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Nominal Size 5/16 18-8 Stainless Steel Low Head Socket Cap Screw Reference Dimensions provides reference dimensional information for the 18-8 stainless low head socket cap screw family. This row is useful when comparing nominal body diameter, head diameter, head height, hex socket size, and key engagement for the listed nominal size.

Low head socket cap screws are selected when reduced head projection is important around access panels, machine guards, tooling plates, automation equipment, instrumentation, or other compact assemblies.

The 18-8 stainless steel material is commonly chosen for general corrosion resistance, clean appearance, and routine moisture exposure in common industrial environments. For engineering departments and industrial buyers, Cold Headers helps identify low head socket screw sizes that fit specific clearance and assembly requirements.

Technical Highlights

  • Material: 18-8 Stainless Steel
  • Nominal Size: 5/16
  • Nominal Body Diameter: 0.3125 in.
  • Head Diameter: 0.431-0.437 in.
  • Head Height: 0.152-0.156 in.
  • Hex Socket Size: 0.1562 in.
  • Minimum Key Engagement: 0.120 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.

Unit of Measure

Specifications

Brands

 N/A Cold Headers, Inc.

Material

 N/A 18-8 Stainless Steel

Package Type

 N/A Box

Nominal Size

 N/A 5/16 in

Basic Screw Diameter

 N/A 0.3125 in

Maximum Head Diameter

 N/A 0.437 in

Minimum Head Diameter

 N/A 0.431 in

Maximum Head Height

 N/A 0.156 in

Minimum Head Height

 N/A 0.152 in

Hex Socket Size

 N/A 0.1562 in

Minimum Key Engagement

 N/A 0.120 in

Search

 N/A SSLHSCS.0.3125.5/16