CURT X5 Gooseneck-to-5th-Wheel Adapter Plate | 16310 | For B&W Turnoverball | 20K

Convert your gooseneck hitch into a set of 5th wheel rails with the CURT X5 Gooseneck-to-5th-Wheel Adapter Plate (Part #16310). Designed for B&W (Turnoverball and compatible) gooseneck hitches — the adapter's square shank inserts into the gooseneck ball hole and locks with your hitch's existing locking mechanism. Provides industry-standard 5th wheel base rails on top to accept any rail-mount 5th wheel hitch. Rated to 20,000 lb gross trailer weight. Practically instantaneous conversion — no assembly or tools required. Backed by CURT's limited lifetime warranty.

⭐ Instantaneous Gooseneck → 5th Wheel Conversion

Standout convenience benefit vs installing dedicated 5th wheel rails: insert the shank, apply the locking mechanism, and you have a sturdy pair of 5th wheel rails. Meaningful for:

• Occasional 5th wheel towing — gooseneck as primary, 5th wheel when needed
• Buyers with an under-bed gooseneck already installed — no need to install a second setup
• Full truck bed access preserved — remove the adapter and the gooseneck hitch when not towing either
• No drilling, no permanent modifications

⭐ Multi-Point Mounting

The adapter plate features multiple mounting points that accept either 5th wheel legs or a 5th wheel roller. Meaningful compatibility with the full range of rail-mount 5th wheel hitches on the market.

Gooseneck Hitch Compatibility

This adapter is designed for B&W (Turnoverball and compatible) gooseneck hitches (square shank).

⚠️ B&W fitment note: Hitch must accept a gooseneck ball with 2" from the bottom of the shank to the center of the locking pin hole. Not compatible with shallow-hole gooseneck hitches (shank hole is 2.25" from plate surface).

Not compatible with:

• CURT OEM-style gooseneck hitches
• Turret-style pin boxes (Sidewinder, Turning Point, etc.)
• Auto-slide 5th wheel hitches

Complete CURT X5 Adapter Lineup

CURT makes X5 adapters for different gooseneck hitch types — pick the one that matches your existing GN hitch:

• #16210 — For Double Lock (round shank)
• #16220 — For Double Lock EZr (round shank)
• #16310 — For B&W Turnoverball (square shank) ⬅ THIS UNIT

Note: 16210 and 16220 both use round shanks but differ in shank length — 16210 is for standard CURT Double Lock hitches, 16220 is specifically for the CURT Double Lock EZr line. Not interchangeable.

5th Wheel Hitch Compatibility

The adapter provides industry-standard 5th wheel base rails that accept:

• All CURT rail-mount 5th wheel hitches up to 20,000 lb
• Most competitor rail-mount 5th wheel hitches up to 20,000 lb
• 5th wheel rollers

Weight capacities are limited to the lowest-rated towing component (gooseneck hitch + adapter + 5th wheel hitch).

Rugged Construction & Safety Certification

• Constructed from carbon steel
• Carbide black powder coat finish — resists rust and scratches
• Tested to SAE J2638 safety standards

Cross-Reference Part Numbers

• Part Number: 16310
• UPC: 612314163106

⚠️ Freight Note

The X5 adapter plate is a heavy, bulky item (approximately 106 lb shipping weight). May ship LTL/freight depending on carrier — please review shipping details.

Limited Lifetime Warranty

Backed by CURT's limited lifetime warranty (one-year finish, one-year parts).

Genuine CURT OEM

Key Features

• Genuine CURT OEM X5 Gooseneck-to-5th-Wheel Adapter Plate
• Part Number: 16310
• UPC: 612314163106
• ⭐ Converts gooseneck hitch to 5th wheel rails — no additional installation
• ⭐ Practically instantaneous — drop in, lock, tow
• ⭐ Multiple mounting points — accepts legs or rollers
• Gooseneck compatibility: B&W (Turnoverball and compatible)
• Shank type: Square
• Gross trailer weight capacity: 20,000 lb
• 5th wheel hitch compatibility: Industry-standard rail-mount (CURT + competitors)
• Finish: Carbide black powder coat
• Tested to SAE J2638 safety standards
• Backed by limited lifetime warranty (one-year finish, one-year parts)

Specifications

• Brand: CURT
• Part Number: 16310
• UPC: 612314163106
• Type: Gooseneck-to-5th-Wheel Adapter Plate (X5 Series)
• Gooseneck Hitch Compatibility: B&W (Turnoverball and compatible)
• Shank: Square
• Gross Trailer Weight Capacity: 20,000 lb
• Mounting Points: Multiple (accepts 5th wheel legs or roller)
• Finish: Carbide black powder coat
• Approximate Shipping Weight: 106 lb
• Safety Standard: SAE J2638 tested
• Warranty: Limited lifetime (one-year finish, one-year parts)