18-8 Stainless Steel Fasteners: Bolts and Screws

There is no single tensile-strength value for every stainless steel bolt. Strength varies with the stainless steel grade, bolt size, thread form, manufacturing condition, and applicable mechanical specification. The products provided here do not publish a tensile-strength rating. For a load-bearing application, request the relevant technical documentation and verify the requirement against the selected bolt specification.

The 8.8 designation is a property class used for certain metric steel bolts and describes specified mechanical performance under the applicable standard. It is not a designation for 18-8 stainless steel. When selecting between an 8.8 bolt and a stainless fastener, compare the required strength, corrosion environment, thread system, dimensions, and material specification rather than relying on the grade marking alone.

Stainless steel is commonly grouped into austenitic, ferritic, and martensitic families, although additional categories and duplex grades are also used. These families differ in structure, corrosion behaviour, strength, and heat-treatment response. 18-8 fasteners are generally discussed within the austenitic stainless steel group, but the exact product grade and mechanical properties should be confirmed from the manufacturer or supplier.

The supplied category data includes a 10-32 self-tapping screw, precision shoulder screws, and fastener listings associated with 18-8 stainless steel. The information does not provide complete dimensions, grades, finishes, or mechanical ratings for every listing. Request the applicable product details before ordering so the thread designation, geometry, and intended application can be checked.

The listed self-tapping screw has a 10-32 thread designation. Product information also identifies ASME B18.6.4 as a dimensional standard for tapping screws and references ASME B1.1 and ASME B1.2 for Unified inch threads and gauging practice. No product-specific conformity claim is published, so verify the required thread and dimensional documentation before use.

Start by confirming the fastener type, thread designation, dimensions, installation method, operating environment, and required mechanical performance. For stainless products, also consider corrosion exposure, mating materials, and installation conditions. The supplied listings do not publish complete specifications for every item, so provide the part requirements or drawing to Quality FORM Tools for product and pricing discussion.