stainless steel bolts

[bartz paul]

I'm told there's doubt that ss bolts come in grade 8 quality. The machinist
I talked to said he never heard of such. He said ss bolts have about half
the strength of a grade 8 bolt.
The only way to know for sure if they are equivalent is to find out what the
tensile strength of a grade 8 bolt is and then see what it is for the ss
bolt.
Paul Bartz
From: MTrovao
Sent: 2/17/99 4:20 PM
Subject: Re: GMC: stainless steel bolts

Arch, from what I understand, ss bolts come in different material like 304,
316, 321, and 347. This only applies to hex head bolts.
Manny 73 Custom/ex-Glacier

 

[bartz paul]

Don't believe I've ever found any ss ones at those places??

Paul Bartz

- -----Original Message-----
From: ELUBO [mailto:ELUBO]
Sent: Thursday, February 18, 1999 12:00 PM
To: gmcmotorhome
Subject: Re: GMC: FW: stainless steel bolts

go to a farm supply or tractor dealer and you could buy all the grade 8
bolts
you want.

Ed Lubo

 

[balcom robin s]

Russ - I'm pretty sure that S.S. here stands for shear strength, and T.S.
stands for tensile strength.
Robin

> ----------
> From: Russ Bethel[SMTP:grbethel]
> Reply To: gmcmotorhome
> Sent: Thursday, February 18, 1999 1:23 PM
> To: gmcmotorhome
> Subject: Re: GMC: FW: stainless steel bolts
>
> In my Standard Aircraft Handbook they say that the following bolts are
> available from aircraft supply vendors.
>
> NAS464 series hex head bolt 95,000 psi min S.S.
> NAS1103 thru NAS1120 series hex head bolt 95,000 psi min S.S.
>
> NAS1003 thru NAS1020 series hex head bolt 140,000 psi min T.S.
> NAS1303 thru NAS1310 series hex head bolt 160,000 psi min T.S
>
> oversize bolts
>
> NAS2903 thru NAS2920 series hex head bolt 160,000 psi min T.S.
>
> I think the higher the psi the stronger the bolt. I also think the S.S
> means stainless steel and the T.S. means tungsten steel. If an oversize
> 5/16 bolt was needed I think the NAS2905 series bolt would be either
> 21/64"
> in diameter or 11/32" diameter.(check with the supplier to be sure of the
> diameter as I have forgotten if the oversize bolts are1/32" or 1/64"
> oversize) These oversize bolts may work better in the ball joints than
> green loctite. In aircraft they install fasteners with sealer on them to
> help control corrosion and leaks.
>
> Some of the engineers on the net may be able to explain the relationship
> between the psi in the bolt spec. and the strength of the bolts. As an
> aircraft mechanic I just install the one the engineer calls out to use.
>
> Russ Bethel
> grbethel
>

 

[russ bethel]

In my Standard Aircraft Handbook they say that the following bolts are
available from aircraft supply vendors.

NAS464 series hex head bolt 95,000 psi min S.S.
NAS1103 thru NAS1120 series hex head bolt 95,000 psi min S.S.

NAS1003 thru NAS1020 series hex head bolt 140,000 psi min T.S.
NAS1303 thru NAS1310 series hex head bolt 160,000 psi min T.S

oversize bolts

NAS2903 thru NAS2920 series hex head bolt 160,000 psi min T.S.

I think the higher the psi the stronger the bolt. I also think the S.S
means stainless steel and the T.S. means tungsten steel. If an oversize
5/16 bolt was needed I think the NAS2905 series bolt would be either 21/64"
in diameter or 11/32" diameter.(check with the supplier to be sure of the
diameter as I have forgotten if the oversize bolts are1/32" or 1/64"
oversize) These oversize bolts may work better in the ball joints than
green loctite. In aircraft they install fasteners with sealer on them to
help control corrosion and leaks.

