CURT A20 Sliding 5th Wheel Hitch | 16631 | 20K | Includes Rails

The CURT A20 Sliding 5th Wheel Hitch (Part #16631) combines the premium A-Series A20 hitch head with the CURT S20 5th wheel slider — providing turn clearance for maneuvering. Configuration: Includes Rails. A20 head + S20 slider + universal base rails (brackets sold separately) Rated to 20,000 lb GTW / 5,000 lb vertical. Sidewinder pin box compatible. CURT limited lifetime warranty.

The CURT A20 Series — Premium 20K 5th Wheel Hitch

The CURT A-Series is CURT's premium 5th wheel hitch line — engineered with patented articulating head geometry, interlocking dual-jaw design, and self-resetting handle operation. The A20 is the 20,000 lb capacity variant — the step up from the A16 for larger 5th wheels, mid-size toy haulers, and heavier commercial trailers. Meaningful highlights:

• 20,000 lb gross trailer weight (GTW) — handles larger 5th wheel RVs, toy haulers, and heavier commercial trailers
• 5,000 lb vertical load capacity — 1,000 lb more than A16, meaningful for larger trailers with heavier pin weights
• ⭐ Patented articulating torsion head (Patent #8,827,298) — cast yoke with poly-torsion inserts suppresses shock loads and reduces noise
• ⭐ Self-resetting single-throw handle — pull once to couple/uncouple; handle automatically returns to ready-to-couple position after uncoupling
• ⭐ High-strength interlocking dual jaws — fully wrap the kingpin for minimal movement and noise
• ⭐ Three-position color-coded coupling indicator — red (uncouple) / yellow (couple) / green (tow) — visible from the truck cab
• ⭐ Extra-wide head opening — makes coupling easier, especially in low-visibility conditions
• ⭐ Sidewinder pin box compatible — approved for use with Sidewinder-style turret pin boxes
• Four height adjustment settings (13"–17" range)
• Carbide black powder coat finish
• Backed by CURT's limited lifetime warranty (one-year finish, one-year parts)

⭐ CURT S20 Slider — True Rolling Design

Standout slider engineering vs competitor units:

• True rolling design — S20 rolls on wheels that bear the trailer weight, rather than sliding on hollow rods (as seen in many competitor models)
• ~12" of rearward displacement (competitors often only offer 10")
• Thick operating handle — smooth roll forward/back operation
• Locks securely into each position (extended and retracted)

Configuration Details

Configuration: Includes Rails

A20 head + S20 slider + universal base rails (brackets sold separately)

All A20 Sliding & Kit Options

• #16531 — Sliding, universal rails ($1292.95)
• #16631 — Sliding, rails included ($1416.95) ⬅ THIS UNIT
• #16077 — Ram 2500/3500 Kit ($1817.95)
• #16682 — Chevy/GMC/Ford HD Kit ($1768.95)

Prefer Fixed-Position Puck Fit?

• #16034 — Ford F-250/F-350/F-450 SD ($1357.95)
• #16044 — Ram 2500/3500 ($1507.95)
• #16064 — Silverado/Sierra 2500/3500 HD ($1252.95)
• #16092 — Silverado/Sierra 2500/3500 HD ($1309.95)
• #16074 — Nissan Titan XD ($1424.95)

Just the A20 Base Configurations?

• #16540 — Hitch Head Only ($622.95)
• #16140 — Industry-standard (rails sold separately) ($999.95)
• #16141 — Rails included ($1027.95)

A20 vs A16 — When to Step Up

The A20 and A16 share the same premium A-Series head design (articulating torsion, dual jaws, self-resetting handle, 3-position indicator, Sidewinder compatible). Meaningful A20 upgrades over A16:

• 20,000 lb GTW vs A16's 16,000 lb — handles heavier trailers
• 5,000 lb vertical load capacity vs A16's 4,000 lb — meaningful for larger 5th wheels with heavier pin weights
• Same puck-system compatibility as A16 — uses the same puck legs (#16025, #16029, etc.) so upgrade paths are straightforward

Choose A20 if your trailer's GTW or pin weight is close to or above the A16's ratings. For a typical 32'–40' 5th wheel with a loaded pin weight over 3,500 lb, A20 provides meaningful headroom.

Need Even Higher Capacity?

The A20 is capped at 20,000 lb GTW. For larger 5th wheels and heavy toy haulers, CURT offers:

• A25 (25K) — 25,000 lb GTW / 6,250 lb vertical load
• A30 (30K) — Maximum A-Series capacity for luxury 5th wheels and heavy toy haulers
• PowerRide (30K) — CURT's flagship — multi-directional head, strategic grip points, self-resetting handle

Each higher-capacity variant is available for the same puck-system trucks and universal industry-standard base rails.

Load Ratings

• Gross Trailer Weight (GTW): 20,000 lb
• Vertical Load Capacity: 5,000 lb

Cross-Reference Part Numbers

• Part Number: 16631
• UPC: 612314051045
• Patent: #8,827,298

⚠️ Professional Installation Recommended

Sliding 5th wheel hitch assemblies are heavy and require proper mounting/anchor torque. Installation should be performed by a qualified installer.

Limited Lifetime Warranty

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

Genuine CURT OEM

Key Features

• Genuine CURT OEM A20 Sliding 5th Wheel Hitch
• Part Number: 16631
• UPC: 612314051045
• ⭐ CURT S20 slider — true rolling design, ~12" displacement
• ⭐ Patented articulating torsion head
• ⭐ Self-resetting single-throw handle
• ⭐ Interlocking dual jaws
• ⭐ 3-position color-coded indicator
• ⭐ Sidewinder pin box compatible
• Configuration: Includes Rails
• Gross trailer weight: 20,000 lb
• Vertical load capacity: 5,000 lb
• Backed by CURT's limited lifetime warranty

Specifications

• Brand: CURT
• Part Number: 16631
• UPC: 612314051045
• Product Line: A20 (A-Series Premium)
• Type: 5th Wheel Sliding Hitch
• Patent: #8,827,298
• Configuration: Includes Rails
• Slider: CURT S20 (true rolling, ~12" displacement)
• Gross Trailer Weight (GTW): 20,000 lb
• Vertical Load Capacity: 5,000 lb
• Head Design: Cast yoke with poly-torsion inserts, fully articulating
• Jaw Design: High-strength interlocking dual jaws
• Handle: Lockable single-throw, self-resetting
• Coupling Indicator: 3-position color-coded
• Pin Box Compatibility: Standard + Sidewinder
• Height Adjustment: 4 positions (13"–17" range)
• Finish: Carbide black powder coat
• Warranty: Limited lifetime (one-year finish, one-year parts)