316 Stainless Steel Hex Flange Nuts

Serrated Hex Flange Nuts, 316 Stainless Steel

Marine Grade | 316ss | ASME B18.2.2 Standard

Secure your build with confidence using our 316 Stainless Serrated Hex Flange Nuts—the premium fastening choice for high-strength, corrosion-resistant applications in marine and coastal environments. Precision made from 316ss, these flange nuts are trusted by boatbuilders, shipyards, and restoration professionals who demand uncompromising durability and performance.

Key Features:

• Material: 316 Stainless Steel, not 304 or 18-8
• Integrated Flange: Distributes load evenly and eliminates the need for a washer
• Serrated Bearing Surface: Locks in place and resists vibration-backed loosening
• Thread Type: Unified National (Imperial)
• Corrosion Resistance: Outstanding in saltwater and high-moisture environments

Why Choose These Nuts?

Unlike standard flange nuts, the serrated face bites into mating surfaces, providing a mechanical lock that resists loosening due to vibration or torque cycling. Paired with a stainless steel bolt or machine screw, these nuts form an unbeatable union that won't gall, seize, or degrade like stainless steel can in wet or dissimilar-metal conditions.

Common Uses:

• Boat construction and refits
• Deck hardware installations
• Coastal architectural projects
• Outdoor furniture, assemblies, or machinery
• Anywhere vibration resistance and long-term corrosion performance are critical

Stainless Flange Nut Dimensions:

Size	Flange Diameter (FD)	Total Height (TH)
1/4"-20	0.58"	0.23"
5/16"-18	0.67"	0.275"
3/8"-16	0.75"	0.34"
1/2"-13	1.00"	0.45"