McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size	Show

1/2"-20

	Thread Size Thread Size	Hide

	Material Material

Aluminum

Stainless Steel

Steel

	Hex Length Hex Length

	Gender Gender


Female	Male

	Thread Length Thread Length

	For Adapting For Adapting

Thread Size

Gender

	Hex Size Hex Size

	Shape Shape

	Hex

	Thread Fit Thread Fit

	Tensile Strength Tensile Strength

20,000 to 49,999 psi

50,000 to 99,999 psi

Not Rated

	Drive Style Drive Style

	External Hex

	Hardness Hardness

	Specifications Met Specifications Met

ASTM

SAE

	Finish Finish

Zinc Plated

Black Oxide

	Nut Type Nut Type


Coupling	Hex

	Pitch Pitch

	Length Length

1 1/4"

1 3/4"

	Width Width

5/8"

11/16"

3/4"

	Threading Threading

	Fully Threaded
	Partially Threaded

	Thread Direction Thread Direction

	Right Hand

	Thread Type Thread Type

UNF

	Thread Spacing Thread Spacing

Fine

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232 Products

Thread Adapters

Inch-to-Inch Male-Female
Hex Thread Adapters

Join threads with small diameters to large or course threads to fine with these inch-sized adapters.

Inch-to-Metric Male-Female
Hex Thread Adapters

Change inch threads to metric with these adapters, or swap metric threads for inch. An external hex lets you tighten or loosen them with a wrench.

Inch-to-Inch Female
Hex Thread Adapters

Connect two differently sized male-threaded parts, such as threaded rods, and tighten with a standard wrench.

Inch-to-Metric Female
Hex Thread Adapters

Adapt threaded rods from inch to metric. These adapters connect two male-threaded fasteners, so you can change the gender of a mating part or increase or decrease its thread size. The hex-shaped body fits into the head of a standard wrench.

Inch-to-Inch Male
Hex Thread Adapters

Need to join two female-threaded parts, such as coupling nuts, with dissimilar inch thread sizes? Attach them to these adapters and tighten the exterior hex nut for a secure connection.

Inch-to-Metric Male
Hex Thread Adapters

One side inch, one side metric, and a hex in the middle—these handy fasteners connect two female-threaded parts, such as coupling nuts, adapting from inch threads to metric. Tighten with a standard wrench.