PEEK Nuts | McMaster-Carr

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75 Products

About Hex Nuts

Choose a hex nut with the right profile, material, and strength for your application.

Hex Nuts

The most commonly used hex nuts, these are suitable for fastening most machinery and equipment.

Plastic

High-Strength High-Temperature PEEK—A close alternative to metal nuts, these offer the best strength of all our plastic nuts to stand up to high-stress applications. They also won't degrade when exposed to high heat, so they are a good choice for joining components on circuit boards and other electrical applications. They aren't very impact resistant, however, and may crack or dent if subjected to hard bumps and vibrations.

				Temp., ° F
	Thread Size	Wd.	Ht.	Min.	Max.	Choose a Color	Pkg. Qty.		Pkg.
High-Strength High-Temperature PEEK



		4-40	1/4"	3/32"	-50	550	Black , Brown	1	98886A819	00000


		6-32	5/16"	7/64"	-50	550	Black , Brown	1	98886A822	0000
		8-32	11/32"	1/8"	-50	550	Black , Brown	1	98886A823	0000
		10-32	3/8"	1/8"	-50	550	Black , Brown	1	98886A816	0000
		1/4"-20	7/16"	3/16"	-50	550	Black , Brown	1	98886A813	0000
		1/4"-28	7/16"	3/16"	-50	550	Black	1	98886A731	0000
		5/16"-18	9/16"	7/32"	-50	550	Black , Brown	1	98886A820	0000
		5/16"-24	9/16"	7/32"	-50	550	Black	1	98886A733	0000
		3/8"-16	5/8"	1/4"	-50	550	Black , Brown	1	98886A817	0000
		3/8"-24	5/8"	1/4"	-50	550	Black	1	98886A735	0000
		1/2"-13	45/64"	1/4"	-50	550	Black	1	98886A736	0000


		1/2"-20	45/64"	1/4"	-50	550	Black	1	98886A737	0000
		M3 × 0.5 mm	4.8 mm	1.4 mm	-50	550	Black , Brown	1	98886A826	0000
		M4 × 0.7 mm	6.8 mm	2 mm	-50	550	Black , Brown	1	98886A827	0000
		M5 × 0.8 mm	7.8 mm	2.5 mm	-50	550	Black	1	98886A740	0000
		M6 × 1 mm	9.9 mm	3.2 mm	-50	550	Black	1	98886A741	0000
		M8 × 1.25 mm	12.85 mm	4 mm	-50	550	Black	1	98886A742	0000
		M10 × 1.5 mm	15.85 mm	6.3 mm	-50	550	Black	1	98886A743	0000
		M12 × 1.75 mm	17.9 mm	6.3 mm	-50	550	Black	1	98886A744	0000

Precision Acme Lead Screws and Nuts

Pair with a motor in automated motion and positioning applications. A tight thread fit allows these lead screws and nuts to make accurate, repeatable starts and stops. Also known as single-start and self-locking lead screws and nuts, they have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won’t unexpectedly move when the lead screw is at rest. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.

Round Nuts—Right-Hand Thread

PEEK—PEEK plastic nuts handle twice as much heat as PET and acetal plastic nuts. They have good chemical resistance and excellent corrosion resistance.

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

	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	Temp., ° F		Each
PEEK



	1/2"-10	1"	1.5"	Acme	1:1	1	0.1"	Acme Class 2C	Not Rated	16,000	5,650	-40 to 525	90493A250	0000000

Externally Threaded Nuts—Right-Hand Thread

Image of Product. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Precision Acme Lead Screws and Nuts, Externally Threaded Nuts—Right-Hand Thread.

Combine externally threaded nuts with a flange to create a custom flange nut.

PEEK—PEEK plastic nuts handle twice as much heat as PET and acetal plastic nuts. They have good chemical resistance and excellent corrosion resistance.

