Metric Spanner Nuts | McMaster-Carr

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271 Products

Bearing Locknuts

Carbon 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.

Zinc-Plated Carbon Steel—Zinc-plated carbon steel locknuts resist rusting from some moisture, but you shouldn’t use them with salt water or chemicals. They are strong and resist wear, though they don’t stand up to corrosion as well as 303 stainless steel locknuts.

Carbon Steel—All carbon steel locknuts are strong and resist wear, though they don’t stand up to corrosion as well as 303 stainless steel locknuts.

303 Stainless Steel—303 stainless steel locknuts resist corrosion better than carbon steel locknuts but aren’t as strong. They withstand washdowns and chemicals.

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

	Locknuts												Sockets
	Thread						Carbon Steel		Zinc-Plated Carbon Steel		303 Stainless Steel
	Size	Spacing	OD, mm	Wd., mm	Insert Max. Temp., ° F	Specs. Met		Each		Each		Each		Each
Chamfered Face



		M10 × 0.75 mm	Extra Fine	18	7	160	ISO 2982-2	0000000	00000	———	0	0000000	000000	00000000	0000000


		M10 × 0.75 mm	Extra Fine	18	7.5	210	—	———	0	0000000	000000	———	0	———	0
		M10 × 1 mm	Extra Fine	18	7.5	210	—	———	0	0000000	00000	———	0	———	0
		M10 × 1.5 mm	Coarse	18	7.5	210	—	———	0	0000000	00000	———	0	———	0
		M12 × 1 mm	Extra Fine	21	7.5	210	—	———	0	0000000	00000	———	0	———	0
		M12 × 1 mm	Extra Fine	22	8	160	ISO 2982-2	0000000	00000	———	0	0000000	00000	00000000	000000
		M12 × 1.5 mm	Fine	21	9	210	—	———	0	0000000	00000	———	0	———	0
		M14 × 1 mm	Extra Fine	24	8.5	210	—	———	0	0000000	00000	———	0	———	0
		M14 × 1.5 mm	Fine	24	10.5	210	—	———	0	0000000	00000	———	0	———	0
		M15 × 1 mm	Extra Fine	24	8.5	210	—	———	0	0000000	00000	———	0	———	0
		M15 × 1 mm	Extra Fine	25	8.5	160	ISO 2982-2	0000000	00000	———	0	0000000	00000	00000000	000000


		M16 × 1 mm	Extra Fine	28	8.5	210	—	———	0	0000000	00000	———	0	———	0
		M16 × 1.5 mm	Fine	28	10.5	210	—	———	0	0000000	00000	———	0	———	0
		M17 × 1 mm	Extra Fine	28	8.5	210	—	———	0	0000000	00000	———	0	———	0
		M17 × 1 mm	Extra Fine	28	9	160	ISO 2982-2	00000000	00000	———	0	00000000	00000	00000000	000000
		M18 × 1 mm	Extra Fine	28	8.5	210	—	———	0	0000000	00000	———	0	———	0
		M18 × 1.5 mm	Fine	28	10.5	210	—	———	0	0000000	00000	———	0	———	0
		M20 × 1 mm	Extra Fine	32	9.5	210	—	———	0	0000000	00000	———	0	———	0
		M20 × 1 mm	Extra Fine	32	10	160	ISO 2982-2	0000000	00000	———	0	0000000	00000	00000000	000000
		M20 × 1.5 mm	Extra Fine	32	9.5	210	—	———	0	0000000	00000	———	0	———	0
		M22 × 1 mm	Extra Fine	34	10.5	160	ISO 2982-2	0000000	00000	———	0	0000000	00000	———	0


		M22 × 1 mm	Extra Fine	38	10	210	—	———	0	0000000	00000	———	0	———	0
		M22 × 1.5 mm	Fine	38	12.5	210	—	———	0	0000000	00000	———	0	———	0
		M24 × 1.5 mm	Extra Fine	38	10.5	210	—	———	0	0000000	00000	———	0	———	0
		M25 × 1.5 mm	Extra Fine	38	10.5	210	—	———	0	0000000	00000	———	0	———	0
		M25 × 1.5 mm	Extra Fine	38	11	160	ISO 2982-2	0000000	00000	———	0	0000000	00000	00000000	000000
		M27 × 1.5 mm	Extra Fine	44	11	210	—	———	0	0000000	00000	———	0	———	0
		M28 × 1.5 mm	Extra Fine	42	11	160	ISO 2982-2	00000000	00000	———	0	00000000	00000	———	0
		M28 × 1.5 mm	Extra Fine	44	11	210	—	———	0	0000000	00000	———	0	———	0
		M30 × 1.5 mm	Extra Fine	44	11	210	—	———	0	0000000	00000	———	0	———	0
		M30 × 1.5 mm	Extra Fine	45	11.5	160	ISO 2982-2	0000000	00000	———	0	0000000	00000	00000000	000000


