This is the sliding Companion for a truck running B&W's under-bed Turnoverball system. The post on the base drops into the 4" hole in the bed, a lever in the wheel well pins it, a drawdown bolt pulls it tight, and then it slides back 12" for tight turns. Rated at 20,000 lb gross trailer weight with 5,000 lb of vertical pin weight, and when the hitch comes out the bed is completely flat. It mounts to a single point, which is why the bed is clean when the hitch is out: there are no rails and nothing above the bed floor except the one 4" hole.
What's Included:
Companion coupler head with machined wrap-around jaws (RVC3006)
Sliding base (RVB3405)
Pins, hairpins and mounting hardware
B&W installation instructions
Features
20,000 lb Gross Trailer Weight, 5,000 lb Vertical Pin Weight B&W rates this hitch at 20,000 lb gross trailer weight with 5,000 lb vertical pin weight. Those are the hitch's numbers. What you can actually tow is the lowest of the hitch rating, your truck's own fifth wheel rating on the door jamb, and, on a rail-mounted hitch, the rails underneath it. The coupler head on this hitch, RVC3006, is itself rated to 25,000 lb; on this model the 20,000 lb figure comes from the base, which is why B&W sells 20K and 25K versions of the same-looking hitch.
Machined Wrap-Around Jaws The jaws are 1" thick and they wrap the king pin for full contact all the way round rather than gripping it at two points. That is what stops the chucking you feel through the cab when a loose coupler lets the trailer take up slack every time you lift off. B&W machines the jaws to the pin instead of relying on a wedge.
Cam-Action Handle That Releases on Uneven Ground A cam in the handle takes the bind out of uncoupling. Open the handle and the cam moves aside so the jaws can release as you pull away; close it and the cam blocks the jaw from opening at all. The practical benefit shows up on a sloped campsite, where a conventional handle can jam solid under load.
Shock Absorber and Polyurethane Bushings The whole coupler rides on polyurethane bushings, with a shock absorber taking the side-to-side movement instead of letting it slam. B&W set out to build the smoothest-riding fifth wheel hitch in the industry, and this is the part of the design that does it.
12" of Slide for Short-Bed Turning The base slides back 12" and locks there, which buys the trailer nose room to clear the back of the cab in a tight turn. Use it for maneuvering at low speed only and tow in the forward locked position: with the hitch back, the pin weight sits behind the rear axle and the truck handles differently.
Gooseneck and Fifth Wheel from One System Because this hitch mounts to B&W's under-bed Turnoverball system, the same installation pulls a gooseneck trailer as well: turn the ball back over and hook to a ball, or drop the Companion in and hook to a king pin. One hole in the bed, two kinds of trailer.
Two Pieces, So One Person Can Handle It The coupler lifts off the base without tools by pulling up on the saddle handles. That turns a hitch too heavy to shift in one go into two manageable pieces, which matters every time you take it out of the bed for the week.
Built and Tested in Kansas Made in the USA, built by B&W in Humboldt, Kansas. B&W's own testing goes past what SAE J-2638 asks for: rather than using a fresh sample for each test, it puts a single hitch through all three 300,000-cycle dynamic tests and the six static tests in sequence.
Fitment & Compatibility
Requirement
Detail
Mounting system
● B&W Turnoverball under-bed system, sold separately as a vehicle-specific GNRK kit
Attachment
● One 4" hole in the bed floor. The base post drops in, a lever in the wheel well pins it, a drawdown bolt tightens it
Rails
✗ Not used and not compatible. This hitch does not mount to fifth wheel rails
Bed when not towing
● Completely flat. Nothing stands above the bed floor once the hitch is lifted out
Also tows
● A gooseneck trailer, from the same mounting system, by turning the Turnoverball back over
Fit guidance: This hitch mounts to a single point in the bed and needs a B&W Turnoverball under-bed mounting system to mount to. That system is vehicle-specific and is sold separately as a GNRK kit for your year, make and model, so order it at the same time if your truck does not already have one. What it buys you is a truck that pulls a gooseneck and a fifth wheel from the same hole and has a completely flat bed the rest of the week. Those are the hitch's numbers. What you can actually tow is the lowest of the hitch rating, your truck's own fifth wheel rating on the door jamb, and, on a rail-mounted hitch, the rails underneath it.
Specifications
B&W Part Number: RVK3405
Series: Companion
Gross Trailer Weight: 20,000 lb
Vertical Pin Weight: 5,000 lb
Mounting System: B&W Turnoverball under-bed mounting system, single point
Base Type: Sliding, 12" of travel
Coupler Head: RVC3006, 1" thick machined wrap-around jaws, fully articulating front to back and side to side
Base Part Number: RVB3405
Handle: Cam-action latching handle
Vibration Control: Shock absorber plus polyurethane bushings
Finish: Powder coat
Rails Required: No
Shipping Weight: About 305 lb
UPC: 843233004779
Warranty: B&W Lifetime Exclusive Limited Warranty
Made In: Humboldt, Kansas, USA
Installation
Type: Base post drops into the bed hole of a B&W under-bed mounting system, latch and tighten the drawdown bolt · Time: About 15 to 30 minutes once the mounting system is in the truck · Tools: None for the hitch itself beyond the drawdown bolt wrench, plus a second person or a hoist for the lift · Difficulty: Straightforward, but heavy
Work from B&W's RVK3405 installation sheet in the Resources tab. The assembled hitch is about 305 lb, so lift it in two pieces: the coupler comes off the base by pulling up on both saddle handles, and each half is manageable on its own. Grease the polyurethane bushings on the pivot arms before setting the coupler down, check the pins and hairpins are all home, and do a pull test with the trailer wheels chocked and the landing gear down before you take it on the road.
