At a Glance

> Coupler Included: Includes one RAM CTA-400-Z adjustable channel mount coupler.
> Hardware Included: Includes two 5/8"-11 x 4-3/4" Grade 8 yellow zinc hex cap screws, four 5/8" washers, and two 5/8"-11 Grade 8 nylon insert lock nuts.
> Bracket Note: Adjustable channel bracket is sold separately and is not part of this kit.
> Bracket Check: Confirm your trailer has the correct adjustable channel bracket for the CTA-400-Z coupler.
> Hardware Check: This kit uses 5/8"-11 mounting hardware with Grade 8 bolts and Grade 8 nylon insert lock nuts.
Brand: Need a Trailer Part
SKU: CTA-400-Z-KIT

Before You Order

Match the part number, measurements and connection points that apply to your trailer.

Connection	Confirm ball or lunette size.
Mount	Verify tongue, channel and mounting pattern.
Capacity	Meet or exceed the required rating.

Product Details

Adjustable Trailer Coupler Kit / Hardware Included

RAM CTA-400-Z-KIT 2-5/16" Adjustable Channel Mount Trailer Coupler Kit with Hardware

RAM adjustable channel mount trailer coupler kit built around the CTA-400-Z coupler, paired with the 5/8" Grade 8 mounting hardware needed for the coupler-to-channel installation. Adjustable channel bracket sold separately.

SKU: CTA-400-Z-KIT 2-5/16" Ball Hardware Included

Overview

The CTA-400-Z-KIT is a complete R&P-curated RAM adjustable channel mount coupler kit for customers who need the CTA-400-Z coupler plus the proper 5/8" mounting hardware in one package. The kit includes the zinc-plated RAM 2-5/16" adjustable channel mount coupler, two Grade 8 mounting bolts, four thru-hardened washers, and two Grade 8 nylon insert lock nuts. The adjustable channel bracket is not included.

R&P Service Insight

Adjustable channel couplers often get ordered without the correct mounting hardware. This kit solves that problem by packaging the RAM coupler with the matching Grade 8 bolt, washer, and lock nut setup for the coupler mounting points.

Coupler Included: Includes one RAM CTA-400-Z adjustable channel mount coupler.
Hardware Included: Includes two 5/8"-11 x 4-3/4" Grade 8 yellow zinc hex cap screws, four 5/8" washers, and two 5/8"-11 Grade 8 nylon insert lock nuts.
Bracket Note: Adjustable channel bracket is sold separately and is not part of this kit.

R&P Knowledge Hub

Compatibility: Built for adjustable channel mount trailer coupler applications using the RAM CTA-400-Z coupler and 5/8" mounting hardware.

Vehicle / System Fit: Intended for trailers using adjustable channel-style coupler mounting where the coupler, ball size, bolt size, and bracket dimensions match.

Installation Notes: Confirm your adjustable channel bracket, hole spacing, mounting width, coupler rating requirements, ball size, and hardware fit before installation.

Performance Insight: Including the hardware helps keep the coupler installation consistent by matching the 5/8" Grade 8 bolt, washer, and nylon lock nut set to the coupler mounting points.

Brand & Fitment Note

Selling Brand: R&P Carriages curated kit using RAM coupler CTA-400-Z and listed mounting hardware.

Application Reference: RAM and CTA-400-Z describe the included coupler component. Fitment depends on your trailer channel bracket, ball size, mounting holes, and installation requirements.

What This Means: This listing is for the CTA-400-Z-KIT, which includes one RAM CTA-400-Z coupler plus the listed 5/8" mounting hardware. It is not a channel bracket kit.

Before Ordering: Verify bracket compatibility, coupler rating requirements, 2-5/16" ball size, 5/8" mounting hardware needs, and included components before installation.

R&P Repair Insight

When replacing an adjustable coupler, do not assume the old hardware is reusable. Rust, thread wear, stretched bolts, damaged nuts, or mismatched washers can compromise the installation. This kit includes fresh mounting hardware for the coupler connection.

Bracket Check: Confirm your trailer has the correct adjustable channel bracket for the CTA-400-Z coupler.
Hardware Check: This kit uses 5/8"-11 mounting hardware with Grade 8 bolts and Grade 8 nylon insert lock nuts.
Final Check: Torque and inspect according to your trailer/coupler installation requirements before towing.

Features

Complete Coupler Hardware Kit

Includes the RAM CTA-400-Z coupler plus the listed Grade 8 mounting bolts, washers, and nylon insert lock nuts.

2-5/16" Ball Coupler

Coupler is designed for 2-5/16" trailer ball applications where the trailer setup matches the coupler and mounting configuration.

Zinc-Plated Coupler Finish

RAM CTA-400-Z coupler is listed with a zinc-plated finish for corrosion resistance in normal trailer service conditions.

Adjustable Channel Mount Design

Designed for adjustable channel mount installations; adjustable channel bracket is sold separately.

Specifications

Specification	Detail
Kit SKU	CTA-400-Z-KIT
Base Coupler	RAM CTA-400-Z
Product Type	Adjustable channel mount trailer coupler kit with hardware
Ball Size	2-5/16"
Mount Style	Adjustable channel mount, 2-bolt mount
Finish	Zinc plated coupler; yellow zinc mounting hardware
Hardware Size	5/8"-11 mounting hardware
Channel Bracket	Sold separately

Fitment / Application

Category	Details
Vehicle / System	Trailer adjustable channel coupler system
Primary Fit	Trailer applications requiring a RAM CTA-400-Z adjustable channel mount coupler with 2-5/16" ball size
Hardware Fit	Includes 5/8"-11 Grade 8 mounting bolts, washers, and nylon insert lock nuts
Notes	Verify channel bracket compatibility, ball size, coupler rating requirement, bolt fit, and installation requirements before ordering. Adjustable channel bracket is not included.

Included Components

Quantity	Item
1	RAM CTA-400-Z adjustable channel mount trailer coupler, 2-5/16" ball, zinc plated
2	5/8"-11 x 4-3/4" Grade 8 yellow zinc finish hex cap screws / bolts
4	5/8" x 1.312" OD thru-hardened yellow zinc finish steel washers
2	5/8"-11 Grade 8 yellow zinc finish nylon insert lock nuts
Not included	Adjustable channel bracket

Verify your trailer channel bracket, 2-5/16" ball requirement, coupler rating requirement, mounting hole fit, hardware fit, and installation requirements before use. This kit includes the RAM CTA-400-Z coupler and listed mounting hardware only; adjustable channel bracket is sold separately.

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RAM 2-5/16" Adjustable Channel Mount Trailer Coupler - 16,000 lbs - Zinc Finish (CTA-400-Z-KIT)