Class 10.9 Bolts | McMaster-Carr

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	System of Measurement System of Measurement

Metric

	Thread Size Thread Size

	Thread Pitch Thread Pitch

	Length Length

	Head Type Head Type


Hex	Socket

Rounded	Flat

T-Slot

	Threading Threading

	Fully Threaded
	Partially Threaded

	Fastener Strength Grade/Class Fastener Strength Grade/Class	Show

Class 10.9

	Fastener Strength Grade/Class Fastener Strength Grade/Class	Hide

	Material Material

Alloy Steel

Steel

	Finish Finish

Black

Black Oxide

Black Phosphate

Black Ultra-Corrosion-
Resistant Coated

Blue Dyed

Hot-Dipped Galvanized

Zinc Plated

Zinc Yellow-Chromate Plated

	Drive Style Drive Style


External Hex	Hex	Hex with Pilot Recess

	Head Width Head Width

	Thread Direction Thread Direction

	Right Hand

	Specifications Met Specifications Met

	Head Height Head Height

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	Thread Type Thread Type

Metric

	Screw Features Screw Features

	Flanged

	Tensile Strength Tensile Strength

	Thread Fit Thread Fit

Class 6g

Class 6h

	Hardness Hardness

Rockwell C32

	Countersink Angle Countersink Angle

60°

90°

	Flat Head Profile Flat Head Profile

	Standard

	Head Diameter Head Diameter

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1,763 Products

Fasteners

High-Strength Metric Class 10.9 Steel Hex Head Screws

Choose these metric screws for high-strength fastening. Often used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems, these screws are at least 25% stronger than medium-strength steel screws.

Metric High-Strength Steel Heavy Hex
Head Screws for Structural Applications

Designed for construction and exterior building applications, these metric screws are often used to join I-beams and scaffolding. Their partial threading leaves an unthreaded portion that is strong enough to stand up to the sideways forces of joints.

High-Strength Metric Class 10.9
Steel Flanged Hex Head Screws

These metric screws are at least 25% stronger than medium-strength steel screws. Use them in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. The flange distributes pressure where the screw meets the surface, so there's no need for a washer.

JIS High-Strength Steel Flanged Hex Head Screws

Made to Japanese Industrial Standards, these Class 10.9 steel screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. The flange eliminates the need for a washer.

Alloy Steel Low-Profile Socket Head Screws

Made of alloy steel, these low-profile screws are nearly twice as strong as their stainless steel counterparts. With half the height of a standard socket head, these low-profile screws fit in tight spaces.

Metric Alloy Steel Button Head Hex Drive Screws

These metric alloy steel screws are nearly twice as strong as stainless steel button head screws.

Metric Alloy Steel Flanged Button Head Screws

These metric alloy steel screws are nearly twice as strong as stainless steel button head screws. They have a flange that distributes pressure across a wide surface, eliminating the need for a separate washer.