McMaster-Carr

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	Finish Finish

Galvanized

Hot-Dipped Galvanized

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Material Material

Steel

	Head Type Head Type


Rounded	Hex

	Length Length

	Drive Style Drive Style

	External Hex

	Threading Threading

	Fully Threaded
	Partially Threaded

	Head Diameter Head Diameter

	Head Height Head Height

	Thread Direction Thread Direction

	Right Hand

	Rounded Head Style Rounded Head Style

	Carriage

	Thread Type Thread Type

Metric

UNC

	Thread Pitch Thread Pitch

	Fastener Strength Grade/Class Fastener Strength Grade/Class


Class 10.9	Grade 2

Grade A325

	Thread Spacing Thread Spacing

Coarse

	Tensile Strength Tensile Strength

	Screw Size Screw Size

	Tip Type Tip Type

	Pointed

	Specifications Met Specifications Met

ASME

ASTM

DIN

ISO

SAE

	Head Width Head Width

	Thread Fit Thread Fit

Class 1A

Class 2A

Class 6g

	Rounded Head Profile Rounded Head Profile

Wide

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634 Products

Fasteners

Low-Strength Steel Hex Head Screws

About half as strong as medium-strength steel screws, these screws can be used for light duty fastening applications, such as securing access panels.

Medium-Strength Steel
Heavy Hex Head Screws
for Structural Applications

The most common heavy hex head screw, these steel screws meet ASTM A325 regulations for structural joints, such as mating I-beams and scaffolding.

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.

Steel Hex Head Screws for Wood

These steel screws have corrosion-resistant finishes.

Steel Flanged Hex
Head Screws for Wood

These steel screws are hot-dipped galvanized to resist corrosion in wet environments.

Low-Strength Steel
Square-Neck Carriage Bolts

About half the strength of medium-strength bolts, these Grade 2 bolts are for light duty fastening. Carriage bolts have a smooth, rounded head for a finished look. The square neck keeps these bolts from turning when tightening a nut.