Attributes

Brand	-
Category	Industrial Small Parts / Connectors and Fasteners
Origin	-
Material	Alloy Steel
Strength Grade	12.9
Head Style	Flat Head Countersunk
Drive Type	Hex Socket
Available Sizes	M3, M4, M5, M6, M8, M10
Thread Type	Metric Coarse
Finish	Black Oxide
Standard	DIN 7991
Package Count	100 Pieces
Weight	Varies by Size

5 reviews

Anonymous

Apr 14, 2026

Rating: 5/5

True Grade 12.9

Tested the hardness and it meets specifications. Reliable supplier.

Anonymous

Mar 24, 2026

Rating: 5/5

Fast Shipping

Needed these urgently for a project. Arrived on time and worked great.

Anonymous

Mar 13, 2026

Rating: 5/5

Perfect for Machinery

Used these for equipment repair. The countersunk head sits perfectly flush.

Anonymous

Mar 07, 2026

Rating: 5/5

High Quality Fasteners

These screws hold up well under high torque. No stripping on the hex socket.

Anonymous

Feb 19, 2026

Rating: 4/5

Good Value Bulk Pack

Quality is solid. Packaging was a bit damaged but screws were fine.

5 FAQ

Q: Is the thread full length?

A: These are fully threaded flat head socket screws according to DIN 7991 standards.

Q: What size Allen key do I need for M6?

A: You will typically need a 5mm hex key for M6 socket screws.

Q: Can I get a tax invoice for bulk orders?

A: Yes, invoices are generated automatically at checkout for all business orders.

Q: Do you sell matching nuts?

A: Yes, please check our store for Grade 12.9 hex nuts compatible with these bolts.

Q: Are these suitable for outdoor use?

A: Black oxide offers mild corrosion resistance. For harsh outdoor environments, we recommend stainless steel.

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