Watch the installation walkthrough:
Warranty, Shipping & Returns
Warranty. B&W backs this product with its Lifetime Exclusive Limited Warranty: for the original consumer, and for as long as you own the product, B&W warrants it against defects in material and workmanship. B&W's remedy is replacement, or at B&W's option repair or a refund of the purchase price. Installation, removal and shipping costs are not covered, and B&W requires a return authorization (800-248-6564) before any warranty return. B&W does not authorize its dealers or distributors to create any other warranty in connection with the product, so the terms above are B&W's own, described here rather than added to.
Free shipping. This item ships free to the lower 48 states. Because it is an oversized item, it ships by freight and typically arrives in 3 to 7 business days.
Inspect on delivery. Please inspect the packaging before signing. If you see any damage, note it on the delivery receipt and contact us right away, and we will make it right.
About B&W Trailer Hitches
B&W Trailer Hitches started in a Humboldt, Kansas garage in 1987, when Roger Baker and Joe Works were building custom truck beds and wanted a gooseneck hitch that did not leave a ball standing up in the bed the other six days of the week. Their answer was the Turnoverball, a ball that flips over and stows flush with the bed floor, and it is still the product the company is best known for. B&W has built hitches in Humboldt ever since and is one of the last hitch makers still manufacturing in the United States.
The company has been 100% employee-owned since 2007, with roughly 500 employee-owners who have a stake in what they build. That shows up in how B&W tests. SAE J-2638 is only a recommended practice for gooseneck and fifth wheel hitches, and where the standard would allow a separate sample for each test, B&W puts a single hitch through all three 300,000-cycle dynamic tests and the six static tests, one after another. The Tow & Stow receiver line is tested to SAE J-684.
Prestige Truck is an authorized B&W Trailer Hitches dealer. Every hitch we ship is new, factory-packed, covered by the full B&W factory warranty, and supported by B&W's own service team in Humboldt, Kansas.
Turning Clearance And When You Need A Slider
B&W walks through how much room a trailer actually needs between its nose and the back of the cab in a tight turn, and how to work out whether your truck and trailer combination needs the sliding version of the hitch.
Worth confirming with a tape measure before you order, because cab-to-nose clearance is what decides whether a slider is the right call.
Companion Features
A run through the design details that separate the Companion from a budget fifth wheel hitch: the wrap-around jaws, the shock absorber, the polyurethane bushings and the two-piece design that lets one person carry it out of the bed in halves.
Worth watching before you compare it against a cheaper hitch, because most of what separates them is in these details rather than in the tow rating.
How The Companion Jaws Work
A close look at the 1" thick jaws closing around a king pin.
This is the part of the hitch that decides whether you get a quiet ride or a chucking one, because the jaws are machined to the pin rather than wedged against it.
Frequently Asked Questions
Straight answers on specs, fit and support
How much can it tow?
B&W rates it at 20,000 lb gross trailer weight with 5,000 lb vertical pin weight. Those are the hitch's numbers. What you can actually tow is the lowest of the hitch rating, your truck's own fifth wheel rating on the door jamb, and, on a rail-mounted hitch, the rails underneath it. Pin weight is the part people forget: a fifth wheel puts roughly 20% of the trailer's weight straight down onto the truck, so check that figure against your truck's payload as well as its tow rating.
What do I need in the truck before this will mount?
You need a B&W Turnoverball under-bed mounting system already installed in the truck. The under-bed system is vehicle-specific and sold separately as a GNRK kit for your year, make and model. Order it with the hitch if the truck does not already have one.
Can I tow with it slid back?
No. The 12" of travel is for maneuvering at low speed, and you should tow with the hitch locked forward. Slid back, the pin weight sits behind the rear axle, which changes the way the truck steers and brakes. Slide it back to turn tight, then lock it forward again before you get back on the road.
How heavy is it, and can I get it in and out on my own?
It ships at about 305 lb, which is more than most people want to lift in one go. The design accounts for that: the coupler lifts off the base by pulling up on the two saddle handles, with no tools, so you move it in two pieces. Most owners take the coupler out and leave the base in, or take both out for a completely clear bed.
What maintenance does it need?
Grease the saddle through the grease zerk about every six months so the coupler keeps pivoting freely, keep the jaws greased with a multi-purpose chassis grease, and either grease the top face of the coupler or run a nylon lube plate on it. Check the pinned and bolted connections before every tow and look for cracks or damage. That is the whole routine.
Why buy this over a rail-mounted hitch?
The bed. A rail-mounted hitch leaves two rails bolted through your bed floor for as long as you own the truck. This one lifts out and leaves the floor flat, which is the difference between a truck that tows and a truck that also hauls. Rail hitches are cheaper, and B&W builds those too as the Patriot line if that trade suits you better.
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