Will High Tensile bolts rust

Submitted: Sunday, Aug 08, 2010 at 18:33
ThreadID: 80602 Views:9060 Replies:5 FollowUps:16
This Thread has been Archived
Hi - I just used some High Tensile bolts to bolt a box to the floor of the car.

I removed the back seats and used the thread they were bolted in to.

The bolts I used where Champion FBM 107 Flange Bolts.

Even though these bolts are from inside the car end tip of the boilts go through the floor under the car and are therefore exposed.

I was just wandering if these bolts will rust. I have not used them before and there is nothing on the packet.

(Sorry a bit of a dumb question but I don't know the answer)

Thanks in advance,
Richard
Back Expand Un-Read 0 Moderator

Reply By: Rockape - Sunday, Aug 08, 2010 at 18:39

Sunday, Aug 08, 2010 at 18:39
Richard,
they will over time if they are black carbon steel. Just put some anti-sieze on the treads and coat the ends with paint or rust preventer, in fact I mix Soft Seal rust preventer and the paint together.

Have a good one



AnswerID: 426644

Follow Up By: Skippype - Sunday, Aug 08, 2010 at 18:50

Sunday, Aug 08, 2010 at 18:50
Richard
Rockape's advice is spot on. Just follow his instructions and all will be well.
Skip
0
FollowupID: 697193

Follow Up By: Member - Richard C (ACT) - Sunday, Aug 08, 2010 at 18:51

Sunday, Aug 08, 2010 at 18:51
Rockape,
They are those brassy looking ones.

At the moment it is a temporary arrangement as it is a bit of a test case but I am thinking of doing something a bit more semi permanent so want to know if this is a good option.


Thanks for your reply, I will definitely spray some anti rust stuff on the them as they will be in for a few weeks if not longer.

Richard
0
FollowupID: 697194

Follow Up By: Lex M (Brisbane) - Sunday, Aug 08, 2010 at 18:54

Sunday, Aug 08, 2010 at 18:54
Regardless of whether they are black, galv or zinc the exposed ends will get sandblasted under the car and rust.

My suggestion is Permatex No3 non-hardening aviation gasket sealer. I use it on every threadthing.
0
FollowupID: 697195

Reply By: carlsp - Sunday, Aug 08, 2010 at 19:50

Sunday, Aug 08, 2010 at 19:50
Richard,

You can get stainless steel bolts as they are high tensile as well. Unless you are using a stack of them, I cannot see the cost being too much. Just take the old ones and get the counter sales guy to match them.

I see that you are ACT, so perhaps there is not much use for SS there. That is a more of a place where, everyone wants to wrapped in Teflon. (nothing sticks). Sorry could not help that.
AnswerID: 426656

Follow Up By: Member - Richard C (ACT) - Sunday, Aug 08, 2010 at 19:58

Sunday, Aug 08, 2010 at 19:58
Carlsp,'
At least the mushrooms grow well :)

Richard
0
FollowupID: 697217

Follow Up By: Rockape - Sunday, Aug 08, 2010 at 20:40

Sunday, Aug 08, 2010 at 20:40
I have never seen high tensile stainless bolts, are they grade 8 stamped.
0
FollowupID: 697231

Follow Up By: fisho64 - Sunday, Aug 08, 2010 at 21:08

Sunday, Aug 08, 2010 at 21:08
I work in the marine industry and havent come across PROPER HT SS bolts.
Problem with SS bolts is that it stretches under tension, more than carbon steel and when it stretches thread pitch changes leading to galling/binding.

Id suggest in your circumstance that HT is pointless as they are only as good as the thread they are going into, Im surmising they wont be anything special.
0
FollowupID: 697241

Follow Up By: Rockape - Sunday, Aug 08, 2010 at 21:25

Sunday, Aug 08, 2010 at 21:25
Fisho,
The nuts he is bolting into are HT as they are for the seats
0
FollowupID: 697244

Follow Up By: Member - Richard C (ACT) - Sunday, Aug 08, 2010 at 21:57

Sunday, Aug 08, 2010 at 21:57
May be if I explained what I was doing.

I took the back seat out to fit more things in - I have a SWB Pajero so nee dthe room.

One of the things I have is a box - a plastic one from Super Cheap at the moment which I strap down vai a ratchet strap.

As the number of tie down points are limited in the SWB or in useless places I have in the past attached a couple of angle brackets to the floor using the same holes as I am now. As the brackets were small I could use the same bolts as used fior the seat. They look like stainless steel. These bolts are M10 with a pitch of 1.25.

The only bolts I could find with the above specs were the high tensile ones I have mentioned.

