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Chip ASTM F593 is the most widely available. ASTM A193 is another spec you might look at as its availability is fair. And Mike, I have been selling stainless bolts for 15 years now but I will never be able to look at them the same way after that ear wax remark :-)

Hi Yarsky, There are two popular ASTM specs on stainless steel bolts, where parts are readily available. ASTM A193 and ASTM F593. http://www.ssina.com/download_a_file/fasteners.pdf is a free dowloand that will give you basic info on both, including tensile. I am not familiar with railroad...

I will refrain from entering the disagreement about which is the "better" drive system, but to add to my fellow history buff's information above (good job TBP), the phillips became very popular in the US because it worked well in the relatively new concept of the "assembly line". With manual...

http://www.stainless-steel-world.net/pdf/11003.pdf This might also be helpful besides what is mentioned above.

Are you looking for a particular length? Full or Partial Thread? And are we talking a hex bolt? As Yates said, this is a standard metric size but the A4 makes the availability a lot more challenging. But before I would go so far as to say it isn't stock anywhere I would need to know the above.

In the fastener line - "above water level" we recommend a minimum of 316 stainless steel be used.

Here is something that might help you http://www.hghouston.com/ss_sea.html For the fastener market, our company recommends 304 should not be used in seawater environments.

TpaRAF You might consider the MS 15795 washer series. I am not aware of any ASTM stainless washer specs, but the above stainless steel washer military specification might be useful.

Many of the above free fastener related downloads, with many more, are linked to from http://www.marfas.com/technicalcont.shtml. Emphasis of site seems to be on stainless steel but might be of assistance to someone.

I have always pronounced the mon like momma me-a. el was always pronounced as in the adjective usually expressed when seeing its final cost. Having read this forum thouroughly, and with metalguy's pronunciation now burnt permanently in my mind, I will never again be able to look upon this...

These bolts were manufactured by Tong Hwei Enterprises of either Malaysia, China, or most likely, Taiwan. As to the S30400 specification, these bolts are marked to show they were made from 304 stainless steel. These bolts can be represented and sold as 304 stainless steel or 18-8 stainless...

Besides the spec's that CoryPad has supplied you, ASTM F593 is a popular stainless bolt spec. Erasmu, if you can advise all of the headmarkings on the bolts you are having problems with I might be able to help you with some background on the fastener - ie mfg, specification the mfg meant it to...

All four 304 parts measured below the .03% sulphur specification requirement, with the 303 washer falling below the .15% sulphur. The bolt, which went the full 500 hours, had the highest level of sulphur, though it fell within the requirements. All threaded parts were roll thread and cold...

Thanks for responding Corypad. Yes the bolts, machine and sheet metal screws were made by one manufacturer (different plants), and the nuts and washers were from two others. The manufacturer of the first three and the nuts were passivated to ASTM A-967 and the washers were passivated to the old...

We recently conducted some salt spray tests and are coming back with some data we find confusing. 5 stainless steel fasteners were sent to be tested by a well respected labratory in PA and 2 seperate tests were conducted on 5 samples of each of the 5 parts. We already had the material certs on...

Quaker T You might want to check out www.marfas.com and check out the Technical section and the continuation of the technical page. I post as much free literature that I can find to assist engineers with fasteners and stainless steel. Before you pay for specific information, you might check out...

NIST is responsible for registering all bolt head markings since the Fastener Law took effect. For a free pdf copy of their most current list, you may go to http://www.uspto.gov/web/offices/tac/fqa/fqa.htm.

Hey Damineh - Lot of good suggestions you are receiving although I have to agree with TVP - the only sure way of knowing what you are getting is find a certified lab. The training you received was wrong, although common. Your 300 series stainless are "generally" non magnetic unless...

http://www.marfas.com/Ttorque.shtml Be careful using torque tables on 304 or 316 stainless fasteners - lot of variables exist that can make a difference. Number of sites carry these same numbers, but none document their source.

Vince Not sure if this is helpful or not but thought I would share it. Fastener Standards Sixth Edition B-161 under Electrodeposited Coatings of Iron and Steel" "6.5 - All steel parts having an ultimate strength of 1,200 MPa (174 ksi) or higher, shall be baked at a minimum of 190...