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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M3-0.5 x 5 18-8 Stainless Steel Metric Button Head Socket Cap Screw
List Price (per 100 pieces) Call or Email for Pricing
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M3-0.5 x 6 18-8 Stainless Steel Metric Button Head Socket Cap Screw
List Price (per 100 pieces) $9.10
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M3-0.5 x 8 18-8 Stainless Steel Metric Button Head Socket Cap Screw
List Price (per 100 pieces) $9.15
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M3-0.5 x 10 18-8 Stainless Steel Metric Button Head Socket Cap Screw
List Price (per 100 pieces) $9.20
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M3-0.5 x 12 18-8 Stainless Steel Metric Button Head Socket Cap Screw
List Price (per 100 pieces) $9.25
Description N/A

M3-0.5 x 5 18-8 Stainless Steel Metric Button Head Socket Cap Screw is a low-profile 18-8 stainless steel metric button head socket cap screw for visible fastening points. The domed head reduces projection while the internal hex drive keeps installation access centered from the top.

Food-equipment panels, washdown-adjacent covers, and stainless access plates often use this shape for a clean visible surface. For replacement work, Cold Headers keeps the material, head style, thread pitch, length, and drive together in one listing. Button heads generally use a smaller hex key than same-diameter socket head cap screws, so confirm the listed key before assembly.

Technical Highlights

  • Head Style: Button (low-profile dome), internal hex drive
  • Material: 18-8 Stainless Steel
  • Thread Size: M3-0.5 (coarse metric pitch)
  • Length: 5 mm
  • Head Diameter: 5.70 / 5.40 mm max/min
  • Head Height: 1.65 / 1.40 mm max/min
  • Hex Key Size: 2.0 mm
  • Dimensional Standard: ISO 7380-1

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

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M3-0.5 x 6 18-8 Stainless Steel Metric Button Head Socket Cap Screw uses a smooth domed button head where a compact metric screw must be seen or touched after assembly. The domed head reduces projection while the internal hex drive keeps installation access centered from the top.

Conveyor side rails and guide assemblies use low-profile metric screws where clearance beside moving product matters. Cold Headers helps distributors, maintenance teams, and OEM buyers source exact metric socket screw sizes. In metric sourcing, 18-8 stainless is often cross-referenced with the A2 stainless material family, without adding a strength-grade claim.

Technical Highlights

  • Head Style: Button (low-profile dome), internal hex drive
  • Material: 18-8 Stainless Steel
  • Thread Size: M3-0.5 (coarse metric pitch)
  • Length: 6 mm
  • Head Diameter: 5.70 / 5.40 mm max/min
  • Head Height: 1.65 / 1.40 mm max/min
  • Hex Key Size: 2.0 mm
  • Dimensional Standard: ISO 7380-1

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

 		N/A

M3-0.5 x 8 18-8 Stainless Steel Metric Button Head Socket Cap Screw is designed for metric assemblies that need a rounded low head and internal hex drive access. The domed head reduces projection while the internal hex drive keeps installation access centered from the top.

Retail fixtures, signage frames, and display hardware often need socket access without a tall head projection. Cold Headers has supplied specialty socket fasteners since 1962 and keeps metric button head sizes clearly identified. Stainless-on-stainless threads can gall when run fast and dry, so moderate assembly speed and compatible anti-seize are common practice.

Technical Highlights

  • Head Style: Button (low-profile dome), internal hex drive
  • Material: 18-8 Stainless Steel
  • Thread Size: M3-0.5 (coarse metric pitch)
  • Length: 8 mm
  • Head Diameter: 5.70 / 5.40 mm max/min
  • Head Height: 1.65 / 1.40 mm max/min
  • Hex Key Size: 2.0 mm
  • Dimensional Standard: ISO 7380-1

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

 		N/A

M3-0.5 x 10 18-8 Stainless Steel Metric Button Head Socket Cap Screw suits stainless panels where the fastener should look finished without a tall cylindrical head. The domed head reduces projection while the internal hex drive keeps installation access centered from the top.

Commercial equipment panels and machine skins use button heads when the installed screw remains part of the visible surface. Cold Headers supports production, repair, and MRO sourcing for stainless socket products in metric sizes. Cold Headers can quote cut-to-length work for non-standard metric lengths when the catalog row does not match the print. If the print requires a full-height head instead, compare 18-8 Metric Socket Head Cap Screws in the same material family.

Technical Highlights

  • Head Style: Button (low-profile dome), internal hex drive
  • Material: 18-8 Stainless Steel
  • Thread Size: M3-0.5 (coarse metric pitch)
  • Length: 10 mm
  • Head Diameter: 5.70 / 5.40 mm max/min
  • Head Height: 1.65 / 1.40 mm max/min
  • Hex Key Size: 2.0 mm
  • Dimensional Standard: ISO 7380-1

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

 		N/A

M3-0.5 x 12 18-8 Stainless Steel Metric Button Head Socket Cap Screw gives metric equipment a broad button-head bearing surface with a clean exposed profile. The domed head reduces projection while the internal hex drive keeps installation access centered from the top.

Food-equipment panels, washdown-adjacent covers, and stainless access plates often use this shape for a clean visible surface. Cold Headers can quote metric button head requirements without steering the request toward a different head style. The smaller button-head socket is useful to know before selecting tooling for a metric maintenance kit. This metric button head size can be hard to find in small quantities, so keep the exact pitch and length together when requesting a quote.

Technical Highlights

  • Head Style: Button (low-profile dome), internal hex drive
  • Material: 18-8 Stainless Steel
  • Thread Size: M3-0.5 (coarse metric pitch)
  • Length: 12 mm
  • Head Diameter: 5.70 / 5.40 mm max/min
  • Head Height: 1.65 / 1.40 mm max/min
  • Hex Key Size: 2.0 mm
  • Dimensional Standard: ISO 7380-1

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
Brands N/A Cold Headers, Inc.
Diameter N/A M3-0.5
Length N/A 5 mm N/A 6 mm N/A 8 mm N/A 10 mm N/A 12 mm
Material N/A 18-8 Stainless Steel
Quantity N/A 100
Package Type N/A Box