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Old 03-26-2021, 11:02 AM #76
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So I have a Prinsu full rack, non drill, showing up next week. I think what I am going to do is use the Permatex Ultra Black + the rubber chemical washers from McMaster Carr and I think I will be good to go. I'm going to use the washers around the white plastic pieces on the roof and where the top screw/bolt attaches to the bracket.

If anyone needs the P/N for the McMaster Carr washers, see below. These are the "weather resistant" red washers.

P/N 99604A123

Last edited by danyo492; 03-26-2021 at 11:06 AM.
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Old 05-22-2021, 09:45 PM #77
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Prinsu no drill No silicone option. Use a gasket under a custom spacer, and two o rings on the bolt shank to stop water intrusion down the threads. All McMaster Carr stuff.

1/16 thick x 0.75 EPDM gasket
0.75 wide x 1.00 high Delrin spacer. Cut to 4.25 long
Drilled thru holes 35/64 inch diameter
1/8 buna o rings -203 size
Attached Images
Non Drill roof rack (no silicone)-8e5ca3ad-ef3b-46e0-bdd8-726189416b2d-jpeg  Non Drill roof rack (no silicone)-79fdf9d3-251c-40c5-8349-52c1024222c0-jpeg  Non Drill roof rack (no silicone)-fbeb0797-d4d8-4ad8-89d2-dfb4e1408b15-jpeg 

Last edited by Crob42; 05-22-2021 at 09:49 PM.
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Old 05-23-2021, 11:30 PM #78
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Quote:
Originally Posted by Crob42 View Post
Prinsu no drill No silicone option. Use a gasket under a custom spacer, and two o rings on the bolt shank to stop water intrusion down the threads. All McMaster Carr stuff.

1/16 thick x 0.75 EPDM gasket
0.75 wide x 1.00 high Delrin spacer. Cut to 4.25 long
Drilled thru holes 35/64 inch diameter
1/8 buna o rings -203 size
This is great! What did you search for to find the derlin sheet? Also are the prinsu spacers 1Ē tall? I canít get to mine to measure, but I love this idea.
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Old 05-24-2021, 12:26 AM #79
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The delrin comes in .75 x 1.0 part number 8662K52, you pick the length. Had to sand the sealing side to take out the grooves.

The prinsu spacers are 1.0 x .75 OD X .50 ID.

Standard 1/8 o rings ID of .296 fit great on the .308 bolt shank from prinsu, but are too thick (0.574) for the .5 ID of the prinsu spacer, so one needs a slightly larger bore diameter. Hence the 35/64 drill at .547 dia. This is a good amount of o ring compression but not too much that it canít be assembled. One would be fine but you get a pack of 50 so double up.

Used a 1/16 epdm sheet for the bottom. PN 8990K71
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Old 05-24-2021, 03:58 PM #80
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Quote:
Originally Posted by Crob42 View Post
The delrin comes in .75 x 1.0 part number 8662K52, you pick the length. Had to sand the sealing side to take out the grooves.

The prinsu spacers are 1.0 x .75 OD X .50 ID.

Standard 1/8 o rings ID of .296 fit great on the .308 bolt shank from prinsu, but are too thick (0.574) for the .5 ID of the prinsu spacer, so one needs a slightly larger bore diameter. Hence the 35/64 drill at .547 dia. This is a good amount of o ring compression but not too much that it canít be assembled. One would be fine but you get a pack of 50 so double up.

Used a 1/16 epdm sheet for the bottom. PN 8990K71
If I understand correctly, you put the prinsu spacers inside the delrin block? I'm thinking of taking your idea and applying to my UpTopOverland rack when I get it, looks clean!
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Old 05-24-2021, 04:18 PM #81
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Naw. Threw out the prinsu spacers. Just referenced them to confirm the heigh needed was 1.0 inch. The pics I posted are all that I used. So the delrin spacer has the 35/64 thru hole that the OD of the o ring seals against. The ID of the o ring is on the bolt shank.
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Old 07-20-2021, 10:27 PM #82
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Lock washers no longer needed on Prinsu no drill roof rack
So I just received my Prinsu No Drill Roof Rack. All the lock washers were not in the bag. Iíve emailed the dealer and I am being told that those are no longer needed. Anyone else heard of this?

Thanks
Steve


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Old 07-22-2021, 07:00 PM #83
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Quote:
Originally Posted by ssyota4runner View Post
Lock washers no longer needed on Prinsu no drill roof rack
So I just received my Prinsu No Drill Roof Rack. All the lock washers were not in the bag. Iíve emailed the dealer and I am being told that those are no longer needed. Anyone else heard of this?

Thanks
Steve


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Problem solved


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