Some of the engineers on the net may be able to explain the relationship
between the psi in the bolt spec. and the strength of the bolts. As an
aircraft mechanic I just install the one the engineer calls out to use.

Russ Bethel
grbethel

 

[bartz paul]

Russ:

Normally, you'll find that the psi rating refers to the allowable stress
rating, which deals with a rating assigned to a fastener that is within its
elastic limit. It means the maximum stress that is considered safe for the
item to carry in use.

Curious to know what kind of sealer you are talking about? Can you tell us
the brand and product name? How does the product compare to anti-seize
compound??

Paul Bartz

From: Russ Bethel [mailto:grbethel]
Sent: Thursday, February 18, 1999 1:24 PM
Subject: Re: GMC: FW: stainless steel bolts

In my Standard Aircraft Handbook they say that the following bolts are
available from aircraft supply vendors.
NAS464 series hex head bolt 95,000 psi min S.S.
NAS1103 thru NAS1120 series hex head bolt 95,000 psi min S.S.
NAS1003 thru NAS1020 series hex head bolt 140,000 psi min T.S.
NAS1303 thru NAS1310 series hex head bolt 160,000 psi min T.S oversize bolts
NAS2903 thru NAS2920 series hex head bolt 160,000 psi min T.S.
I think the higher the psi the stronger the bolt. I also think the S.S
means stainless steel and the T.S. means tungsten steel. If an oversize
5/16 bolt was needed I think the NAS2905 series bolt would be either 21/64"
in diameter or 11/32" diameter.(check with the supplier to be sure of the
diameter as I have forgotten if the oversize bolts are1/32" or 1/64"
oversize) These oversize bolts may work better in the ball joints than
green loctite. In aircraft they install fasteners with sealer on them to
help control corrosion and leaks.
Some of the engineers on the net may be able to explain the relationship
between the psi in the bolt spec. and the strength of the bolts. As an
aircraft mechanic I just install the one the engineer calls out to use.
Russ Bethel
grbethel

 

[russ bethel]

We use a sealer to seal seams on aircraft. It sets up like rubber. It is
either brown, dark brown or gray in color. The color is determined by the
part number. I think what is listed below is brown or dark brown.

There are several part numbers for it depending on its use. I have a couple
of different tubes here at home (expired shelf life so it can not be used on
aircraft but it works on GMCs if it is not too old). The part numbers on
the tubes I have here is:

P/S 870 B-2
BMS-5-95K TYPE 1 CLASS B-2

P/S 870 A-1/2
MIL-S-81733C, AMEND. 1 TYPE 1-1/2

There are other types such as PRC 1422A 1/2, which we use to seal fuel
tanks. If additional information is wanted I would suggest contacting the
people below.

The name of the company that is packaging this sealer is:

Courtaulds Aerospace
6022 Corporate Way
Indianapolis, IN 46278

I do not have a phone number for them but it should not be hard to find on
the internet.

I have sealed my GMC with this type of sealer. I do not have any seam
leaks. The only leak that I have is at the stove vent flapper. The flapper
is missing. I am going to Orlando in March so I plan to get one there.

This sealer works well but it can be messy to use if you have not used it
before. The best way to use it is to mask each side of the seam you are
trying to seal, apply the sealer to the seam with a tongue depressor and
smooth sealer using the tongue depressor's rounded end. That removes the
excess and tends to force the sealer into the seam. Remove the masking tape
before the sealer sets up hard. You can trim the excess with a razor blade
if necessary. This stuff works very well but I think it is expensive. I
guess that next to RVs aircraft parts are even more expensive.

If someone wants to see what it looks like come see me at Myrtle Beach. I
always carry a couple of expired tubes with me in case an emergency leak
repair is needed.

Russ Bethel
grbethel

>
>Curious to know what kind of sealer you are talking about? Can you tell us
>the brand and product name? How does the product compare to anti-seize
>compound??
>
> Paul Bartz