7/8"-9 Nuts | McMaster-Carr

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Cadmium Yellow-Chromate Plated

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ASME Interference Class 5

Unified Standard Class 2A

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Compliant with Exemptions

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210 Products

Hex Nuts

Standard Profile About Standard Profile

Hex Nuts

The most common hex nuts for fastening machinery and equipment

23 products

Left-Hand-Thread Hex Nuts

Tighten when turned to the left to prevent counterclockwise-moving parts from loosening

5 products

Thin Profile About Thin Profile

Thin-Profile Hex Nuts

About half the height of standard nuts to fit in spaces with low clearance

9 products

Left-Hand-Thread Thin-Profile Hex Nuts

Tighten when turned to the left to prevent counterclockwise-moving parts from loosening

2 products

Heavy Profile About Heavy Profile

Heavy-Profile Hex Nuts

About 10% wider and taller than standard nuts to handle heavier loads

10 products

Heavy-Profile Hex Nuts for High-Pressure Applications

Secure ASTM A193 screws and are wider and taller than standard nuts to handle heavier loads

4 products

Structural Heavy-Profile Hex Nuts

Secure ASTM A325 screws in structural joints, such as I-beams, columns, and joists

6 products

Thin-Heavy Profile About Thin-Heavy Profile

Thin-Heavy-Profile Hex Nuts

Fit in low-clearance spaces and handle heavier loads than standard nuts

5 products

Other Products

Locknuts

Hold fasteners in place to prevent loosening from vibration

31 products

Flange Nuts

The flange distributes pressure, so you don't need a washer

8 products

Coupling Nuts

Connect and extend threaded rods

13 products

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

7 products

Square Nuts

Flat sides won’t spin in channels and square holes

4 products

Socket Nuts

Install in recessed holes and tight spots where a wrench won’t fit; also known as Allen nuts

1 product

Split Nuts

Swivel to attach at any point on a threaded rod for quick installation

1 product

T-Slot Nuts

Combine with setup studs or bolts to mount fixtures to machine tables

8 products

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

2 products

Thread Adapters

Join threads of a different type, size, and gender

13 products

Turnbuckles

Twist the body or end fittings to adjust the length and tension of attached rope and chain

5 products

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

3 products

T-Slot Bolts

Secure clamps and workpieces to machine tables with quicker setup than a T-slot nut and stud

5 products

Threaded Inserts

Create new threads or repair stripped threads

17 products

Setup Studs

Secure setup clamps and fixtures to your machine table or assemble heavy machines

16 products

Fixturing Kits

Everything needed to mount workpieces of different sizes to your machine table

3 products