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Go Back   SailNet Community > On Board > Gear & Maintenance > Stainless Steel Bolts
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Thread: Stainless Steel Bolts Reply to Thread
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Topic Review (Newest First)
06-06-2012 05:50 PM
casey1999
Re: Stainless Steel Bolts

Reading a April 2010 issue of Practical Sailor, on the last page of mag is article on stainless bolts. THE is from the Taiwan supplier of the bolt- the company is Tong Hwei Enterprises
TONG HWEI ENTERPRISE CO., LTD.-Stainless Steel FastenersĦBStainless Steel BoltsĦBStainless Steel ScrewsĦBStainless Steel Hex BoltsĦBStainless Steel Hex ScrewsĦBDIN 933ĦBDIN 931ĦBDIN 571ĦBDIN 603ĦBStainless Steel Hex Lag ScrewsĦBStainless Steel Carria

The article suggest this site for more information:
Marine Fasteners - Stainless Steel Fasteners Importer and Wholesale Distributor - Solar and Windpower Bolts Nuts Washers 18-8 Stainless Steel Screws Bolts Nuts Washers
05-07-2012 04:14 PM
casey1999
Re: Stainless Steel Bolts

Quote:
Originally Posted by casey1999 View Post
That what I am thinking on the THE, the name brand. But every search I do I cannot find a manufacturer called THE. Next time I am in a store that sells the THE, I will ask them where the bolt came from to try to figure it out. Post if I find anything.
Regards
Ok so I talk to some of the big name bolt suppliers. They tell me the letters "THE" are the manufactur's stamp, but the suppliers cannot tell me the company that makes the bolt, even though they sell the brand. Apparenly the manufacutere is located in either sout Korea or Tawain.

The bolt business seems like kind of a funny thing. You buy a bolt but not really sure who made it. Seems like the supply could be filled with cheap knock off imitations.

A little scary when you are sailing in 30 knots wondering if that single bolt holding your main shroud mast tangs is high quality or some cheap knock off. A previous post gave me the name B&S bolt in VA that sells mil spec bolts- I plan to get those.
http://bsbolts.com/
05-07-2012 01:54 PM
casey1999
Re: Stainless Steel Bolts

Quote:
Originally Posted by sevseasail View Post
I thought 316 was the preferred for the marine use.....
My understanding is 316 is recommended for highly corrosive areas such as the tropics and Floriday. Hot areas that get salt spray and sailing in salt water environments is highly corrosive and 316 recommended. This also is supported by rigging wire suppliers. They can supply 304 or 316 but recommend 316 for tropics. I think 316 is about 10% weaker as compred to 304. Not a significant amount. And if you can prevent corrosion, 10% recuction in strength is well work it.

Marine Wire Rope & Cable, Yacht Rigging, Life Line - Loos & Co., Inc.
05-06-2012 05:50 PM
sevseasail
Re: Stainless Steel Bolts

Quote:
Originally Posted by SloopJonB View Post
You were right. 316 is a bit weaker than 304 but is more corrosion resistant. This is one of those cases where you have to be careful about info gleaned from the web. I have seen actual tables on the web that showed 316 was stronger but it isn't.

As a VERY rough rule of thumb, constituents in alloys that improve corrosion resistance (chrome, nickle) either don't increase it's strength or actually weaken it. Constituents that strengthen it (carbon) reduce its corrosion resistance.
Thank you for that !!
05-06-2012 01:52 PM
SloopJonB
Re: Stainless Steel Bolts

Quote:
Originally Posted by sevseasail View Post
I thought 316 was the preferred for the marine use.....
You were right. 316 is a bit weaker than 304 but is more corrosion resistant. This is one of those cases where you have to be careful about info gleaned from the web. I have seen actual tables on the web that showed 316 was stronger but it isn't.

As a VERY rough rule of thumb, constituents in alloys that improve corrosion resistance (chrome, nickle) either don't increase it's strength or actually weaken it. Constituents that strengthen it (carbon) reduce its corrosion resistance.
05-06-2012 09:05 AM
sevseasail
Re: Stainless Steel Bolts

Quote:
Originally Posted by mdbee View Post
316 is also weaker than 18-8. Technically 316 is more resistant to corrosion (when used in applications like the chemical industry) but 18-8 seems to be preferred for marine use. (or so I have been told by experts)
I thought 316 was the preferred for the marine use.....
05-04-2012 11:46 PM
mdbee
Re: Stainless Steel Bolts

316 is also weaker than 18-8. Technically 316 is more resistant to corrosion (when used in applications like the chemical industry) but 18-8 seems to be preferred for marine use. (or so I have been told by experts)
05-04-2012 08:43 PM
Faster
Re: Stainless Steel Bolts

Here's and article on SS bolts and grades.. looks like 316 is sub-Grade 5, I know in industry SS doesn't do well in high vibration situations....

Article: Stainless steel fasteners
05-04-2012 08:25 PM
casey1999
Re: Stainless Steel Bolts

Quote:
Originally Posted by tommays View Post
I believe THE is a brand of some type as even here on the east cost of the USA MOST of the stuff I buy has this on the head

316 is 316 and it might make it to a grade 3 BUT as its 316 nothing can really be added to change its strength

SS is kind of funny stuff as while it tough as hell to work with it's not that strong

most machines that bend/shear or form it lose about 1/2 capacity
That what I am thinking on the THE, the name brand. But every search I do I cannot find a manufacturer called THE. Next time I am in a store that sells the THE, I will ask them where the bolt came from to try to figure it out. Post if I find anything.
Regards
05-04-2012 08:18 PM
tommays
Re: Stainless Steel Bolts

I believe THE is a brand of some type as even here on the east cost of the USA MOST of the stuff I buy has this on the head

316 is 316 and it might make it to a grade 3 BUT as its 316 nothing can really be added to change its strength

SS is kind of funny stuff as while it tough as hell to work with it's not that strong

most machines that bend/shear or form it lose about 1/2 capacity
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