4-40 x 2 1/4 316 Stainless Steel Flat Head Socket Cap Screw is commonly specified where a countersunk screw must hold a cover securely while preserving a clean exterior profile. Countersunk installation can make maintenance areas cleaner and reduce catching points around removable covers. 316 stainless steel is often selected where additional corrosion resistance is required compared with general-purpose stainless grades. A hex socket allows the screw to be tightened through the head while preserving the smooth countersunk form. The size can serve industrial distributors supporting maintenance repairs on panels, covers, and enclosures. Purchasing managers can use the FHCS-316 item number to identify the size clearly for RFQs and repeat orders. Call Cold Headers at 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.