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

								External Thread
	Thread Size	Lg.	Dia.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Size	Lg.	Thread Fit	Hardness	Tensile Strength, psi	Dynamic Thrust Load Cap., lb.	Temp., ° F		Each
PEEK



		1/4"-20	5/8"	0.688"	Acme	1:1	1	0.05"	9/16"-18	3/8"	Acme Class 2C	Not Rated	16,000	150	-40 to 525	90493A150	0000000


		1/2"-10	3/4"	1.125"	Acme	1:1	1	0.1"	15/16"-16	1/2"	Acme Class 2C	Not Rated	16,000	620	-40 to 525	90493A160	000000
		3/4"-5	1 1/4"	1.125"	Acme	1:1	1	0.2"	1"-18	1/2"	Acme Class 2C	Not Rated	16,000	1,400	-40 to 525	90493A170	000000
		3/4"-6	1 1/4"	1.125"	Acme	1:1	1	0.166"	1"-18	1/2"	Acme Class 2C	Not Rated	16,000	1,400	-40 to 525	90493A180	000000
		3/4"-10	1 1/4"	1.125"	Acme	1:1	1	0.1"	1"-18	1/2"	Acme Class 2C	Not Rated	16,000	1,400	-40 to 525	90493A190	000000
		1"-4	1 1/2"	1.5"	Acme	1:1	1	0.25"	1 3/8"-16	1/2"	Acme Class 2C	Not Rated	16,000	2,500	-40 to 525	90493A210	000000
		1"-5	1 1/2"	1.5"	Acme	1:1	1	0.2"	1 3/8"-16	1/2"	Acme Class 2C	Not Rated	16,000	2,500	-40 to 525	90493A220	000000
		1"-10	1 1/2"	1.5"	Acme	1:1	1	0.1"	1 3/8"-16	1/2"	Acme Class 2C	Not Rated	16,000	2,500	-40 to 525	90493A230	000000
		1 1/4"-5	1 3/4"	2.125"	Acme	1:1	1	0.2"	1 31/32"-18	13/16"	Acme Class 2C	Not Rated	16,000	3,900	-40 to 525	90493A240	000000

Flanges

Image of Attribute. Front orientation. Contains Annotated.

Thread onto an externally threaded acme nut to create a custom flange nut.

1117 Carbon Steel—Carbon steel flanges have good machinability. However, they will rust when exposed to moisture.

Black-Oxide 1117 Carbon Steel—Black-oxide carbon steel flanges have mild corrosion resistance in dry environments and a dark surface color.

1215 Carbon Steel—Carbon steel flanges have good machinability. However, they will rust when exposed to moisture.

303 Stainless Steel—303 stainless steel flanges have good corrosion resistance.

	Flange Dia.	Flange Thk.	Bolt Circle Dia.	Flange Hardness		Each
1117 Carbon Steel



	1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 156	95082A644	000000


	1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 156	95082A645	00000


	Black-Oxide 1117 Carbon Steel



			9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 135	1329K101	00000


			15/16"-16	2 39/64"	17/32"	2 3/32"	Brinell 135	1329K102	00000
			1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 135	1329K104	00000
			1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 135	1329K105	00000


			1215 Carbon Steel



					9/16"-18	1 39/64"	13/32"	1 1/8"	Not Rated	95082A641	00000


					15/16"-16	2 5/8"	17/32"	2 3/32"	Not Rated	95082A642	00000
					1"-18	2 5/8"	17/32"	2 3/32"	Not Rated	95082A643	00000


					303 Stainless Steel



							9/16"-18	1 39/64"	13/32"	1 1/8"	Brinell 140	1329K11	00000


							15/16"-16	2 5/8"	17/32"	2 3/32"	Brinell 140	1329K12	00000
							1"-18	2 5/8"	17/32"	2 3/32"	Brinell 140	1329K13	00000
							1 3/8"-16	2 49/64"	33/64"	2 17/64"	Brinell 140	1329K14	00000
							1 31/32"-18	4 13/64"	53/64"	3 7/16"	Brinell 140	1329K15	000000

Metric Fast-Travel Ultra-Precision Lead Screws and Nuts


	Style C	Style D

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. To ensure compatibility, select components that have the same thread size and number of thread starts.

