DIN479 Square Head Set Screw Lathe Tool Post Bolt for Machine Tool Fixture

Product Brief :

Qimao Metal Manufacturer DIN479 Square Head Set Screw Lathe Tool Post Bolt for Machine Tool Fixture from Qimao Metal Manufacturer. The square head is the whole point. You can get a wrench on it from the side, in a tight spot where a socket screw would be a pain to reach. That is why tool post manufacturers have used this standard for decades.

We make these in carbon steel. Threads are rolled, not cut, which gives you a stronger grain structure. That matters when you are locking a tool holder and the screw takes repeated torque. Available in standard metric sizes, M6 through M20. Custom lengths if you need them. Black oxide or plain finish.

It is not a complicated part. But a bad one will strip or loosen and ruin your setup. We make sure that does not happen.

Key Specs & Dimensions:

Product Name:	Item No.:	Material:	Measurement(mm):			Surface Finish:	Weight(g):
			L:	Nut:	D:
DIN479 Square Head Set Screw Lathe Tool Post Bolt for Machine Tool Fixture	QM9050	Steel	45.5	M6	8/3.8	Polish	10.24

Product Details：

DIN479 Square Head Set Screw Lathe Tool Post Bolt for Machine Tool Fixture. Carbon steel, grade 4.8 or 8.8. Metric threads, M6 to M20, coarse or fine pitch. Lengths from 10mm to 120mm. Square head machined to DIN tolerances so a wrench seats properly and you can torque it down without rounding corners. Threads are rolled, not cut — stronger grain structure, less likely to strip under repeated tightening. Plain or black oxide finish. Hardness verified per batch before shipping. It fits standard lathe tool posts and machine fixtures directly. No modification needed. Custom sizes available if you send a drawing or sample. Packed in bulk cartons or custom labeled bags. MOQ negotiable, samples accepted.

Key Features:

• DIN479 Square Head Set Screw Lathe Tool Post Bolt for Machine Tool Fixture of Square head for high torque. A wrench seats properly. You can tighten firmly without the head deforming or the tool slipping.

• Rolled threads. Stronger than cut threads. Better resistance to stripping under repeated use.

• Fits standard tool posts. DIN479 dimensions mean it drops into existing equipment without modification.

• Available in multiple grades. Grade 4.8 for general work. Grade 8.8 when you need more holding power.

• Custom sizes on request. We can match your drawing or sample for length, thread, and finish.

Where This Gets Used

• The DIN479 Square Head Set Screw Lathe Tool Post Bolt for Machine Tool Fixture for Lathe tool posts. The classic application. Locks the tool holder and sets tool height.

• Machine fixtures and jigs. Anywhere you need a solid, adjustable stop or clamp point that you can access from the side.

• Milling and drilling setups. Holding workpieces against cutting forces.

• Older machine maintenance. Many older lathes and mills use DIN479 hardware. Sourcing replacements is straightforward with this standard.

• General mechanical assembly. Wherever a square-head screw solves an access problem that a hex or socket screw cannot.

Our Manufacturing Approach

We have been making fasteners for a long time. DIN479 Square Head Set Screw Lathe Tool Post Bolt for Machine Tool Fixture are one of our standard lines.

What we control:

• Material sourcing. We know the mill and the heat lot.

• Thread rolling on automatic machines. Consistent pitch and major diameter.

• Head forming to DIN dimensions. Wrench fits properly.

• Batch inspection. Thread gauges, head measurement, hardness check.

What this means for you:

• Parts that fit. No rework. No returns because the wrench does not seat.

• Consistent quality across orders. The hundredth piece works like the first.

• Straight answers on lead time and pricing. We are a factory, not a trading company.

We handle small trial orders and larger production runs. Send a drawing or sample if you need something non-standard.

Installation Notes

Installation DIN479 Square Head Set Screw Lathe Tool Post Bolt for Machine Tool Fixture is simple. Getting it right the first time saves you a stripped thread.

1. Check the thread size and pitch. DIN479 Square Head Set Screw Lathe Tool Post Bolt for Machine Tool Fixture comes in coarse and fine. Match your tool post or fixture.

2. Clean the hole. Chips or burrs will cause cross-threading. Blow it out or run a tap through.

3. Start by hand. Thread it in two or three turns by hand before you put a wrench on it. If it binds, stop. Do not force it.

4. Tighten with the right wrench. A proper-fitting open-end or adjustable wrench. Snug it down. You want it firm, not gorilla-tight. Grade 4.8 will strip if you overdo it.

5. Recheck after first use. Vibration can settle the screw. A quarter-turn after the first run is common practice.

6. Replace worn screws. If the threads look flattened or the head is chewed up, swap it. A loose tool post screw is a bad day waiting to happen.

For screws that get adjusted frequently, a touch of light oil or anti-seize keeps them moving freely without loosening under vibration.