Stainless Steel Hex Cap Screws
What are stainless steel hex cap screws? Stainless steel hex cap screws are precision hex-head bolts with a washer-faced head and tighter tolerances than standard hex bolts, used with a nut or in a tapped hole. Made from stainless, they resist rust in wet, coastal, and outdoor machinery and structural connections.
What makes a hex cap screw different from a hex bolt
Hex cap screws are held to closer dimensional tolerances than general hex bolts and have a washer-faced bearing surface under the head for a cleaner, more consistent clamp. That precision suits machinery and repeatable assembly. In stainless, they add corrosion resistance for equipment that sees moisture, wash-down, or the outdoors. As with all stainless fasteners, use anti-seize to prevent galling and step up to 316 for coastal and saltwater exposure.
Why choose stainless steel hex cap screws
- Precision tolerances: consistent fit for machinery and repeat assembly.
- Washer-faced head: clean, even bearing surface under the head.
- Corrosion resistance: holds up in wet and outdoor use.
- Grade options: 18-8, 304, and 316 for the right environment.
Common applications for stainless hex cap screws
- Machinery and equipment assembly
- Tapped-hole and nutted connections
- Food-grade and wash-down equipment
- Marine and coastal hardware (use 316)
Match them with stainless hex nuts and flat washers, and see every grade and finish on the main hex cap screws category.
Stainless Steel Hex Cap Screws FAQ
Is a hex cap screw the same as a hex bolt?
They are similar, but hex cap screws are made to tighter tolerances with a washer-faced head. Hex bolts are a looser general-purpose standard.
What is the difference between 18-8 and 316 hex cap screws?
18-8 offers strong general corrosion resistance. 316 adds molybdenum for much better resistance to salt and chlorides in coastal and marine use.
Why do stainless cap screws gall when tightening?
Stainless threads can cold-weld under friction. Apply anti-seize, drive slowly, and avoid impact drivers to prevent galling.