316 Stainless Steel Flat Head Socket Cap Screws

Since 1962, Cold Headers has supplied precision 316 Stainless Steel Flat Head Socket Cap Screws to OEM manufacturers, industrial distributors, maintenance professionals, and engineering teams throughout North America.

316 Stainless Steel Flat Head Socket Cap Screws are commonly specified where a flush-mounted fastener is required without sacrificing corrosion resistance or fastening strength. Designed for countersunk holes, the flat head sits level with the material surface to provide a clean finished appearance while reducing protruding hardware that could interfere with moving components, equipment access, or exposed surfaces.

The addition of molybdenum gives 316 stainless steel outstanding resistance to chlorides, saltwater, chemicals, and washdown environments, making these fasteners well suited for marine equipment, food processing machinery, pharmaceutical equipment, chemical processing systems, outdoor installations, instrumentation, equipment panels, machine covers, and precision OEM assemblies.

Available Sizes

Cold Headers stocks a wide range of 316 Stainless Steel Flat Head Socket Cap Screws in numerous diameters and lengths for OEM, industrial, and maintenance applications.

Looking for a Size That Isn't Shown?

Our online catalog highlights many of our most commonly stocked products but does not represent every available size or special configuration.

We can frequently quote and supply:

  • Special Lengths
  • Non-Catalog Sizes
  • Difficult-to-Source Fasteners
  • OEM Production Quantities
  • Large Production Runs
  • Special Sourcing Requests

If you don't see the exact 316 Stainless Steel Flat Head Socket Cap Screw you need, there's a good chance we can still supply it.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.

Unit of Measure
Items
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4-40 x 1/4 316 Stainless Steel Flat Head Socket Cap Screw
List Price (per 100 pieces) $34.00

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4-40 x 5/16 316 Stainless Steel Flat Head Socket Cap Screw
List Price (per 100 pieces) $35.00

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4-40 x 3/8 316 Stainless Steel Flat Head Socket Cap Screw
List Price (per 100 pieces) $36.00

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4-40 x 1/2 316 Stainless Steel Flat Head Socket Cap Screw
List Price (per 100 pieces) $38.00

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4-40 x 5/8 316 Stainless Steel Flat Head Socket Cap Screw
List Price (per 100 pieces) $39.00
Description N/A 4-40 x 1/4 316 Stainless Steel Flat Head Socket Cap Screw is designed for countersunk installations where raised hardware would interfere with movement, cleaning, or a smooth finished surface. Countersunk seating allows covers and plates to close cleanly without raised hardware disrupting the surface. Its stainless construction is useful for chemical processing, pharmaceutical equipment, and outdoor applications where moisture is present. Internal hex drive access is useful in compact equipment where a clean outside face still needs secure tightening. It fits cover plates, enclosure doors, control panels, and removable guards where a flush surface is preferred. Repair technicians can use the defined size when replacing countersunk hardware on panels or covers. Call Cold Headers at 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote. N/A 4-40 x 5/16 316 Stainless Steel Flat Head Socket Cap Screw is commonly specified where equipment panels or covers need a flush-mounted fastener that does not project above the assembly. The design helps solve the common problem of securing a cover without leaving hardware proud of the surface. The stainless material helps maintain fastener performance in humid, coastal, and outdoor equipment installations. The internal drive supports controlled torque application in panels, housings, and cover plates. The fastener is appropriate for OEM machinery, architectural hardware, coastal installations, and outdoor equipment. Industrial buyers can use the size-specific listing to reduce ambiguity during quote requests and replenishment. The combination is practical where clean exterior surfaces and corrosion resistance are both required. Call Cold Headers at 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote. N/A 4-40 x 3/8 316 Stainless Steel Flat Head Socket Cap Screw provides a recessed fastening solution for designs that require a clean surface and corrosion-resistant stainless hardware. This head style helps keep equipment surfaces cleaner in washdown or food-contact-adjacent areas. The material helps protect exposed fasteners in coastal air, process cleaning, and chemical-adjacent service conditions. A recessed hex socket supports assembly and service access where tool clearance around the head is limited. It can support food processing equipment, beverage processing lines, pharmaceutical equipment, and washdown machinery. OEM manufacturers can document the exact size while keeping stainless flat head hardware consistent across builds. It also supports standardization across related covers, guards, and enclosure assemblies. Call Cold Headers at 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote. N/A 4-40 x 1/2 316 Stainless Steel Flat Head Socket Cap Screw is frequently selected for machine covers, enclosures, and access plates where exposed screw heads could snag or collect debris. The flat head profile is useful where exposed screw heads would create clearance problems or trap residue. The corrosion-resistant construction supports use in processing equipment where frequent cleaning can challenge ordinary hardware. The drive style gives OEM manufacturers a repeatable installation method for countersunk stainless hardware. Engineers may specify it for instrumentation, marine hardware, pump assemblies, and valve assemblies. Equipment builders can specify this listing when surface clearance and corrosion resistance are both design priorities. The listing helps buyers match a required thread and size without changing the assembly design. Call Cold Headers at 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote. N/A 4-40 x 5/8 316 Stainless Steel Flat Head Socket Cap Screw is well suited for assemblies where a countersunk hole allows the fastener head to sit level with the surrounding part. Countersunk installation can make maintenance areas cleaner and reduce catching points around removable covers. 316 stainless steel supports demanding service around salt spray, cleaning fluids, and many industrial washdown environments. The socket interface is practical for maintenance professionals working around equipment guards and enclosure hardware. Common uses include equipment panels, machine covers, inspection covers, and electrical enclosures. Industrial buyers can use the size-specific listing to reduce ambiguity during quote requests and replenishment. It is useful where documentation calls for a stainless countersunk socket fastener. Call Cold Headers at 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
Brands N/A Cold Headers, Inc.
Diameter N/A 4-40
Length N/A 1/4 in N/A 5/16 in N/A 3/8 in N/A 1/2 in N/A 5/8 in
Material N/A 316 Stainless Steel
Quantity N/A 100
Note N/A Less Than Package Quantity Specified Plus 25%.
Package Type N/A Box