Precision Indented Hex Head Bolts in 18-8 Stainless Steel

ISO-Compliant Manufacturing with Multi-Point Inspection and Custom Sizing

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How Can Precision Hex Head Bolts Ensure Consistent Assembly Quality in High-Volume Automotive Production?

Our indented hex head bolts are manufactured with multi-point ISO-compliant inspection including 2.5D/2D projector verification of critical dimensions. Every bolt undergoes GO/NO GO ring gage testing and across-flat/corner measurement to ensure perfect tool engagement and consistent torque application in automated assembly lines. Contact us for samples tested to your exact specifications.

With 45 years of fastener manufacturing expertise, we produce hex head bolts in sizes ranging from 1/4-20*1/2" to custom specifications, with head diameters from M1.6 to M16 and lengths from 1/8" to 12" (3.175mm to 600mm). Our manufacturing capabilities include multi-blow header technology, precision threading, and passivation processes, ensuring every bolt meets exacting quality standards with GO/NO GO ring gage verification before shipping. Whether you require standard configurations or customized special screws for specialized applications, our comprehensive production range and salt spray tested industrial fasteners deliver reliable performance for OEM manufacturers and aftermarket customers across diverse industries.

Stainless Steel Hex Head Bolt - Indented Hex Head Bolt
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Stainless Steel Hex Head Bolt

BA009-110827-2

Process: Using head-molding model to make the head be hex-shaped after head formation, and then threading before acid washing
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 the flat and corner, Length, Head height, Major diameter, Minor diameter, Thread angle, Pitch, Ring gage GO/NO GO

Features

  • Indented Hex Head
  • Bolt

Specification

  • Item Size: 1/4-20*1/2”
  • Item Material: 18-8SS Stainless Steel
  • Available Stainless Steel Material: 302HQ、 304SS 、305SS 、316SS 、410SS 、420SS 、430SS

Available Product

  • Head Diameter M1.6~M16/#00~#5/8
  • Length 1/8”~12”/3.175mm~600mm