Hex Couplings | McMaster-Carr

Filter by

System of Measurement

Thread Size

Material

Length

Hex Size

Gender

Thread Length

Shape

Hex Length

Screw Size

Threading

Pitch

For Adapting

Tensile Strength

Thread Fit

REACH Compliance

RoHS Compliance

Hardness

DFARS Compliance

Specifications Met

Finish

Drive Style

Thread Type

Thread Pitch

Pipe Size

Color

Maximum Temperature

Minimum Temperature

Dielectric Strength

Mount Type

Flammability Rating

Hole Diameter

Forward

How can we improve?

7,691 Products

Thread Adapters

Inch-to-Inch Male-Female Hex Thread Adapters

Change thread sizes or types, such as fine to coarse threads, on parts without changing gender.

Metric-to-Metric Male-Female Hex Thread Adapters

In addition to joining male- and female-threaded parts, these adapters can increase or decrease metric thread sizes and change the thread pitch.

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-NPT Male-Female Hex Thread Adapters

Inch-to-NPT Male-Female Hex
Thread Adapters with Through Hole

The through hole allows you to connect float rods to float valves.

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.

Left-Hand to Right-Hand
Female Hex Thread Adapters

Often called sleeve nuts, these thread adapters fasten parts with right-hand threads to parts with left-hand threads.

Metric-to-Metric Female Hex Thread Adapters

Increase or decrease metric thread size from one male-threaded part to another. Commonly used to connect two differently sized threaded rods, they have a hex-shaped body, so you can tighten them with 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.

Metric-to-Metric Male Hex Thread Adapters

Twist these adapters onto female metric threads to change pitch or switch thread sizes.

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.