Precision Socket Head Cap Screws with Machine Thread

ISO-Compliant 18-8 Stainless Steel Hex Socket Cap Screws

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Need Socket Head Cap Screws That Meet Strict Automotive Assembly Tolerances?

Our 18-8 stainless steel socket head cap screws are manufactured with multi-blow header precision and undergo comprehensive ISO-compliant inspection of all critical dimensions including internal hex accuracy, thread specifications, and head height. With rigorous measurement using 2.5D projectors and ring gage GO/NO GO testing, we ensure every fastener meets your exact assembly requirements. Contact us for samples and detailed dimensional reports tailored to your automotive applications.

With 45 years of fastener manufacturing expertise, we deliver socket head cap screws that meet the demanding requirements of OEM manufacturers across automotive, machinery, electronics, and precision equipment industries. Our rigorous quality control process inspects every critical dimension—from across flat and corner measurements of the internal hex to thread length, major and minor diameters, thread angle, and ring gage GO/NO GO testing—ensuring consistent performance and reliability. These machine screws feature both hex socket configurations with standard heads and Phillips recess options with low-head profiles, providing versatile fastening solutions for specialized applications requiring superior strength, corrosion resistance, and precision assembly.

Socket Head Cap Screw - Socket Head Cap Screw w/Machine Thread
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Socket Head Cap Screw

MV003-150221-1

Process: Using multi blow headers to make the head then threading before passivation
All the items are inspected during the process and before shipping, complying with ISO Working Instruction
Inspection Tools: Calipers, Protrusion-height gage, Micrometer, 2.5D and 2D projector
Measurement Points: Across flat of the internal hex, Across corner of the internal hex, Head height, Thread length, Major diameter, Minor diameter, Thread angle, Pitch, Ring gage GO/NO GO

Features

  • Hex Socket with Head
  • Phillips Recess w/Low Head

Specification

  • Item Specification: #1/4-20*3/8
  • Item Material: 18-8 SS