5/8"-18 Threaded Rods | McMaster-Carr

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Specifications Met Specifications Met

ASTM A108

	Thread Length Thread Length

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Mechanical Finish Mechanical Finish

Polished

Precision Ground

Turned

	Nut Type Nut Type


Hex	Coupling

	For Motion Type For Motion Type

	Linear
	Rotary

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About Shafts

High-Strength Steel Threaded Rods

These are Grade 8 threaded rods.

Medium-Strength Steel Threaded Rods—Grade B7

These Grade B7 threaded rods meet the pressure and temperature requirements of ASTM A193 and are often used to secure pressure tanks, valves, and flanges.

Left-Hand Threaded Medium-Strength
Steel Threaded Rods—Grade B7

Tighten these threaded rods by turning them to the left; once fastened, they resist loosening from counterclockwise motion.

Low-Strength Steel Threaded Rods

About half the strength of medium-strength steel threaded rods, use these for light duty hanging, mounting, and fastening.

18-8 Stainless Steel Threaded Rods

18-8 stainless steel threaded rods have good chemical resistance.

18-8 Stainless Steel Threaded Rods—Grade B8

Grade B8 threaded rods meet the pressure and temperature requirements of ASTM A193 and are often used to secure pressure tanks, valves, and flanges. They have good chemical resistance.

Super-Corrosion-Resistant 316
Stainless Steel Threaded Rods

More corrosion resistant than 18-8 and 410 stainless steel threaded rods, these 316 stainless steel rods have excellent resistance to chemicals and salt water.

Brass Threaded Rods

Brass threaded rods are corrosion resistant in wet environments, electrically conductive, and nonmagnetic.

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.

Medium-Strength Steel Coupling Nuts—Grade 5

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

18-8 Stainless Steel Coupling Nuts

These coupling nuts have good chemical resistance.

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.

Brass Coupling Nuts

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

Stainless Steel Extra-Long Coupling Nuts

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

Round Coupling Nuts

A smooth rounded body provides a finished look.

Inch-to-Inch Female Hex Thread Adapters

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

Power Transmission

Connecting Rods

Designed for use with right-hand, internally threaded rod ends, these rods have right-hand threads on both ends. Use them for remote valve operators, throttle controllers, shifting mechanisms, and virtually any push/pull assembly.

Internally Threaded Connecting Rods

Designed for use with right-hand, externally threaded rod ends, these rods have right-hand threads on both ends. Use them for remote valve operators, throttle controllers, shifting mechanisms, and virtually any push/pull assembly.

Turnbuckle-Style Connecting Rods

Similar to turnbuckles, these rods have right-hand threads on one end and left-hand threads on the other so you can make a linkage that adjusts for tension. Add right- and left-hand threaded rod ends to build your linkages.

Internally Threaded Turnbuckle-Style Connecting Rods

Similar to turnbuckles, these rods have right-hand threads on one end and left-hand threads on the other so you can make a linkage that adjusts for tension.

Threaded Linear Motion Shafts

Mount these externally threaded shafts into tapped holes rather than using a shaft support, or attach a hex nut, shaft collar, or other threaded accessory.

Tapped Linear Motion Shafts

Internal threads allow you to mount these shafts onto threaded studs and fasteners, no shaft supports needed.

Threaded Rotary Shafts

Attach threaded accessories, such as mixer propellers and fan blades, to the end of these shafts.

Tapped Rotary Shafts

Connect these internally threaded shafts directly to threaded components, or use a fastener to secure.

About Shafts

Threaded Rods

High-Strength Steel Threaded Rods

Medium-Strength Steel Threaded Rods—Grade B7

Left-Hand Threaded Medium-StrengthSteel Threaded Rods—Grade B7

Low-Strength Steel Threaded Rods

18-8 Stainless Steel Threaded Rods

18-8 Stainless Steel Threaded Rods—Grade B8

Super-Corrosion-Resistant 316Stainless Steel Threaded Rods

Brass Threaded Rods

Coupling Nuts

Low-Strength Steel Coupling Nuts

Medium-Strength Steel Coupling Nuts—Grade 5

High-Strength Steel Coupling Nuts—Grade 8

18-8 Stainless Steel Coupling Nuts

Super-Corrosion-Resistant 316Stainless Steel Coupling Nuts

Brass Coupling Nuts

Stainless Steel Extra-Long Coupling Nuts

Round Coupling Nuts

Inch-to-Inch Female Hex Thread Adapters

Inch-to-Inch Female Hex Thread Adapters

Power Transmission

Connecting Rods

Internally Threaded Connecting Rods

Turnbuckle-Style Connecting Rods

Internally Threaded Turnbuckle-Style Connecting Rods

Threaded Linear Motion Shafts

Tapped Linear Motion Shafts

Threaded Rotary Shafts

Tapped Rotary Shafts

Left-Hand Threaded Medium-Strength
Steel Threaded Rods—Grade B7

Super-Corrosion-Resistant 316
Stainless Steel Threaded Rods

Super-Corrosion-Resistant 316
Stainless Steel Coupling Nuts