Female Standoffs | McMaster-Carr

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8,442 Products

Threaded Standoffs

Female Threaded Hex Standoffs

NAS Female Threaded Hex Standoffs

Choose these standoffs for their adherence to NAS 1831 specifications.

Female Threaded Round Standoffs

Male-Female Threaded Hex Standoffs

Position components in assemblies, as well as separate or connect parts with these standoffs.

Thread-Locking Male-Female
Threaded Hex Standoffs

A nylon patch bonded to the threads adds friction, preventing these standoffs from loosening from vibration.

NAS Male-Female Threaded Hex Standoffs

These standoffs are made to NAS specifications.

Electrical-Insulating Female Threaded Standoffs

Protect components from electrical charges.

Magnet-Backed Standoffs

The magnetic end of these standoffs makes it easy to temporarily mount or reposition components on magnetic surfaces.

Polished Female Threaded Round Standoffs

A nickel-chrome plating gives these standoffs a mirror-like finish.

Male-Female Pillar Posts

Female Pillar Posts

Sanitary Threaded Standoffs

Mount components onto food processing lines, walls, and sanitary equipment while leaving space to clean in between.

Hinged Female Threaded Round Standoffs

Hinged Male-Female Threaded Round Standoffs

Jack Screws

Secure computer cables and panels.

Press-Fit Threaded Standoffs

Press-Fit Threaded Standoffs with Closed End

Also known as captive standoffs, a recess under the hex clinches the panel for a strong hold that won't push, pull, or twist out. When mounted, the hex sits flush with the surface and the closed end creates a neat, finished appearance.

Press-Fit Threaded Standoffs with Open End

A recess under the hex clinches a panel for a strong hold that won't push, pull, or twist out. When mounted with a lever press, the hex sits flush with the surface and the open end creates a through hole.

Splined Press-Fit Threaded
Standoffs with Open End

Miniature Press-Fit Threaded
Standoffs with Open End

These standoffs are designed to fit in the limited space of compact electronics such as laptops and hand-held devices.

Crimp-On Female Threaded Round Standoffs

Often called swage standoffs because you permanently crimp them into a panel.

Coupling Nuts

18-8 Stainless Steel Coupling Nuts

These coupling nuts have good chemical resistance.

Metric 18-8 Stainless Steel Coupling Nuts

These metric coupling nuts have good chemical resistance.

Metric Super-Corrosion-Resistant
316 Stainless Steel Coupling Nuts

More corrosion resistant than 18-8 stainless steel coupling nuts, these metric nuts have excellent resistance to chemicals and salt water.

Super-Corrosion-Resistant 316
Stainless Steel Coupling Nuts

More corrosion resistant than 18-8 stainless steel coupling nuts, these nuts have excellent resistance to chemicals and salt water.

Metric Low-Strength Steel Coupling Nuts

For light duty applications, choose these metric-sized coupling nuts.

Low-Strength Steel Coupling Nuts

About half the strength of medium-strength steel coupling nuts, these nuts are for light duty fastening applications.

Left-Hand Threaded
Low-Strength Steel Coupling Nuts

The left-hand threads on these coupling nuts resists loosening from counterclockwise vibration. Use in light duty applications.

Medium-Strength Steel Coupling Nuts—Grade 5

Made from Grade 5 steel, these inch-sized coupling nuts are suitable for most applications.

Metric Medium-Strength
Steel Coupling Nuts—Class 8

Choose these locknuts to fasten standard metric threads. They’re Class 8 steel, so they can be used in most fastening applications.

High-Strength Steel Coupling Nuts—Grade 8

Made from Grade 8 steel, these nuts are about 25% stronger than medium-strength steel coupling nuts. Furnished in inch thread sizes.

Metric High-Strength Steel Coupling Nuts—Class 10

These metric-sized coupling nuts are Class 10 steel, so they’re about 25% stronger than medium-strength steel coupling nuts.

Extreme-Strength Steel Coupling Nuts

Comparable in strength to Grade 9 bolts, these coupling nuts are about 20% stronger than high-strength steel coupling nuts. Available in inch thread sizes.

Plastic Coupling Nuts

Plastic coupling nuts are chemical resistant, nonconductive, and lightweight.

Aluminum Coupling Nuts

One-third the weight of steel, aluminum coupling nuts resist corrosion in wet environments.

Brass Coupling Nuts

Brass coupling nuts are corrosion resistant in wet environments and electrically conductive.

Round Coupling Nuts

A smooth rounded body provides a finished look.

Stainless Steel Extra-Long Coupling Nuts

Stainless steel coupling nuts have excellent corrosion resistance in most environments.

Steel Extra-Long Coupling Nuts

Known for their strength, steel coupling nuts are available with a corrosion-resistant finish.

Coupling Nuts with Sight Hole

Use the sight hole to check for proper thread engagement.

Female Thread Adapters

Inch-to-Inch Female Hex Thread Adapters

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

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-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.

Male-Female 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.

Male-Female Round Universal
Thread Adapters with Through Hole

Connect male- and female-threaded parts of different thread types and sizes, while allowing air, liquids, wire, or other thin materials to pass through.

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-NPT Male-Female Hex Thread Adapters

Slotted-Drive Male-Female Round Thread Adapters

Hollow Female Threaded Rods

Connect and separate threaded rods, studs, and other components. These hollow rods have internal threads on both ends, so you can make connections and still pass wiring and other objects through the center of the rod.

Male-Female Threaded Hex Standoff Assortments

Keep a variety of standoffs in different lengths and thread sizes on hand.

Building and Machinery Hardware

Two-Piece Standoff Panel-Hanging Brackets

Fit these brackets through drilled holes in panels.

Screw-Grip Standoff Panel-Hanging Brackets

No need to drill holes in panels—tighten the set screw to hold them in place.

Low-Profile Threaded Standoff Caps

A thin head means these caps sit nearly flush with your surface for a clean look.

Tamper-Resistant Threaded Standoff Caps

Pin holes on the side of these caps let you insert an installation tool for increased leverage when tightening, making them difficult to remove.

Threaded Adapters for Pullers

Use adapters on the ends of forcing screws and face-grip puller legs when pulling shafts, bearing caps, and pinions.

Thread Adapters for Drum Openings

Convert drum openings with metric or BSPP threads to a 2 NPT pipe size.