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Home / Screws / 304 Stainless Steel Fine Thread Set Screws, Grade 12.9 Headless Hex Socket Screws, Fine Thread Machine Grub Screws M6 M8-M16

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Hardness Grade 12.9
Drive Type Hex Socket (Allen)
Head Style Headless (Grub Screw)
Thread Type Fine Thread
Available Sizes M6, M8, M10, M12, M14, M16
Surface Finish Polished
Corrosion Resistance High
Application Machinery, Automotive, Industrial Equipment
Package Contents Assorted Kit with Storage Box

6 reviews

A

Anonymous

Mar 28, 2026

Rating: 4/5

Solid choice for DIY projects

Bought these for a home repair project. They were easy to install and seem very durable. The storage box is a nice bonus for keeping them organized.

A

Anonymous

Mar 20, 2026

Rating: 5/5

Great quality stainless steel

I was worried about rust in our humid workshop, but these 304 stainless screws have held up beautifully. The fine threads provide excellent grip.

A

Anonymous

Mar 19, 2026

Rating: 5/5

Perfect for precision machinery

These fine thread set screws are exactly what I needed for my lathe projects. The 12.9 grade hardness ensures they don't strip easily, and the hex socket fits perfectly.

A

Anonymous

Mar 19, 2026

Rating: 5/5

Professional grade hardware

As a maintenance technician, I go through a lot of grub screws. These are consistently high quality with no defects in the threading or socket.

A

Anonymous

Mar 14, 2026

Rating: 4/5

Good value, fast shipping

The assortment kit is very convenient. One size was slightly tight, but overall a solid purchase for the price. Delivery was quicker than expected.

A

Anonymous

Mar 09, 2026

Rating: 5/5

Reliable for automotive use

Used these to secure pulleys on a custom engine build. They hold torque well and the headless design allows for a flush fit. Highly recommend.

5 FAQ

Q: What size Allen key do I need for the M8 screws?

A: For the M8 fine thread set screws in this set, you will typically need a 4mm hex key.

Q: Can I buy individual sizes if I run out of one?

A: Currently, we sell this item as an assorted kit only. However, please contact our sales team for bulk orders of specific sizes.

Q: Are these screws suitable for outdoor applications?

A: Yes, being made of 304 Stainless Steel, they offer high corrosion resistance and are suitable for most outdoor environments.

Q: Does the 12.9 grade mean they are brittle?

A: While Grade 12.9 indicates very high tensile strength, proper installation within torque specifications prevents brittleness issues. They are designed for heavy-duty industrial use.

Q: Is the thread pitch standard for fine threads?

A: Yes, all screws in this kit follow the ISO metric fine thread pitch standards for their respective diameters.

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