Slotted Raised Countersunk Head Screws

Grade 304 stainless steel slotted raised countersunk head screws have 18% chromium and 8% nickel. That makes them good for places where food is handled, like in kitchens.Grade 316 stainless steel is suitable for use in salty environments, because it has an extra 2% molybdenum to fight off chloride.

Carbon steel types can get really strong. The grade 10.9 ones can reach a tensile strength of up to 1,000 MPa, so they're great for heavy machinery.

Brass screws, like CZ121 or CW614N, don't attract magnets. They can be used in the manufacture of switchboards.

Every batch of these slotted raised countersunk head screws is tested. We check how strong they are when pulled (tensile testing), how well they resist salt spray, and how much torque they can handle.

Maintenance

If you want slotted raised countersunk head screws to last longer, here's what you can do. In places that are really wet, put some anti-seize lubricant on them when you're installing. Every now and then, check the screws to see if the threads are getting worn out or if the coating is coming off.

Don't tighten them too much. If you do, you might ruin the slot or change the shape of the head.

For stainless steel screws, wash them with gentle soaps to stop pitting caused by chloride. And keep them in a dry place where the temperature is steady. That way, they won't start to rust even before you install them.

FAQ

Q: What surface treatments are recommended for slotted raised countersunk head screws in saline environments?

A: In salty places like offshore rigs or coastal infrastructure, Dacromet-coated slotted raised countersunk head screws can handle over 1,000 hours of salt spray. That's tested by ASTM B117. The Xylan®-coated ones cut down on friction and can fight off chemical corrosion too.

Stainless steel A4 slotted raised countersunk head screws don't rust easily by nature, but they're more expensive. Electro-galvanized ones are cheaper and still give some protection if the salt exposure isn't too bad.

For marine hardware, custom treatments like zinc-nickel alloy plating are a good choice. They strike a balance between cost and how well they work.