M14 Bushings | McMaster-Carr

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	System of Measurement System of Measurement

Metric

	Thread Size Thread Size	Show

M14

	Thread Size Thread Size	Hide

	Thread Pitch Thread Pitch

	Thread Type Thread Type

Metric

Metric Ball

	Threaded Insert Type Threaded Insert Type


Key Locking	Helical

Thread Locking

	For Spark Plug Reach For Spark Plug Reach

	Nut Type Nut Type


Flange	Locknut

Platform	Round

Socket Head

	Material Material

Stainless Steel

Steel

	Number of Inserts Included Number of Inserts Included

	Component Component

	Ball Nut

	Thread Direction Thread Direction

	Right Hand

	Height Height

21.3mm

24mm

30mm

	Width Width

	Diameter Diameter

31 mm

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	OD OD

20mm

24mm

30mm

	For Use In For Use In

Metal

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	Helical Insert Style Helical Insert Style

With Prong

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Travel Distance per Turn Travel Distance per Turn

4 mm

	Installed Length Installed Length

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

REACH Compliant

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46 Products

About Shaft Collars

Shaft collars are useful for holding and positioning components on a shaft. They can also serve as mechanical stops and stroke limiters.

Selecting Compatible Lead Screws and Nuts

About Washers

About Nuts, Materials, and Finishes

How to Install Key-Locking Inserts

How to Install Helical Inserts

About Helical Insert Length

These nuts are chemical resistant and may be mildly magnetic. Also known as Allen nuts, use them with socket head cap screws in recessed holes and tight spaces that don't have enough clearance for a wrench. Tighten them with a 6-point hex key. They can also be used as an insert by pressing or drawing them into nonhardened steel, cast iron, or soft nonferrous metal or by molding them into plastic, ceramic, fiber, and similar materials.

For technical drawings and 3-D models, click on a part number.

18-8 Stainless Steel
Thread Size	Thread Pitch	OD	Ht.	Threading	Thread Dp.	For Hole Dia.	Hex Key Size		Each
M14	2mm	20mm	21.3mm	Partially Threaded	11.4mm	21.1mm	1/2"	000000000	000000

Alloy Steel Socket Nuts

Also known as Allen nuts, use these with socket head cap screws in recessed holes and tight spaces that don't have enough clearance for a wrench. Tighten them with a 6-point hex key. They can also be used as an insert by pressing or drawing them into nonhardened steel, cast iron, or soft nonferrous metal or by molding them into plastic, ceramic, fiber, and similar materials. Made from alloy steel, they're comparable in strength to Grade 9 bolts.

For technical drawings and 3-D models, click on a part number.

Alloy Steel
Thread Size	Thread Pitch	OD	Ht.	Threading	Thread Dp.	For Hole Dia.	Hex Key Size		Each
M14	2 mm	20mm	24mm	Partially Threaded	11.4mm	21.1mm	1/2"	000000000	000000

Black-Phosphate Steel Key-Locking Inserts

A black-phosphate finish provides mild corrosion resistance. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or change threads in soft metals such as aluminum. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.

Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole with stripped threads.

For technical drawings and 3-D models, click on a part number.

Metric

Inserts
			For Tap							Each		Installation Tools
Thread Size	Thread Pitch, mm	Thread Spacing	Thread Size	Thread Pitch, mm	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	No. of Locking Keys		1-9	10-Up		Each
Black-Phosphate Steel with Thick Wall
M14	2	Coarse	7/8"-14	__	0.81"	53/64"	53/64"	4	000000000	00000	00000	000000000	000000
M14	2	Coarse	M20	1.5	20mm	18.75 mm	18.75mm	4	000000000	00000	00000	000000000	00000
M14	1.5	Fine	M20	1.5	20mm	18.75 mm	18.75mm	4	000000000	00000	00000	000000000	00000

18-8 Stainless Steel Key-Locking Inserts

Made of stainless steel, these inserts have good corrosion resistance. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or change threads in soft metals such as aluminum. Inserts may be mildly magnetic. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.

Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.

For technical drawings and 3-D models, click on a part number.

Metric

Inserts
			For Tap							Each		Installation Tools
Thread Size	Thread Pitch, mm	Thread Spacing	Thread Size	Thread Pitch, mm	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	No. of Locking Keys		1-9	10-Up		Each
18-8 Stainless Steel with Thick Wall
M14	2	Coarse	7/8"-14	__	0.81"	53/64"	0.828"	4	000000000	000000	000000	000000000	000000
M14	2	Coarse	M20	1.5	20mm	18.75 mm	18.75mm	4	000000000	00000	00000	000000000	00000
M14	1.5	Fine	M20	1.5	20mm	18.75 mm	18.75mm	4	000000000	00000	00000	000000000	00000

Key-Locking Inserts with Installation Tool

Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. These inserts are used to repair or convert threads in soft metals such as aluminum. They’re comparable to Keensert® inserts.

