custom-fit receiver hitch, which was soon followed by countless more. Today, Curt remains the FIRST Name in Towing Products® with over a thousand trailer hitch designs for everything, from vans and passenger cars to SUVs and full-size pickups.

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