Stainless fasteners?

[aerobat95]

Hey guys I am having my cowl area touched up and was wondering...can I replace the fasteners that hold the cowl sides in place with stainless?  what about the battery compartment?  If so where would I get them? 

[DonMuncy]

Aircraft Spruce

 

[aerobat95]

I took a look there and it looks like they have it for only the J??  Were you looking under the cowling kits? 

[aviatoreb]

Quote: aerobat95

Hey guys I am having my cowl area touched up and was wondering...can I replace the fasteners that hold the cowl sides in place with stainless?  what about the battery compartment?  If so where would I get them? 

[jetdriven]

1)   Spare cowl camloc fasteners. This is for a J, I think your firewall fasteners are same as cowl parting line.  Check M20F parts catalog.

a.     Firewall – - 40S5-5 (-5S is stainless)

                                                           i.     Retaining washer 4002-SW

                                                         ii.     Grommet is 4002-G (flush not plus-flush)

b.     Rear cowling fastener  - 27S3-7 (phillips) 2700-7 (slot) (retainer washer  2600-SW-2)

c.      Cowl parting line, except rearmost - 27S3-4 (phil) (2700-4) slot  (no retainers on shorter than -5)

d.     Battery access hole  “southco 100”

                                                           i.     – screw 82-11-100-20

                                                         ii.     Wear washer is 82-46-101-39

 

[aerobat95]

Sounds like this might be something for my A&P.....I am having the cowl repainted and thought this would be a good time to do this....is it hard to do? 

[rbridges]

my 201 cowling used 2700 series cam lock screws in #4 and #6 lengths.

<$4 a piece at spruce.

[aerobat95]

rbridges....where did you find them?  Is that something that you would have removed prior to paint? 

[jetdriven]

The cowl fasteners wear into the fiberglass cowl on a J, requiring hours of repair with epoxy.   LASAR can bill up to 3K on a J cowl for this.  Im not sure of the F.  The fasteners are easy to change.  Are yours captive or do they remove when you unfasten them?  There is a thin split washer that goes behind them to trap them in the cowl on some.

[aerobat95]

On my cowl the screws turn about a quarter turn and stay in.  On the battery compartment it looks like there is a spit washer on the back.  I will have check the cowl but I am pretty sure its the same set up. 

[rbridges]

it's supposed to have split washers on the back to keep the cam lock from coming out completely when they turn.  most of mine were #4, but the screws closest to the windshield were #6.  The front screws closer to the prop are different (not cam locks).

[OR75]

for your cowling, you may want to look at Milspec 2800 series fastners. (see the link below)

They have the same characteristics as the 2700 series (same dash number for the stud length) but with a larger diameter which avoid the wearing of the fiber glass mentionned above.

The painful part is that as the fiberglass has worn out, the dash number you may need may now be different than the original dash numbers if you want a nice flush finish.  So it may be a trial and error.

They have Money kits too.

http://www.milspecproducts.com/26002700C-Spec.htm

 

 

[aerobat95]

I didnt realize there were so many different options......this is a bit more complex than I was expecting. 

[OR75]

You do not have that many options for the cowling:

It will be:

phillips head

Steel if you want to paint,  Stainless if you don't want to paint them (paint does not adhere well to stainless)  

either 2700 or 2800 series

 

[rbridges]

mine are slotted.  there were a few phillips, but I replaced them to be OCD about it.

[Txbyker]

Don't forget the pliers.  http://www.milspecproducts.com/slides/phototoolsclock.htm

[jetdriven]

I forgot to mention the -4 (or the size it is) is stamped faintly on the fastener, so find out what number your fasteners are, then ordeer replacements in stainless (-S) and phillips or slotted.  The nomenclature is in the part number.

Quote: aerobat95

I didnt realize there were so many different options......this is a bit more complex than I was expecting. 

[Shadrach]

Quote: aerobat95

I didnt realize there were so many different options......this is a bit more complex than I was expecting. 

[aerobat95]

Well, I have the cowl off the plane and into MX right now. They are repairing some cracks on the top portion and removing the original fasters. In addition to this they are going to clean up the access panel area where you check the oil(my OCD problem).  Next week I will be having the wings and cowl painted.  Had the paint matched so it should look really nice once finished.  I'll be having stainless fasteners for the cowl....and I am thinking about the battery access area as well.  I am so excited cause once I am finished with this, the paint will be as close to a 10 as you can get without a complete repaint  On a side note I was shocked how much red costs.....glad I only have a small pin stripe. 

[Hank]

Quote: aerobat95

On a side note I was shocked how much red costs.....glad I only have a small pin stripe. 

[M016576]

Quote: OR75

for your cowling, you may want to look at Milspec 2800 series fastners. (see the link below)

They have the same characteristics as the 2700 series (same dash number for the stud length) but with a larger diameter which avoid the wearing of the fiber glass mentionned above.

The painful part is that as the fiberglass has worn out, the dash number you may need may now be different than the original dash numbers if you want a nice flush finish.

[aerobat95]

I will have to take look at those.....Once the cowl is fixed I might need to get a slightly longer fastener.  How do you know what size to get?  Is it just trial and error?

[rbridges]

I just replaced 2 more on my cowl.  Not counting the first screw near the prop, they were all 2700 series stainless camloks.  All were size 4 except the last one by the windshield which was a 6.

[OR75]

very much trial and error exercise since over time the fiberglass has worn out. Also, don't forget the 4 fastners in the cowling air intake (in a J model).

Maybe worth getting one of each dash (they should all be -4,-5,-6 or -7 range) and see how many of each you will need.

Worth it if you want a flush fasteners.

Also hope that in the future, A&Ps servicing your plane will put them back in the right order. 

[rbridges]

Quote: OR75

Also hope that in the future, A&Ps servicing your plane will put them back in the right order.