18-8 stainless steel inserts are more corrosion resistant than black-phosphate steel. They may be mildly magnetic.

Black-phosphate steel inserts are mildly corrosion resistant.

Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.

For technical drawings and 3-D models, click on a part number.

Metric

			For Tap
Thread Size	Thread Pitch, mm	Thread Spacing	Thread Size	Thread Pitch, mm	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	No. of Locking Keys	No. of Inserts Included		Each
18-8 Stainless Steel with Thick Wall
M14	2	Coarse	M20	1.5	20mm	18.75 mm	18.75mm	4	4	000000000	0000000
M14	1.5	Fine	M20	1.5	20mm	18.75 mm	18.75mm	4	4	000000000	000000
Black-Phosphate Steel with Thick Wall
M14	2	Coarse	7/8"-14	__	0.81"	53/64"	53/64"	4	3	000000000	00000
M14	2	Coarse	M20	1.5	20mm	18.75 mm	18.75mm	4	4	000000000	00000
M14	1.5	Fine	M20	1.5	20mm	18.75 mm	18.75mm	4	4	000000000	00000

Stainless Steel Helical Inserts

Also known as Heli-Coil inserts, these inserts have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.

Inserts that meet DIN 8140 adhere to international standards for dimensions.

For technical drawings and 3-D models, click on a part number.

Metric

Inserts										Through-Hole Taps		Closed-End Hole Taps		Installation Tools
Thread Size	Thread Pitch, mm	Thread Spacing	Installed Lg., mm	Drill Bit Size	For Max. Hole Dia.	Specifications Met	Pkg. Qty.		Pkg.		Each		Each		Each
18-8 Stainless Steel—Right-Hand Threaded
M14	2	Coarse	14	14.5 mm	14.5mm	DIN 8140, SAE MA3279-116	5	000000000	000000	000000000	000000	000000000	0000000	000000000	0000000
M14	2	Coarse	21	14.5 mm	14.5mm	DIN 8140, SAE MA3279-166	1	000000000	0000	000000000	00000	000000000	000000	000000000	000000
M14	1.5	Fine	21	37/64"	37/64"	SAE MA3279-165	5	000000000	00000	000000000	00000	000000000	00000	000000000	000000

Stainless Steel Screw-Locking Helical Inserts

A distorted thread grips the screw to resist loosening. Also known as Heli-Coil inserts, these inserts have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.

Inserts that meet DIN 8140 adhere to international standards for dimensions.

For technical drawings and 3-D models, click on a part number.

Metric

Inserts										Through-Hole Taps		Closed-End Hole Taps		Installation Tools
Thread Size	Thread Pitch, mm	Thread Spacing	Installed Lg., mm	Drill Bit Size	For Max. Hole Dia.	Specifications Met	Pkg. Qty.		Pkg.		Each		Each		Each
18-8 Stainless Steel
M14	2	Coarse	14	14.5 mm	14.5mm	SAE MA3329-116	1	000000000	00000	000000000	000000	000000000	0000000	000000000	0000000
M14	2	Coarse	21	14.5 mm	14.5mm	DIN 8140, SAE MA3329-166	1	000000000	0000	000000000	00000	000000000	000000	000000000	000000
M14	1.5	Fine	21	37/64"	37/64"	DIN 8140, SAE MA3329-165	1	000000000	0000	000000000	00000	000000000	00000	000000000	000000

Helical Inserts with Installation Tools

Shown with Five Inserts and Drill Bit

Inserts come with a through-hole tap and installation tool. Also known as Heli-Coil inserts, they have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw.

Metric

18-8 Stainless Steel—Right-Hand Threaded
Thread Size	Thread Pitch, mm	Thread Spacing	Installed Lg., mm	Drill Bit Size	For Max. Hole Dia.	No. of Inserts Included	Includes		Each
M14	1.5	Fine	21	9/16"	9/16"	5	Drill Bit, Through-Hole Tap, Installation Tool	000000000	0000000
M14	2	Coarse	21	37/64"	37/64"	12	Drill Bit, Through-Hole Tap, Installation Tool	000000000	000000

Spark Plug Thread Repair Kits

Kits include helical inserts, a tap, and an installation tool. Also known as Heli-Coil inserts, they have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw.

