Fractional Size 316 SS Fastener
Stainless Steel Hex Head Cap Screws – ASTM F593 (316 Stainless Steel)
ASTM F593 hex head cap screws manufactured from 316 stainless steel are engineered for superior corrosion resistance, strength, and long-term reliability in the harshest environments. Commonly specified for marine, chemical, and industrial applications, these fractional-size fasteners deliver dependable performance where standard materials may fail.
ASTM F593 Mechanical Properties and Conditions
ASTM F593 covers stainless steel bolts, screws, and studs used in general and severe-service applications. For sizes 1/4" through 5/8", 316 stainless steel fasteners are produced in Condition CW1, offering a tensile strength range of 100,000 to 150,000 psi, a yield strength of 65,000 psi, and a Rockwell hardness of B95 to C32. These fasteners are identified by the F593G head marking.
For sizes 3/4" through 1-1/2", fasteners are manufactured in Condition CW2, providing a tensile strength range of 85,000 to 140,000 psi, a yield strength of 45,000 psi, and a Rockwell hardness of B80 to C32. Larger-diameter fasteners carry the F593H marking, allowing easy identification and compliance verification in the field.
Superior Corrosion Resistance of 316 Stainless Steel
316 stainless steel is composed of approximately 16% chromium, 10% nickel, and 2% molybdenum, which significantly enhances resistance to rust, pitting, and crevice corrosion. The added molybdenum makes these fasteners especially effective in chloride-rich, saline, and acidic environments, including coastal and marine applications.
Design, Sizing, and Application Versatility
The hex head design enables secure wrenching and accurate torque application using standard tools. Fractional sizing ensures compatibility with U.S. standard nuts and washers, simplifying installation and replacement. These fasteners maintain strength and integrity at elevated temperatures and under continuous exposure to harsh conditions.
Common Applications for ASTM F593 316 Hex Head Cap Screws
Marine and coastal construction
Chemical processing and storage equipment
Food and pharmaceutical manufacturing
Oil, gas, and industrial machinery
For critical applications requiring unmatched corrosion resistance and durability, ASTM F593 316 stainless steel hex head cap screws provide long-lasting performance professionals trust.