The bolts which secured the rail covers can be used to secure the bench to the rails.   I’d have to go look to be certain, but I think they are M10  or M13 … 

> On 27-Jul-2018, at 03:15, KI4TLF <ki4tlf@GMAIL.COM> wrote:
> 
> Mine had a set of bolts that just went through the rail and into the floor of the van.
> Once the seat was slid into the van, another set of bolts went through the seat rail into the van rail.
> I can't remember if they just went into the rail or through the rail into the van floor.
> 
> GregM
> 
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Jim. Felder
> Sent: Thursday, July 26, 2018 9:52 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Securing a bench seat
> 
> Do you have the hardware? It is several (about 8?) sets of bolts and clamps
> for the sliding rail. Some of the clamps, which are shaped for the
> application, also have an extension that is located and tapped for the
> screws that secure the cover plates I mentioned. At least the sets I have
> seen have this, others made for other models could be different.
> 
> Jim
> 
> On Thu, Jul 26, 2018 at 9:42 AM Jeff Palmer <w.jeff.palmer@icloud.com>
> wrote:
> 
>> Hi Jim.  My van already has the tracks, and it sounds like Eric's does
>> too.
>> 
>> I was able to slide in the seat without a problem but wasn't sure how to
>> secure it.  There seems to be bolts and clamps recessed in the track, and i
>> wasn't sure if they were supposed to clamp the track down?
>> 
>> Thanks
>> Jeff
>> 
>> On Jul 25, 2018, at 02:55 PM, "Jim. Felder" <jim.felder@GMAIL.COM> wrote:
>> 
>> I have a writeup with pictures on how to add a sliding seat to a camper.
>> You need to cut the flooring where the pre-drilled and tap bolt holes are
>> located, and make slots the correct width and length. You are first putting
>> down a sheet metal tray, and on top of that the tracks that receive the
>> sliding seat. Then, there is a set of hold-down hardware that secures the
>> seat and keeps it from sliding. On top of that are metal covers and very
>> wide headed screws that bolt the covers down to the special brackets for a
>> smooth flow when the seat it out. I have a set of this stuff that includes
>> everything but the sheet metal trays and the sheet metal covers. it
>> includes the tracks and sliders, which can by the way be installed on top
>> of the floor, so no cutting and no metal trays to fool with, but when the
>> seat is out you have these two metal brackets all the way across the floor.
>> 
>> Jim
>> 
>> On Wed, Jul 25, 2018 at 3:44 PM Eric Caron <eric.caron@icloud.com> wrote:
>> 
>> Hi Jeff,
>> 
>> 
>> I’ll be looking forward to the answer.
>> 
>> 
>> I have two bench seats one brown and one grey. The older brown one
>> 
>> matches my van the newer grey one seems a bit lighter and has backs that
>> 
>> flip down.
>> 
>> 
>> Neither one seemed to fit perfectly as the slider didn’t want to close.
>> 
>> 
>> I suspect both mine were for passenger vans. I was recommended to
>> 
>> remove the arm rest on one side and that did make the seat fit beter. I
>> 
>> recently removed both arm rests from the Grey one and that gave me some
>> 
>> wiggle room. I then used the same bolts that hold down the metal track
>> 
>> covers to secure the seat from sliding left to right. I only put in about
>> 
>> two bolts.
>> 
>> 
>> I suspect there is actual additional hardware for the seat to be secured
>> 
>> but I’ve never had my hands on it.
>> 
>> 
>> I’m looking forward to responses.
>> 
>> 
>> Best,
>> 
>> 
>> Eric Caron
>> 
>> 
>> 85 GL Auto
>> 
>> 
>> 
>> On Jul 25, 2018, at 12:18, Jeff Palmer <w.jeff.palmer@ICLOUD.COM> wrote:
>> 
>> 
>> I have a double bench seat that I’ve installed on the tracks in my 85
>> 
>> Westfalia. How should I secure the bench seat from sliding (not that it
>> 
>> ever would). There are brackets held in place with bolts. Do the brackets
>> 
>> secure the frame somehow?
>> 
>> 
>> Thanks
>> 
>> Jeff
>> 
>> 
>> Sent from my iPhone
>> 
>> 
>>