4-40 x 1 3/4 316 Stainless Steel Button Head Socket Cap Screw helps engineers combine reduced head projection with 316 stainless steel corrosion resistance in equipment that sees moisture or cleaning cycles. The button-head design gives engineers a compact rounded profile, a broad bearing surface, and internal hex drive access, while the 316 stainless steel material is selected where additional corrosion resistance is needed compared with general-purpose stainless grades.

Typical applications include high-humidity equipment and valve enclosures, where the head geometry keeps exposed hardware smooth while preserving socket access. It can also serve pump assemblies and valve systems, where the internal hex drive allows controlled installation around compact housings and service covers. This style is chosen where the rounded head should remain visible, accessible, and smoother than many taller head forms.

For the 4-40 thread and 1 3/4 in. length, the reference head diameter is 0.201-0.213 in. and the head height is 0.051-0.059 in. The listed dimensions provide a concise reference for head clearance, tool selection, and part identification.

Technical Highlights

• Material: 316 Stainless Steel
• Thread Size: 4-40
• Length: 1 3/4 in.
• Nominal Body Diameter: #4 (.112 in.)
• Head Diameter: 0.201-0.213 in.
• Head Height: 0.051-0.059 in.
• Hex-Key Size: 1/16 in.
• Drive Type: Internal Hex

Reference dimensions may vary slightly by manufacturer.

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