18-8 Stainless Steel
Includes	No. of Inserts Included		Each
M14×1.25 mm Thread × 3/8" Insert Reach (6 Each) M14×1.25 mm Thread × 7/16" Insert Reach (6 Each) M14×1.25 mm Thread × 0.472" Insert Reach (6 Each) M14×1.25 mm Thread × 1/2" Insert Reach (6 Each) M14×1.25 mm Thread × 3/4" Insert Reach (6 Each) Through-Hole Tap Installation Tool	30	000000000	0000000

Spark Plug Thread Repair Kits for Gasket-Seat and Taper-Seat Ports

These kits have short-, normal-, and long-reach inserts, an installation tool, and a tap.

18-8 Stainless Steel
Includes	No. of Inserts Included		Each
M14×1.25 mm Thread × Short Insert Reach (1 Each) M14×1.25 mm Thread × Normal Insert Reach (1 Each) M14×1.25 mm Thread × Long Insert Reach (1 Each) Through-Hole Tap Installation Tool	3	000000000	000000
M14×1.25 mm Thread × Short Insert Reach (6 Each) M14×1.25 mm Thread × Normal Insert Reach (6 Each) M14×1.25 mm Thread × Long Insert Reach (6 Each) Through-Hole Tap Installation Tool	18	000000000	00000

Black-Phosphate Steel Easy-to-Install Thread-Locking Inserts

A black-phosphate finish provides mild corrosion resistance. Also known as E-Z Lok, these inserts use Loctite® adhesive to keep them in place. The adhesive reaches full strength after 72 hours. Installation requires a drill bit and a standard tap. Then set the insert with a bolt and two nuts, or use an installation bit.

Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.

To drive slotted inserts, you can use a slotted screwdriver instead of using an installation bit or a bolt and two nuts.

For technical drawings and 3-D models, click on a part number.

Metric

Installation Bit

Inserts
			For Tap									Installation Bits
Thread Size	Thread Pitch, mm	Thread Spacing	Thread Size	Thread Pitch, mm	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	Drive Style	Pkg. Qty.		Pkg.		Each
Black-Phosphate Steel with Thick Wall
M14	2	Coarse	7/8"-9	__	11/16"	49/64"	49/64"	Slotted	5	000000000	000000	000000000	000000
M14	1.25	Extra Fine	3/4"-16	__	21/64"	11/16"	11/16"	__	5	000000000	0000	000000	00
M14	1.25	Extra Fine	3/4"-16	__	29/64"	11/16"	11/16"	__	5	000000000	0000	000000	00
M14	1.25	Extra Fine	3/4"-16	__	45/64"	11/16"	11/16"	__	1	000000000	0000	000000	00
M14	1.25	Extra Fine	M18	1.5	11.5mm	16.5 mm	16.5mm	__	1	000000000	0000	000000	00

18-8 Stainless Steel Easy-to-Install Thread-Locking Inserts

Made of 18-8 stainless steel, these inserts have good corrosion resistance. Also known as E-Z Lok, they use Loctite® adhesive to keep them in place. The adhesive reaches full strength after 72 hours. They may be mildly magnetic. Installation requires a drill bit and a standard tap. Then set the insert with an installation bit, a slotted screwdriver, or a bolt with two nuts.

Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.

For technical drawings and 3-D models, click on a part number.

Metric

Installation Bit

Inserts
			For Tap								Installation Bits
Thread Size	Thread Pitch, mm	Thread Spacing	Thread Size	Installed Lg.	Drill Bit Size	For Max. Hole Dia.	Drive Style	Pkg. Qty.		Pkg.		Each
18-8 Stainless Steel with Thick Wall
M14	2	Coarse	7/8"-9	11/16"	49/64"	49/64"	Slotted	1	000000000	00000	000000000	000000

Bearing Retaining Locknuts

Zinc-Plated Steel

With a nylon insert that grips your threaded shaft or spindle without damaging its threads, these locknuts—also called shaft nuts—hold bearings, bushings, gears, and pulleys prone to vibration tightly in place. They come as one piece, so you can easily clamp them onto your shaft or spindle. But, since they aren’t made entirely of metal, they don’t stand up to heat as well as all-metal locknuts. Slots in their sides mean you can tighten and loosen them with a spanner wrench or spanner socket. Their face is also chamfered to help keep the size and weight of your assembly at a minimum. All meet international standards for bearing locknut dimensions.

