18-8 Stainless Steel Metric Button Head Socket Cap Screws

18-8 stainless steel metric button head socket cap screws feature a smooth, low-profile rounded head with an internal hex drive for fastening in compact metric assemblies. The broad bearing surface of the button head provides a finished appearance while maintaining a lower head profile than a standard metric socket head cap screw. The internal hex socket supports installation where external wrench clearance is limited.

Manufactured from 18-8 stainless steel, these fasteners provide general corrosion resistance for many industrial environments involving ordinary moisture, humidity, or routine cleaning. They are commonly used in metric machinery, automation equipment, robotics, instrumentation, electronic assemblies, industrial enclosures, conveyor systems, fixtures, maintenance repairs, and OEM equipment where stainless construction and low-profile head geometry are specified.

Proper fastener selection should consider metric thread size, screw length, nominal body diameter, head diameter, head height, metric hex socket size, mating-thread engagement, installation clearance, and service environment. Button head socket cap screws should be selected according to the mechanical requirements of the assembly rather than substituted automatically for standard socket head, low head, or flat head fasteners.

Cold Headers supplies 18-8 stainless steel metric button head socket cap screws in a range of metric thread sizes and lengths, including uncommon and difficult-to-source configurations. Individual product pages provide verified dimensional information to help engineers, distributors, maintenance professionals, and purchasing teams identify the correct fastener.

Why Choose 18-8 Stainless Metric Button Head Socket Cap Screws?

  • Metric thread sizes: Designed for machinery and equipment using metric threaded assemblies.
  • Low-profile button head: Provides a smooth rounded profile with a broad bearing surface.
  • Internal hex drive: Allows installation with metric hex keys or hex bits.
  • 18-8 stainless steel: Offers general corrosion resistance for many industrial environments.
  • Exact-size selection: Product pages provide metric thread size, length, head dimensions, and socket size where available.

Selecting the Correct Metric Button Head Socket Cap Screw

Begin by confirming the required metric thread size and screw length. Review the head diameter, head height, metric hex socket size, available installation clearance, mating-thread engagement, and operating environment before selecting a fastener. Final material and geometry selection should reflect the mechanical and environmental requirements of the completed assembly.

Cold Headers Inc. has supplied specialty industrial socket fasteners since 1962. Our catalog helps customers locate exact metric sizes, uncommon lengths, and difficult-to-find button head socket cap screws without unsupported inventory claims.

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

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Diameter

Length (mm)

Item #

Item Name

Diameter

Length

Material

Quantity

List Price (per 100 pieces)

N/A M3-0.5 Diameter and 5 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M3-0.5 N/A 5 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M3-0.5 Diameter and 6 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M3-0.5 N/A 6 mm N/A 18-8 Stainless Steel N/A 100 $9.10
N/A M3-0.5 Diameter and 8 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M3-0.5 N/A 8 mm N/A 18-8 Stainless Steel N/A 100 $9.15
N/A M3-0.5 Diameter and 10 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M3-0.5 N/A 10 mm N/A 18-8 Stainless Steel N/A 100 $9.20
N/A M3-0.5 Diameter and 12 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M3-0.5 N/A 12 mm N/A 18-8 Stainless Steel N/A 100 $9.25
N/A M3-0.5 Diameter and 16 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M3-0.5 N/A 16 mm N/A 18-8 Stainless Steel N/A 100 $9.75
N/A M3-0.5 Diameter and 20 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M3-0.5 N/A 20 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M3-0.5 Diameter and 25 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M3-0.5 N/A 25 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M3-0.5 Diameter and 30 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M3-0.5 N/A 30 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M3-0.5 Diameter and 35 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M3-0.5 N/A 35 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M3-0.5 Diameter and 40 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M3-0.5 N/A 40 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M4-0.7 Diameter and 5 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M4-0.7 N/A 5 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M4-0.7 Diameter and 6 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M4-0.7 N/A 6 mm N/A 18-8 Stainless Steel N/A 100 $9.20
N/A M4-0.7 Diameter and 8 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M4-0.7 N/A 8 mm N/A 18-8 Stainless Steel N/A 100 $9.25
N/A M4-0.7 Diameter and 10 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M4-0.7 N/A 10 mm N/A 18-8 Stainless Steel N/A 100 $9.30
N/A M4-0.7 Diameter and 12 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M4-0.7 N/A 12 mm N/A 18-8 Stainless Steel N/A 100 $9.35
N/A M4-0.7 Diameter and 16 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M4-0.7 N/A 16 mm N/A 18-8 Stainless Steel N/A 100 $10.85
N/A M4-0.7 Diameter and 20 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M4-0.7 N/A 20 mm N/A 18-8 Stainless Steel N/A 100 $11.05
N/A M4-0.7 Diameter and 25 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M4-0.7 N/A 25 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M4-0.7 Diameter and 30 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M4-0.7 N/A 30 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M4-0.7 Diameter and 35 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M4-0.7 N/A 35 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M4-0.7 Diameter and 40 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M4-0.7 N/A 40 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M5-0.8 Diameter and 5 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M5-0.8 N/A 5 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M5-0.8 Diameter and 6 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M5-0.8 N/A 6 mm N/A 18-8 Stainless Steel N/A 100 Call or Email for Pricing
N/A M5-0.8 Diameter and 8 Millimeter (mm) Length 18-8 Stainless Steel Metric Button Head Socket Cap Screw N/A M5-0.8 N/A 8 mm N/A 18-8 Stainless Steel N/A 100 $10.30
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