H9 Grade Precision Ejector Pins for Screw Header Machines

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Why the right ejector pin matters in fastener tooling

In screw and fastener cold heading, the ejector pin (also called the KO pin) is one of the hardest-working components in the die set. After every punch cycle, it must push the formed blank out of the die cavity cleanly — without sticking, galling, or wearing prematurely. A pin that is off by even a few microns can cause inconsistent part quality, longer downtime, and higher tool replacement costs.

That is why header-machine operators do not just buy "a pin." They buy precision, material grade, and a supplier who can hold tight tolerances batch after batch.


What makes Grade H9 ejector pins a reliable choice

At Jinghong Mold, our H9 grade precision ejector pins are engineered specifically for screw header machines and cold-heading dies. The H9 material grade is selected for its balanced combination of:

  • High wear resistance under repeated impact and sliding contact
  • Good toughness to resist chipping in high-cycle production
  • Stable hardness for long tool life
  • Excellent machinability for precision finishing

The result is a pin that keeps the die set running longer and the finished screws more consistent.

Specifications covered in this range

  • Material grade: H9
  • Standard diameter range: φ0.8 mm – φ40 mm
  • Custom diameters available: φ2 mm – φ3 mm and other non-standard sizes
  • Common lengths: 40 mm, 150 mm, and custom lengths on request
  • Tolerances: down to ±0.01 mm where drawing specifies
  • Surface finish: precision ground and polished
  • Application: screw header machines, cold heading dies, fastener molds

Whether your drawing calls for a common catalog pin or a fully custom non-standard ejector pin, the blank can be matched to your die cavity and punch geometry.

Where these pins are used

Our H9 ejector pins are used across a wide range of fastener and screw production environments, including:

  • Self-tapping screw dies
  • Machine screw header tooling
  • Wood screw and drywall screw molds
  • Bolt and rivet cold heading sets
  • Automotive fastener tooling
  • Custom OEM fastener projects

If your process involves pushing a formed blank out of a closed die, the ejector pin is a critical wear item — and the material grade matters.

Why source from Jinghong Mold

Located in Dalang, Dongguan — one of China’s densest fastener and mold manufacturing clusters — Jinghong Mold has been producing precision tooling for 26 years. Our capabilities include:

  • CNC precision grinding
  • Cylindrical and surface finishing
  • EDM and wire-cut support for complex geometries
  • Heat treatment coordination
  • Dimensional inspection with micrometers, calipers, and optical measurement

We supply OEM and ODM customers directly from the factory, with no trading markup. Every pin is made to the customer’s drawing or sample, and our team communicates in English throughout quoting, production, and delivery.

Get a quote for your ejector pin set

If you are running screw header machines and need H9 grade ejector pins in standard or custom sizes, send us your drawing or the pin specifications you need replaced. We typically quote within 24 hours on weekdays.

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