Externally Threaded Nuts—Right-Hand Thread

Style C

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

										External Thread
	Style	Thread Size	Lg.	Wd.	Ht.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.		Each
PEEK



		C	M2 × 0.4 mm	5/16"	0.22"	0.197"	Metric Rounded Trapezoidal	2:1	2	0.75	M5 × 0.8 mm	9/64"	Durometer 83D	Not Rated	2	4537N161	000000


		C	M2 × 0.4 mm	5/16"	0.22"	0.197"	Metric Rounded Trapezoidal	4:1	4	1.5	M5 × 0.8 mm	9/64"	Durometer 83D	Not Rated	2	4537N162	00000
		C	M2 × 0.4 mm	5/16"	0.22"	0.197"	Metric Rounded Trapezoidal	8:1	8	3	M5 × 0.8 mm	9/64"	Durometer 83D	Not Rated	2	4537N163	00000
		C	M3 × 0.5 mm	13/32"	0.311"	0.276"	Metric Rounded Trapezoidal	2:1	2	1	M7 × 0.75 mm	5/32"	Durometer 83D	Not Rated	4	4537N164	00000
		C	M3 × 0.5 mm	13/32"	0.311"	0.276"	Metric Rounded Trapezoidal	6:1	6	3	M7 × 0.75 mm	5/32"	Durometer 83D	Not Rated	4	4537N165	00000
		C	M4 × 1 mm	1/2"	0.402"	0.354"	Metric Rounded Trapezoidal	4:1	4	4	M9 × 1 mm	13/64"	Durometer 83D	Not Rated	4	4537N166	00000
		C	M4 × 1 mm	1/2"	0.402"	0.354"	Metric Rounded Trapezoidal	8:1	8	8	M9 × 1 mm	13/64"	Durometer 83D	Not Rated	10	4537N167	00000

Flange Nuts—Right-Hand Thread


Style D	Style D

Wear-Compensating Internal O-Ring—Flange nuts with a wear-compensating internal O-ring resist backlash to keep the nuts in place and maintain a tight fit even when their threads begin to wear. They’re often used in 3D printing and robotic applications.

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

					Flange
	Style	Thread Size	Lg.	Dia.	Wd.	Ht.	Thk.	Thread Type	Speed Ratio	Bolt Circle Dia.	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.	No. of Mounting Holes		Each
PEEK



		D	M2 × 0.4 mm	9/32"	0.209"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	2:1	11/32"	2	0.75	Durometer 83D	Not Rated	2	2	4537N181	000000


		D	M2 × 0.4 mm	9/32"	0.209"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	4:1	11/32"	4	1.5	Durometer 83D	Not Rated	2	2	4537N182	00000
		D	M2 × 0.4 mm	9/32"	0.209"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	8:1	11/32"	8	3	Durometer 83D	Not Rated	2	2	4537N183	00000
		D	M3 × 0.5 mm	21/64"	0.295"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	2:1	15/32"	2	1	Durometer 83D	Not Rated	4	2	4537N184	00000
		D	M3 × 0.5 mm	21/64"	0.295"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	6:1	15/32"	6	3	Durometer 83D	Not Rated	4	2	4537N185	00000
		D	M3 × 0.5 mm	21/64"	0.295"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	12:1	15/32"	12	6	Durometer 83D	Not Rated	4	2	4537N186	00000
		D	M4 × 1 mm	13/32"	0.354"	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	4:1	19/32"	4	4	Durometer 83D	Not Rated	10	2	4537N187	00000
		D	M4 × 1 mm	13/32"	0.354"	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	8:1	19/32"	8	8	Durometer 83D	Not Rated	10	2	4537N188	00000


		PEEK with Wear-Compensating Internal O-Ring



				D	M2 × 0.4 mm	5/16"	0.228"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	2:1	11/32"	2	0.75	Durometer 83D	Not Rated	1	2	4537N201	00000


