Any idea where I can buy 9/16 fine thread stainless bolts for engine mounting ?

[Skater 32]

Looking for a something a little stronger than your run of the mill 1/2 stainless fine thread mounting bolt , any idea where i can find 9/16 fine thread stainless x 5.5 inch for engine mounting ? Already been to mc caster carr

larry

[BarryStrawn]

Try www.totallystainless.com (http://www.totallystainless.com). They have some high stength 9/16 but I don't remember if they have fine thread.

ARP has added 1/2" in both fine and coarse thread to their 2011 catalog. Those should hold anything.

[Skater 32]

cant find SS 9/16 fine thread anywhere

[STV_Keith]

5.5"? What are you trying to go through...that's long as heck. 3" is the longest 9/16-18 I've seen. You can get up to 5" long in 5/8-18 though. http://www.mcmaster.com/#92198a501/=b1viyd

[Skater 32]

through my jack plate, stainless trim plate , extra thick 32 Skater transom then 1/2 plate on inside . I dont want my 3 Litres to move over 3 ftrs @ 100

[Liberator*21]

You might try to find some "ALL THREAD ROD" in 9/16-18 thread. Then have the nuts welded on one end and make them as long as you want............ Another option for you would be to find a metric fine threaded rod of similar diameter...........

[HStream1]

Try fastenal. In looking at their web site for Hex cap screws they only have 9/16 x 5.5 in corse threas. Fine thread is only avaliable in 5" and 8". Nothing inbetween.


9/16"-12 x 5-1/2" 316 Stainless Steel Hex Cap Screw

FNL


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http://www.fastenal.com/web/home.ex

[Skater 32]

Thanks guy's ! I was kicking around all thread and welding nuts on but really not sure how heat would affect stainless strength at the end of the day . Went to Fastenal and no go , only fine thread in 9/16 up to 4 inch . I thought a few years ago I saw 9/16 fine thread bolts for sale on this site .

What Metric size= 9/16 in fine thread ?
Larry

[HStream1]

9/16 is 14.29 mm. So 14mm would be close.

14mm = .5512 ths while 9/16" = .5625

[Skater 32]

Thank you

[HStream1]

Here you go. 140mm is just a little over 5.5".


M14-2.0 x 140mm DIN 931 Class A2 Stainless Steel Cap Screw

FNL


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[Skater 32]

Is that a fine thread ? I found 9/16 x 5.5 in course thread but at the end of day more than likely no more clamping force than fine thread 1/2 when you think about it . Pretty much given up looking , just went to Mc caster car and no fine thread stainless rod , only course thread

[HStream1]

2.0 is course thread in metric. You simply are not going to find fine thread US or metric in that length. The only other option is to have them custom made at a machine shop and at a premium price.

[Skater 32]

How about all thread ?

[HStream1]

You are not going to find fine pitch all thread in a grade sutiable for your application.

Check your PM.

[Skater 32]

I did , nothing there

[HStream1]

look now.

[Gorilla0178]

Broward bolt in pompano, on powerline road.

[Skater 32]

Thanks

[fastcat]

I hade mine made at local machine shop. Are u using cmc jackplates?

[Skater 32]

CMC stainless plates

[fastcat]

Yeah Cmc drills there 5.5 jackplates 9/16 for some reason?

I pulled mine last year because the 1/2 bolts were letting my motors pull together. from turning my props in.
I bought the 9/16 stainless dowel and had them thread and weld a nut and washer on one end and thread the other. I would not use threaded rod.
I had a few extra made. I will see if i cant get you a pic.:thumbsup:

[Skater 32]

what you had made , fine thread or course ?

[MattGreen]

How about going with a stronger grade of stainless like 17-4 preciptation hardening (PH) instead of more typical 18-8 or 300 series, I bet you can find the bolts you want in coarse thread.

Matt

[Skater 32]

Thanks , I will look into it if they dont cost more than the engines

[HStream1]

Unsubscribed :leaving:

[fastcat]

what you had made , fine thread or course ?

Fine thread.

[Thomas H]

Go to www.pointe-products.com, in the search box select Bolts & Cap Screws, click on Bolts & Cap Screws, click on Hex Cap Screws Grade 8 (SAE) Fine thread, scroll almost to the end selecting item 06-15292, and there you will see 9/16"-18 X 5 1/2" Grade 8 Hex Head Cap Screw, $16.43 each. They also have a 6" version for $17.84 if you're not sure about the length. Ironically the fine thread nuts are available at most hardware stores.

Hope this helps.

[Skater 32]

Thanks ! But I need stainless

[STV_Keith]

I'd suspect a Grade 8 coated bolt would work fine, even in salt. I would not hesitate to use it as opposed to SS.

[Thomas H]

Both 9/16" and 5/8" NF are 18 threads per inch. With a little creativity I'll bet a 5/8" could be massaged to a 9/16" and solve your problem. Turn down the OD, re-thread with a 9/16" die and I think you would be good to go.

Just a thought.

[Greg G]

Has anyone found a vendor for the brass nylok nuts to match to either Grade 8 or SS transom bolts? Not easy to find which surprised me.

[truckwrench1]

i would check caterpillar i doubt rhey would be stainless or even able to get stainless but if you need big fine thread bolts cat almost always has them or will get them for you

[XSive]

Call Darris @ Allison Boats. His upper mounting bolts are 9/16" fine thread stainless, so I'm sure he would tell you where to get them.