		M32 × 1.5 mm	Extra Fine	48	11.5	160	ISO 2982-2	00000000	00000	———	0	00000000	00000	00000000	000000
		M32 × 1.5 mm	Extra Fine	50	11	210	—	———	0	0000000	00000	———	0	———	0
		M34 × 1.5 mm	Extra Fine	50	11	210	—	———	0	0000000	00000	———	0	———	0
		M35 × 1.5 mm	Extra Fine	50	11	210	—	———	0	0000000	00000	———	0	———	0
		M35 × 1.5 mm	Extra Fine	52	12	160	ISO 2982-2	0000000	00000	———	0	0000000	00000	00000000	000000
		M38 × 1.5 mm	Extra Fine	53	11.5	210	—	———	0	0000000	00000	———	0	———	0
		M40 × 1.5 mm	Extra Fine	56	12	210	—	———	0	0000000	00000	———	0	———	0
		M40 × 1.5 mm	Extra Fine	58	12	160	ISO 2982-2	00000000	00000	———	0	00000000	00000	00000000	000000
		M42 × 1.5 mm	Extra Fine	62	15	210	—	———	0	0000000	00000	———	0	———	0
		M45 × 1.5 mm	Extra Fine	62	12	210	—	———	0	0000000	00000	———	0	———	0


		M45 × 1.5 mm	Extra Fine	65	13	160	ISO 2982-2	00000000	00000	———	0	00000000	00000	00000000	000000
		M48 × 1.5 mm	Extra Fine	64	13.5	210	—	———	0	0000000	00000	———	0	———	0
		M50 × 1.5 mm	Extra Fine	68	13	210	—	———	0	0000000	00000	———	0	———	0
		M50 × 1.5 mm	Extra Fine	70	13	160	ISO 2982-2	0000000	00000	———	0	0000000	00000	00000000	000000
		M52 × 1.5 mm	Extra Fine	75	13.5	210	—	———	0	0000000	000000	———	0	———	0
		M55 × 2 mm	Extra Fine	75	13.5	210	—	———	0	0000000	000000	———	0	———	0
		M55 × 2 mm	Extra Fine	75	15	160	ISO 2982-2	00000000	00000	———	0	00000000	00000	00000000	000000
		M60 × 2 mm	Extra Fine	80	13.5	210	—	———	0	0000000	000000	———	0	———	0
		M60 × 2 mm	Extra Fine	80	15	160	ISO 2982-2	00000000	00000	———	0	00000000	00000	00000000	000000
		M65 × 2 mm	Extra Fine	85	14.5	210	—	———	0	0000000	000000	———	0	———	0

M65 × 2 mm	Extra Fine	85	15	160	ISO 2982-2	00000000	00000	———	0	00000000	00000	———	0
M70 × 2 mm	Extra Fine	92	14.5	210	—	———	0	0000000	000000	———	0	———	0
M70 × 2 mm	Extra Fine	92	17	160	ISO 2982-2	00000000	00000	———	0	00000000	000000	———	0
M75 × 2 mm	Extra Fine	98	15.5	210	—	———	0	0000000	000000	———	0	———	0
M75 × 2 mm	Extra Fine	98	17	160	ISO 2982-2	00000000	00000	———	0	———	0	———	0
M80 × 2 mm	Extra Fine	105	16.5	210	—	———	0	0000000	000000	———	0	———	0
M80 × 2 mm	Extra Fine	105	17	160	ISO 2982-2	00000000	00000	———	0	———	0	00000000	00000000
M85 × 2 mm	Extra Fine	110	17.5	210	—	———	0	0000000	000000	———	0	———	0
M85 × 2 mm	Extra Fine	110	18	160	ISO 2982-2	00000000	00000	———	0	———	0	00000000	00000000
M90 × 2 mm	Extra Fine	120	17.5	210	—	———	0	0000000	000000	———	0	———	0
M95 × 2 mm	Extra Fine	125	18.5	210	—	———	0	0000000	000000	———	0	———	0
M95 × 2 mm	Extra Fine	125	20	160	ISO 2982-2	00000000	000000	———	0	———	0	———	0
M100 × 2 mm	Extra Fine	130	19.5	210	—	———	0	0000000	000000	———	0	———	0
M100 × 2 mm	Extra Fine	130	21	160	ISO 2982-2	00000000	000000	———	0	———	0	00000000	00000000
M120 × 2 mm	Extra Fine	155	23	160	ISO 2982-2	00000000	000000	———	0	———	0	———	0

Bearing Nuts

Often paired with spring lock washers to strengthen their hold, these bearing 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.

Carbon Steel—Carbon steel bearing nuts are strong and resist wear.

