Save my name, email, and website in this browser for the next time I comment. * Always turn the nut with the torque wrench, rather than the bolt, to avoid further muddying the waters with bolt torsion and shank/bracket friction. Tensile strength is the maximum load in tension (stretching) that a part can carry without breaking. At the end of the day, a chemical analysis is the only 100% certain way to tell. @Joe Hamilton – Your question is a bit out of the realm of our expertise. Not true. Stainless commonly comes in grades 18.8 (304) or T316. But the medium carbon content makes the Class 8.8 Nuts to have high ductility and workability. Much of what we do as builders and maintainers of off-road vehicles is strictly custom, often one-off, stuff. Not only that, but experience teaches us that the damn things invariably squish and splay out under any decent amount of torque anyway. Super Engineers is a worldwide competitor in the era of Fastener Industry.High Tensile Fasteners, Pankaj International is committed to developing, manufacturing, delivering and servicing quality products. The thread class should be matched between nut and bolt. The most common method is to employ a floating, split, conical-shaped washer on the fastener with a matching tapered hole in the part.
I live in western pa and was wondering if one was more resistance to rust then the other… thanks. I am looking to buy some stainless steel deck screws. ), always apply anti-seize compound to one or both pieces. @Faqir – Portland Bolt does not have engineers on staff and cannot make material recommendations for specific applications. Stainless steel is a type of steel that contains at least 10.5% chromium, 1.2% carbon, and other alloying elements. * Severe vibration in a joint can lead to bolt loosening. Significance of Nuts and Bolts for Manufacturing and Industrial Use, Nuts and Bolts for Bicycle Assembly: Tips on Finding the Right Source, Different Coatings Used in Steel Fasteners, Understanding Stainless Steel vs. Steel Materials in Nuts and Bolts, Understanding Zinc Plating and Its Effects on Nuts, Bolts, and Fasteners. The screws can be annealed after forming to rid them of their magnetic properties.
However, many of the off the shelf imported stainless fasteners are not, so it is hit and miss.
The advantage to 316 is that it is more corrosion resistant. Use only top quality fasteners, minimum of SAE Grade 8, from reputable manufacturers. Therefore, unhardened stainless steel fasteners like nuts and bolts are much weaker than hardened common steel fasteners. 300 series stainless is just a tad under a Grade 5 in strength. Un-graded and Grade 2 fasteners have no place whatsoever on a 4x4 as they are weak and unreliable, and while Grade 5 fasteners may exhibit the necessary strength in some applications, in others they do not, and the lower strength and possible misuse of them is simply not offset by the marginal cost benefit. As with any other tech topic, the wise fabricator/builder must apply this or any other technical information with great care, at his/her own risk, and always seek competent professional help when required.