| Items |
 /Asset/316 Button Head Socket Cap.png BHCS-316 4-40 x 1/4 4-40 x 1/4 316 Stainless Steel Button Head Socket Cap Screw List Price (per 100 pieces) $35.00
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/Asset/316 Button Head Socket Cap.png BHCS-316 4-40 x 5/16 4-40 x 5/16 316 Stainless Steel Button Head Socket Cap Screw List Price (per 100 pieces) $36.00
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/Asset/316 Button Head Socket Cap.png BHCS-316 4-40 x 3/8 4-40 x 3/8 316 Stainless Steel Button Head Socket Cap Screw List Price (per 100 pieces) $37.00
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/Asset/316 Button Head Socket Cap.png BHCS-316 4-40 x 1/2 4-40 x 1/2 316 Stainless Steel Button Head Socket Cap Screw List Price (per 100 pieces) $39.00
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/Asset/316 Button Head Socket Cap.png BHCS-316 4-40 x 5/8 4-40 x 5/8 316 Stainless Steel Button Head Socket Cap Screw List Price (per 100 pieces) $40.00
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| Description |
4-40 x 1/4 316 Stainless Steel Button Head Socket Cap Screw is commonly specified where a smooth, low rounded head is needed on hardware exposed to washdown, moisture, or corrosive service. 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 marine equipment and dock hardware, where the rounded head helps reduce snag points while 316 stainless steel supports saltwater and coastal exposure. It can also serve instrumentation and control equipment, where the button head provides a finished appearance on visible panels and enclosure hardware. The button-head geometry is different from a standard socket head cap screw: it keeps a lower, rounded profile while still providing socket engagement. For the 4-40 thread and 1/4 in. length, the reference head diameter is 0.201-0.213 in. and the head height is 0.051-0.059 in. Use the verified head dimensions below when checking surface projection, socket access, and replacement fit. Technical Highlights
Reference dimensions may vary slightly by manufacturer. Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote. |
4-40 x 5/16 316 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 pump assemblies and valve systems, where the internal hex drive allows controlled installation around compact housings and service covers. It can also serve commercial equipment and outdoor hardware, where 316 stainless steel is useful where humidity, weather, or cleaning exposure may be present. Engineers choose the button head when the screw remains above the surface and a smoother exposed appearance is preferred. For the 4-40 thread and 5/16 in. length, the reference head diameter is 0.201-0.213 in. and the head height is 0.051-0.059 in. The reference dimensions below help engineering and purchasing teams compare head height, head diameter, and hex-key requirements. Technical Highlights
Reference dimensions may vary slightly by manufacturer. Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote. |
4-40 x 3/8 316 Stainless Steel Button Head Socket Cap Screw is selected when a compact rounded head profile and stainless construction are both important to the assembly. 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 food processing and washdown equipment, where the smooth exposed profile is practical on covers, guards, and panels that are cleaned frequently. It can also serve marine equipment and dock hardware, where the rounded head helps reduce snag points while 316 stainless steel supports saltwater and coastal exposure. The broad bearing surface and compact head profile make this style useful where covers, guards, or panels are handled during service. For the 4-40 thread and 3/8 in. length, the reference head diameter is 0.201-0.213 in. and the head height is 0.051-0.059 in. The technical highlights below support fit checks for covers, guarded openings, and stainless replacement hardware. Technical Highlights
Reference dimensions may vary slightly by manufacturer. Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote. |
4-40 x 1/2 316 Stainless Steel Button Head Socket Cap Screw supports exposed fastening points where appearance, internal hex access, and resistance to corrosion-prone environments all matter. 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 chemical processing and water treatment systems, where the material is often selected for additional corrosion resistance in wet industrial service. It can also serve chemical processing and water treatment systems, where the material is often selected for additional corrosion resistance in wet industrial service. Because the drive is internal, installers can tighten the fastener without side clearance for an external wrench. For the 4-40 thread and 1/2 in. length, the reference head diameter is 0.201-0.213 in. and the head height is 0.051-0.059 in. These values help buyers and maintenance teams confirm the correct thread, length, drive size, and head geometry. Technical Highlights
Reference dimensions may vary slightly by manufacturer. Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote. |
4-40 x 5/8 316 Stainless Steel Button Head Socket Cap Screw is used when the fastener head remains visible and the surrounding equipment benefits from 316 stainless steel construction. 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 instrumentation and control equipment, where the button head provides a finished appearance on visible panels and enclosure hardware. It can also serve machine building and maintenance repair, where the defined size helps match drawings, replacement hardware, and existing stainless assemblies. 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 5/8 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
Reference dimensions may vary slightly by manufacturer. Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote. |
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| Brands | Cold Headers, Inc. | |||||||||
| Diameter | 4-40 | |||||||||
| Length | 1/4 in | 5/16 in | 3/8 in | 1/2 in | 5/8 in | |||||
| Material | 316 Stainless Steel | |||||||||
| Quantity | 100 | |||||||||
| Note | Less Than Package Quantity Specified Plus 25%. | |||||||||
| Package Type | Box | |||||||||
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