Chamfered Face—Chamfered-face bearing nuts weigh less and produce less heat than stepped-face nuts.

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

ISO 2982— Some chamfered-face bearing nuts meet ISO 2982 (formerly DIN 981), an international standard for bearing locknut dimensions. Their sizes correspond to SKF KM series. Use them with DIN 5406 spring lock washers.

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

	Nuts								Bearing Lock Washers		Sockets
	Thread
	Size	Spacing	OD, mm	Wd., mm	Specs. Met	For Lock Washer Specs. Met		Each		Each		Each
Carbon Steel







				Chamfered Face

				M10 × 0.75 mm	Extra Fine	18	4	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	00000	00000000	0000000


				M12 × 1 mm	Extra Fine	22	4	DIN 981, ISO 2982	DIN 5406	0000000	0000	000000000	0000	00000000	000000
				M15 × 1 mm	Extra Fine	25	5	DIN 981, ISO 2982	DIN 5406	0000000	0000	000000000	0000	00000000	000000
				M17 × 1 mm	Extra Fine	28	5	DIN 981, ISO 2982	DIN 5406	0000000	0000	000000000	0000	00000000	000000
				M20 × 1 mm	Extra Fine	32	6	DIN 981, ISO 2982	DIN 5406	0000000	0000	000000000	0000	00000000	000000
				M25 × 1.5 mm	Extra Fine	38	7	DIN 981, ISO 2982	DIN 5406	0000000	0000	000000000	0000	00000000	000000
				M30 × 1.5 mm	Extra Fine	45	7	DIN 981, ISO 2982	DIN 5406	0000000	0000	000000000	0000	00000000	000000
				M35 × 1.5 mm	Extra Fine	52	8	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	0000	00000000	000000
				M40 × 1.5 mm	Extra Fine	58	9	DIN 981, ISO 2982	DIN 5406	0000000	0000	000000000	0000	00000000	000000
				M45 × 1.5 mm	Extra Fine	65	10	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	0000	———	0
				M50 × 1.5 mm	Extra Fine	70	11	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	0000	00000000	000000


				M55 × 2 mm	Extra Fine	75	11	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	0000	———	0
				M60 × 2 mm	Extra Fine	80	11	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	0000	00000000	000000
				M65 × 2 mm	Extra Fine	85	12	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	0000	00000000	000000
				M70 × 2 mm	Extra Fine	92	12	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	0000	00000000	00000000
				M75 × 2 mm	Extra Fine	98	13	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	0000	———	0
				M80 × 2 mm	Extra Fine	105	15	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	0000	00000000	00000000
				M85 × 2 mm	Extra Fine	110	16	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	0000	00000000	00000000
				M90 × 2 mm	Extra Fine	120	16	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	00000	———	0
				M95 × 2 mm	Extra Fine	125	17	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	00000	———	0
				M100 × 2 mm	Extra Fine	130	18	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	0000	———	0


				M105 × 2 mm	Extra Fine	140	18	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	0000	———	0
				M110 × 2 mm	Extra Fine	145	19	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	00000	———	0
				M115 × 2 mm	Extra Fine	150	19	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	00000	———	0
				M120 × 2 mm	Extra Fine	155	20	DIN 981, ISO 2982	DIN 5406	0000000	000000	000000000	00000	———	0
				M125 × 2 mm	Extra Fine	160	21	DIN 981, ISO 2982	DIN 5406	0000000	000000	000000000	00000	———	0
				M130 × 2 mm	Extra Fine	165	21	DIN 981, ISO 2982	DIN 5406	0000000	00000	000000000	00000	———	0
				M135 × 2 mm	Extra Fine	175	22	DIN 981, ISO 2982	DIN 5406	0000000	000000	000000000	00000	———	0
				M140 × 2 mm	Extra Fine	180	22	DIN 981, ISO 2982	DIN 5406	0000000	000000	000000000	00000	———	0
				M145 × 2 mm	Extra Fine	190	24	DIN 981, ISO 2982	DIN 5406	0000000	000000	000000000	00000	———	0
				M150 × 2 mm	Extra Fine	195	24	DIN 981, ISO 2982	DIN 5406	0000000	000000	000000000	00000	———	0


