Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Screws
Origin	-
Material	Alloy Steel
Strength Grade	12.9
Head Style	Socket Head Cap (Cup Head)
Drive Type	Hex Socket (Allen)
Thread Size Options	M5, M6, M8, M10, M12, M14, M16, M18, M20
Length Range	100mm to 600mm
Surface Finish	Black Oxide
Thread Pitch	Coarse (Standard)
Application	Heavy Machinery, Automotive, Structural Assembly
Package Contents	Bulk Pack (Quantity varies by selection)

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Great value for bulk

Bought a pack of M8x150mm for our workshop. Price per unit is very competitive compared to local hardware stores. Will order again.

Anonymous

Mar 26, 2026

Rating: 4/5

Solid industrial fasteners

Using these for a woodworking jig that requires high clamping force. They work great. Just make sure you have the correct metric Allen key, as the tolerance is tight.

Anonymous

Mar 20, 2026

Rating: 5/5

True Grade 12.9

As a mechanic, I can tell when steel is soft. These are genuine high-tensile bolts. Used them on a press frame reconstruction and they held up under extreme torque.

Anonymous

Mar 06, 2026

Rating: 4/5

Good quality, long lead time

The bolts themselves are excellent quality and exactly as described. The only reason for 4 stars is that shipping took a bit longer than expected for the 500mm length option.

Anonymous

Mar 06, 2026

Rating: 5/5

Exactly what I needed

Hard to find M16 bolts that are 400mm long locally. These arrived well-packaged and the threads were clean all the way to the head.

Anonymous

Mar 02, 2026

Rating: 5/5

Perfect for heavy-duty repairs

Needed some extra-long M12 bolts for a custom truck suspension lift. These 12.9 grade screws are incredibly strong and the black oxide finish looks great. Fit perfectly without any stripping.

5 FAQ

Q: Can I get these in a length of 700mm?

A: Currently, our stock for this specific listing ranges from 100mm to 600mm. We do not carry 700mm in standard inventory, but you may contact us for a special order inquiry.

Q: Do these come with washers included?

A: No, this listing is for the bolts only. Washers and nuts are sold separately. We recommend using hardened washers compatible with Grade 12.9 fasteners.

Q: Is the thread full length or partially threaded?

A: These extended hex socket screws are partially threaded. The unthreaded shank length generally equals the nominal diameter plus a few millimeters, consistent with standard ISO metric specifications for lengths over 100mm.

Q: Are these bolts suitable for outdoor use without rusting?

A: These bolts feature a black oxide coating which provides moderate corrosion resistance. For harsh outdoor environments, we recommend applying an additional layer of oil or grease, or selecting our stainless steel variants if available.

Q: What is the exact head height for the M10 size?

A: For the M10 Socket Head Cap Screws, the head height is typically 10mm, adhering to DIN 912 standards. Please refer to the detailed dimension chart in the product images for specific tolerances.

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