M12 Shafts | McMaster-Carr

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	System of Measurement System of Measurement

Metric

	Thread Size Thread Size	Show

M12

	Thread Size Thread Size	Hide

	Thread Pitch Thread Pitch

	Diameter Diameter

	Length Length

	End Type End Type


Straight	Keyed

Made to Order	Tapped

Threaded	D-Profile

With Retaining Ring Grooves	Step Down

	Material Material

	Mechanical Finish Mechanical Finish

Precision Ground

Polished

Turned

	Edge Type Edge Type

	Chamfered

	Thread Length Thread Length

	For Motion Type For Motion Type

	Rotary
	Linear

	Hardness Rating Hardness Rating

Medium

Hard

Very Hard

	Hardness Hardness

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Yield Strength Yield Strength

10,000 to 19,999 psi

20,000 to 99,999 psi

	Heat Treatment Heat Treatment

Case Hardened

Annealed (Softened)

Hardened

	Threading Threading

Threaded on Both Ends

Fully Threaded

Threaded on One End

	Step Length Step Length

24mm

Made to Order

	Thread Direction Thread Direction

Right Hand

Right Hand and Left Hand

Left Hand

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

REACH Compliant

	Surface Smoothness Surface Smoothness

9 microinch

16 microinch

	Surface Yield Strength Surface Yield Strength

430 Products

Rotary Shafts

Keyed Rotary Shafts

Combine with a machine key to transmit torque to gears, sprockets, and other power transmission components.

D-Profile Rotary Shafts

A flat surface area allows set screws to dig into the shaft for securely mounting gears, sprockets, and bearings.

Tapped Rotary Shafts

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

Thread-Mount Idler Rotary Shafts

Thread these shafts into a tapped hole to support idler sprockets and pulleys in tensioning applications. They have a retaining-ring groove, retaining ring, and spacers to position your component and hold it in place.

Threaded Rotary Shafts

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

Step-Down Rotary Shafts

A shoulder near the end of the shaft provides a stop for gears, sprockets, and bearings.

Rotary Shafts with Retaining Ring Grooves

Clip retaining rings into the grooves to separate and position gears, sprockets, and bearings.

Linear Motion Shafts

Tapped Linear Motion Shafts

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

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.

Step-Down Linear Motion Shafts

A shoulder near the end of the shaft allows for easy positioning of housings, shaft supports, and collars.

Linear Motion Shafts with Retaining Ring Grooves

Clip retaining rings into the grooves to separate and position collars, supports, and housings.

Threaded Rods

Metric High-Strength Steel Threaded Rods—Class 10.9

These Class 10.9 steel threaded rods are about 25% stronger than medium-strength steel rods.

Metric Very-High-Strength Steel
Threaded Rods—Class 12.9

Class 12.9 rods are about 20% stronger than Class 10.9 threaded rods and are for use in heavy machinery.

Metric Medium-Strength Steel
Threaded Rods—Grade B7

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

Metric Fine-Thread Medium-Strength
Steel Threaded Rods—Grade B7

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

Medium-Strength Steel Threaded Rods—Class 8.8

An economical alternative to Grade B7 and Grade B16 threaded rods, these metric Class 8.8 rods are suitable for fastening most machinery and equipment.

Metric Low-Strength Steel Threaded Rods

These metric threaded rods are about half the strength of medium-strength steel threaded rods for light duty hanging, mounting, and fastening.

Metric Fine-Thread Low-Strength Steel Threaded Rods

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

Metric Left-Hand Threaded
Low-Strength Steel Threaded Rods

These metric threaded rods tighten when turned to the left; once fastened, they resist loosening from counterclockwise motion. About half the strength of medium-strength steel threaded rods, use them for light duty hanging, mounting, and fastening.

Metric 18-8 Stainless Steel Threaded Rods

Available in metric sizes, these 18-8 stainless steel threaded rods have good chemical resistance.

Metric Super-Corrosion-Resistant
316 Stainless Steel Threaded Rods

These metric 316 stainless steel threaded rods are more corrosion resistant than 18-8 and 410 stainless steel threaded rods and have excellent resistance to chemicals and salt water.

Metric Nylon Threaded Rods

These metric threaded rods are made from nylon 6/6 and resist oil, grease, and solvents. They’re nonconductive, making them good for use around sensitive electrical components.

Fiberglass Threaded Rods

Fiberglass threaded rods are stronger than nylon threaded rods. They resist acids, solvents, salt water, and oil.

Metric Brass Threaded Rods

These metric brass threaded rods are corrosion resistant in wet environments, electrically conductive, and nonmagnetic.

Metric Partially Threaded Studs

Screw the threaded end of these metric studs into a tapped hole and use the unthreaded end as a pivot point, hinge, shaft, or locator pin.

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.

Lead Screws and Screw Jacks

Metric Fast-Travel Ultra-Precision
Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start.

Metric Precision Lead Screws and Nuts

Also known as trapezoidal-thread lead screws and nuts.

Metric Ball Screws and Nuts

Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. Also known as single-start metric ball screws and nuts, these have a single thread that runs the length of the screw.

Metric Lead Screws and Nuts

These metric lead screws and nuts have broad, square threads that are well suited for quick assembly, high clamping forces, and lifting and lowering heavy objects. They're commonly found in hand-powered clamps, vises, grates, doors, and work tables.

Lever Handles

An easy-to-grip ball knob makes these handles a good replacement for gear levers. Use them to operate machinery.

Ball-Lever Shafts

Attach a ball knob to one of these shafts to create custom handles for operating machinery.

Setup Studs

Secure setup clamps and fixtures to your machine table, or assemble heavy machines, such as engine mounts.

Vibration-Resistant Setup Studs

Also known as tap-end and fixture studs, these rods have friction-fit threads on one end to resist loosening and standard threads on the other side for attaching a nut.