So instead of strapping it down I decided to just bolt the box to the floor. If it goes well I will replace it with a metal and stronger box.

For now it seems Ok but want to confirm the bolts I am using are good for the job and rust is one of the issues I was concerned about. I will not leave the box in permanently as do want to put the back seats in sometimes but it could be there for months at a time.


RIchard
0
FollowupID: 697254

Follow Up By: fisho64 - Sunday, Aug 08, 2010 at 22:24

Sunday, Aug 08, 2010 at 22:24
yeah I know they are for the seats, but as theyb are usually just spot welded onto the underside of the chassis sheet metal from memory, plus they dont actually hold the passengers weight Id be suprised if they were grade 8.8.

maybe your right, not important any way.

Richard-yes HT bolts will rust but as said before do as rockape said and coat them and theyll be there long after the car is gone!
0
FollowupID: 697265

Follow Up By: Joe Grace Doomadgee - Sunday, Aug 08, 2010 at 22:36

Sunday, Aug 08, 2010 at 22:36
Stainless sell will sove one problem but will create another one so dont go there.... (worked on pearl boats as a mech before you ask !!!)
Unless you plan to keep the car for a zillion years just give em a spray with all the "stuff" listed above and forget it, after all if you can still remove a bolt on a car that is 17 years old and it is original without any "sprays" from the factory you will have another 17 years left before ya have to worry ......
If they are "gold" looking they will be good, anodised will stop rust, the "grade" wont make squat differance to rusting and for normal use a standard grade bolt will be fine....
0
FollowupID: 697270

Follow Up By: Member - Richard C (ACT) - Sunday, Aug 08, 2010 at 23:21

Sunday, Aug 08, 2010 at 23:21
To all.
Many thanks for the great and VERY quick responses.

I hunted around the net for some time to get an answer to this before posting here.

I did not get the answer from the net but have certainly got one from here.

So once again thanks you you all,
Richard
0
FollowupID: 697278

Follow Up By: Honky - Monday, Aug 09, 2010 at 09:18

Monday, Aug 09, 2010 at 09:18
In the back of my mind I seemed to remember that some High tensile bolts are not good when there is possible metal fatigue as constant vibration can bleep ter the bolt. Ie they do bent or stretch, they just break.

Honky
0
FollowupID: 697299

Follow Up By: Honky - Monday, Aug 09, 2010 at 15:32

Monday, Aug 09, 2010 at 15:32
The Bleep took out part of the word which was not swearing.
The word was what happens when you drop say a glass or light bulb.
At least it left the "ter" in
Honky
0
FollowupID: 697343

Follow Up By: guy007 - Monday, Aug 09, 2010 at 17:27

Monday, Aug 09, 2010 at 17:27
Hello,
It seems to me that hi tensile bolts in this instance are probably overkill. If you are worried by possible rusting do as rockape says and they will be fine. The brassy look is some kind of electroplating which would offer some protection. To hunt up stainless hi tensile bolts to hold a box down would be serious overkill. A quick spray with Lanotec would do the job.
Guy
0
FollowupID: 697369

Reply By: Member - Bucky - Tuesday, Aug 10, 2010 at 04:30

Tuesday, Aug 10, 2010 at 04:30
YES
unless stainless


Cheers
Bucky
AnswerID: 426811

Reply By: Outnabout.. - Tuesday, Aug 10, 2010 at 22:32

Tuesday, Aug 10, 2010 at 22:32
I wouldn't loose much sleep over this unless you plan to be constantly submerged in salt water. There are a heap ofbolts sticking through the floors of 4wd with no protection. Most seat belt bolts and seat bolts protrude through the floor . The gold bolts are cad or zinc plated and will be fine . If you are worried just smear them with grease, lanolin , wd40 etc.

David
AnswerID: 426900

Follow Up By: Member - Richard C (ACT) - Tuesday, Aug 10, 2010 at 23:19

Tuesday, Aug 10, 2010 at 23:19
David,
I coated them withe some Laolin for now.

RIchard
0
FollowupID: 697500

Reply By: Mike DiD - Wednesday, Aug 11, 2010 at 12:12

Wednesday, Aug 11, 2010 at 12:12
Are you aware of the rugulations about removing seats ?
AnswerID: 426933

Follow Up By: Member - Richard C (ACT) - Wednesday, Aug 11, 2010 at 17:04

Wednesday, Aug 11, 2010 at 17:04
No - not sure if I want to be :).


These are the back seats.

I think many people have done this.

The seats in the Paj fold up any way so am not doing much more.

Richard
0
FollowupID: 697546

Sponsored Links

Popular Products (14)