When choosing your thread spacing, consider the precision of your application. The finer the threads, the more control you have when making adjustments.

All carbon steel locknuts are strong and resist wear, though they don’t stand up to corrosion as well as stainless steel locknuts. Zinc-plated steel locknuts resist rusting from some moisture, but you shouldn’t use them with salt water or chemicals.

For technical drawings and 3-D models, click on a part number.

Metric

Thread						Zinc-Plated Carbon Steel
Size	Pitch, mm	Spacing	OD	Wd., mm	Insert Max. Temp., °F		Each
Chamfered Face
M14	1	Extra Fine	24mm	8.5	210°	0000000	000000
M14	1.5	Fine	24mm	10.5	210°	0000000	00000

Bearing Retaining Nuts

Stepped

Often paired with spring lock washers to strengthen their hold, these retaining nuts—also known as shaft nuts—keep vibration from shifting bearings, bushings, pulleys, and gears on your threaded shaft or spindle. They have slotted sides, so you can tighten and loosen them with a spanner wrench or spanner socket. Made of carbon steel, they’re strong and wear resistant.

Use stepped-face retaining nuts with DIN 462 spring lock washers. You can also use them in pairs or with other bearing retaining nuts as jam nuts. For the nut closer to the bearing, position the stepped face towards the bearing. All meet DIN standards for bearing lockout dimensions.

For technical drawings and 3-D models, click on a part number.

Nuts
Thread									Optional Washers
Size	Pitch, mm	Spacing	OD, mm	Wd., mm	Specifications Met	For Lock Washer Specifications Met		Each		Each
Carbon Steel
Stepped Face
M14	1.5	Fine	30	7	DIN 1804	DIN 462	0000000	00000	000000000	00000

Bearing Retaining Jam Nuts

Used in pairs or with another bearing retaining nut, these jam nuts—often called shaft nuts—hold bearings, bushings, pulleys, and gears in place on your threaded shaft or spindle. Threading two nuts tightly against each other makes it harder for vibration to loosen your assembly than if you used only one nut. For the nut closer to the bearing, position the stepped face towards the bearing. These jam nuts have holes on the side, so you can tighten and loosen them with a pin spanner wrench. Made of carbon steel, they’re strong and wear resistant. All meet DIN 1816, an international standard for bearing locknut dimensions.

For technical drawings and 3-D models, click on a part number.

Thread
Size	Pitch, mm	Spacing	OD, mm	Wd., mm	Specifications Met		Each
Carbon Steel
Stepped Face
M14	1.5	Fine	30	7	DIN 1816	0000000	000000

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 ball screws and nuts, these have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts. To ensure compatibility, select components that have the same thread size and travel distance per turn. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.

Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.

For technical drawings and 3-D models, click on a part number.

Platform Ball Nuts—Right-Hand Threaded

Alloy Steel
Thread Size	Lg., mm	Wd., mm	Ht., mm	Center Ht., mm	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash, mm	Temperature Range, °F		Each
M14	35	34	30	13	1	4	Rockwell C58	1,200	0.1	5° to 175°	0000000	0000000

Flange Ball Nuts—Right-Hand Threaded

Alloy Steel
Thread Size	Lg., mm	Dia., mm	Wd., mm, mm	Ht., mm	Thick., mm	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash, mm	Temperature Range, °F		Each
M14	40	31	50	37	10	1	4	Rockwell C58	1,200	0.1	5° to 175°	0000000	0000000

Email Us

About Shaft Collars

Selecting Compatible Lead Screws and Nuts

About Washers

About Nuts, Materials, and Finishes

How to Install Key-Locking Inserts

How to Install Helical Inserts

About Helical Insert Length

Stainless Steel Socket Nuts

Alloy Steel Socket Nuts

Black-Phosphate Steel Key-Locking Inserts

18-8 Stainless Steel Key-Locking Inserts

Key-Locking Inserts with Installation Tool

Stainless Steel Helical Inserts

Stainless Steel Screw-Locking Helical Inserts

Helical Inserts with Installation Tools

Spark Plug Thread Repair Kits

Spark Plug Thread Repair Kits for Gasket-Seat and Taper-Seat Ports

Black-Phosphate Steel Easy-to-Install Thread-Locking Inserts

18-8 Stainless Steel Easy-to-Install Thread-Locking Inserts

Bearing Retaining Locknuts

Bearing Retaining Nuts

Bearing Retaining Jam Nuts

Metric Ball Screws and Nuts