				D	M2 × 0.4 mm	5/16"	0.228"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	4:1	11/32"	4	1.5	Durometer 83D	Not Rated	1	2	4537N202	00000
				D	M2 × 0.4 mm	5/16"	0.228"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	8:1	11/32"	8	3	Durometer 83D	Not Rated	1	2	4537N203	00000
				D	M3 × 0.5 mm	25/64"	0.315"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	2:1	15/32"	2	1	Durometer 83D	Not Rated	2	2	4537N204	00000
				D	M3 × 0.5 mm	25/64"	0.315"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	6:1	15/32"	6	3	Durometer 83D	Not Rated	2	2	4537N205	00000
				D	M3 × 0.5 mm	25/64"	0.315"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	12:1	15/32"	12	6	Durometer 83D	Not Rated	2	2	4537N206	00000
				D	M4 × 1 mm	31/64"	0.406"	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	4:1	19/32"	4	4	Durometer 83D	Not Rated	4	2	4537N207	00000
				D	M4 × 1 mm	31/64"	0.406"	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	8:1	19/32"	8	8	Durometer 83D	Not Rated	4	2	4537N208	00000

Metric Ultra-Precision Lead Screws and Nuts


	Style B	Style C

Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these provide increased nut life and more reliable movement in automated systems. Also known as single-start and self-locking lead screws and nuts, they have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won't unexpectedly move when the lead screw is at rest. To ensure compatibility, select components that have the same thread size, thread type, thread size, thread pitch, and number of thread starts.

Externally Threaded Nuts—Right-Hand Thread

Style B

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

										External Thread
	Style	Thread Size	Lg.	Wd.	Ht.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn, mm	Size	Lg.	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.		Each
PEEK



		B	M2 × 0.4 mm	5/16"	0.22"	0.197"	Metric Rounded Trapezoidal	1:1	1	0.375	M5 × 0.8 mm	9/64"	Durometer 83D	Not Rated	2	90500A220	000000


		B	M3 × 0.5 mm	13/32"	0.311"	0.276"	Metric Rounded Trapezoidal	1:1	1	0.5	M7 × 0.75 mm	5/32"	Durometer 83D	Not Rated	5	90500A230	00000
		B	M4 × 1 mm	1/2"	0.402"	0.354"	Metric Rounded Trapezoidal	1:1	1	1	M9 × 1 mm	13/64"	Durometer 83D	Not Rated	10	90500A240	00000

Flange Nuts—Right-Hand Thread


Style C	Style C

Wear-Compensating Internal O-Ring—Flange nuts with wear-compensating internal O-ring maintain a tight fit even when their threads begin to wear. They resist backlash to maintain accuracy over time, which is important in positioning applications such as 3D printing and robotics.

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

					Flange
	Style	Thread Size	Lg.	Dia.	Wd.	Ht.	Thk.	Thread Type	Speed Ratio	Bolt Circle Dia.	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.	No. of Mounting Holes		Each
PEEK



		C	M2 × 0.4 mm	9/32"	0.209"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	1:1	11/32"	1	0.375	Durometer 83D	Not Rated	2	2	90500A250	000000


		C	M3 × 0.5 mm	21/64"	0.295"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	1:1	15/32"	1	0.5	Durometer 83D	Not Rated	5	2	90500A260	00000
		C	M4 × 1 mm	13/32"	0.354"	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	1:1	19/32"	1	1	Durometer 83D	Not Rated	10	2	90500A270	00000


		PEEK with Wear-Compensating Internal O-Ring



				C	M2 × 0.4 mm	5/16"	0.228"	15/32"	15/64"	5/64"	Metric Rounded Trapezoidal	1:1	11/32"	1	0.375	Durometer 83D	Not Rated	1	2	90500A280	000000


				C	M3 × 0.5 mm	25/64"	0.315"	39/64"	5/16"	3/32"	Metric Rounded Trapezoidal	1:1	15/32"	1	0.5	Durometer 83D	Not Rated	2	2	90500A290	000000
				C	M4 × 1 mm	31/64"	0.406"	3/4"	13/32"	1/8"	Metric Rounded Trapezoidal	1:1	19/32"	1	1	Durometer 83D	Not Rated	5	2	90500A310	000000