				M155 × 3 mm	Extra Fine	200	25	DIN 981, ISO 2982	DIN 5406	0000000	000000	———	0	———	0
				M160 × 3 mm	Extra Fine	210	25	DIN 981, ISO 2982	DIN 5406	0000000	000000	000000000	000000	———	0
				M165 × 3 mm	Extra Fine	210	26	DIN 981, ISO 2982	DIN 5406	0000000	000000	———	0	———	0
				M170 × 3 mm	Extra Fine	220	26	DIN 981, ISO 2982	DIN 5406	0000000	000000	000000000	000000	———	0
				M180 × 3 mm	Extra Fine	230	27	DIN 981, ISO 2982	DIN 5406	0000000	000000	000000000	000000	———	0
				M190 × 3 mm	Extra Fine	240	28	DIN 981, ISO 2982	DIN 5406	0000000	000000	———	0	———	0
				M200 × 3 mm	Extra Fine	250	29	DIN 981, ISO 2982	DIN 5406	0000000	000000	———	0	———	0
				M220 × 4 mm	Extra Fine	280	32	DIN 981, ISO 2982	DIN 5406	0000000	000000	000000000	000000	———	0
				M240 × 4 mm	Extra Fine	300	34	DIN 981, ISO 2982	DIN 5406	0000000	000000	———	0	———	0
				M260 × 4 mm	Extra Fine	330	36	DIN 981, ISO 2982	DIN 5406	0000000	000000	———	0	———	0


				M280 × 4 mm	Extra Fine	350	38	DIN 981, ISO 2982	DIN 5406	0000000	000000	———	0	———	0




	Stepped Face

	M8 × 1 mm				Fine	20	5	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0


	M12 × 1.5 mm	Fine			28	6	DIN 1804	DIN 462	0000000	0000	000000000	0000	———	0
	M14 × 1.5 mm	Fine	30		7	DIN 1804	DIN 462	0000000	0000	000000000	0000	———	0
	M16 × 1.5 mm	Fine	32		7	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0
	M18 × 1.5 mm	Fine	34		8	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0
	M20 × 1.5 mm	Extra Fine	36		8	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0
	M24 × 1.5 mm	Extra Fine	42		9	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0
	M26 × 1.5 mm	Extra Fine	45		10	DIN 1804	DIN 462	0000000	00000	———	0	———	0
	M28 × 1.5 mm	Extra Fine	50		10	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0
	M30 × 1.5 mm	Extra Fine	50		10	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0
	M32 × 1.5 mm	Extra Fine	52		11	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0


	M35 × 1.5 mm	Extra Fine	55		11	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0
	M38 × 1.5 mm	Extra Fine	58		11	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0
	M40 × 1.5 mm	Extra Fine	62		12	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0
	M42 × 1.5 mm	Extra Fine	62		12	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0
	M45 × 1.5 mm	Extra Fine	68		12	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0
	M50 × 1.5 mm	Extra Fine	75		13	DIN 1804	DIN 462	0000000	00000	000000000	0000	———	0
	M55 × 1.5 mm	Extra Fine	80		13	DIN 1804	DIN 462	0000000	00000	———	0	———	0
	M60 × 1.5 mm	Extra Fine	90		13	DIN 1804	DIN 462	0000000	00000	———	0	———	0
	M65 × 1.5 mm	Extra Fine	95		14	DIN 1804	DIN 462	0000000	00000	———	0	———	0

Thin-Profile Bearing Nuts

Used in pairs or with another bearing nut, these thin-profile 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 thin-profile nuts have holes on the side, so you can tighten and loosen them with a pin spanner wrench. All meet DIN 1816, an international standard for bearing locknut dimensions.

Carbon Steel—Carbon steel bearing nuts are strong and resist wear.

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

	Thread
	Size	Spacing	OD, mm	Wd., mm	Specs. Met		Each
Carbon Steel







				Stepped Face

				M8 × 1 mm	Fine	20	5	DIN 1816	0000000	000000


				M12 × 1.5 mm	Fine	28	6	DIN 1816	0000000	00000
				M14 × 1.5 mm	Fine	30	7	DIN 1816	0000000	00000
				M16 × 1.5 mm	Fine	32	7	DIN 1816	0000000	00000
				M18 × 1.5 mm	Fine	34	8	DIN 1816	0000000	00000
				M20 × 1.5 mm	Extra Fine	36	8	DIN 1816	0000000	00000
				M22 × 1.5 mm	Fine	40	9	DIN 1816	0000000	00000
				M24 × 1.5 mm	Extra Fine	42	9	DIN 1816	0000000	00000
				M26 × 1.5 mm	Extra Fine	45	10	DIN 1816	0000000	00000
				M28 × 1.5 mm	Extra Fine	50	10	DIN 1816	0000000	00000
				M30 × 1.5 mm	Extra Fine	50	10	DIN 1816	0000000	00000


				M35 × 1.5 mm	Extra Fine	55	11	DIN 1816	0000000	00000
				M40 × 1.5 mm	Extra Fine	62	12	DIN 1816	0000000	00000
				M42 × 1.5 mm	Extra Fine	62	12	DIN 1816	0000000	00000
				M45 × 1.5 mm	Extra Fine	68	12	DIN 1816	0000000	00000
				M48 × 1.5 mm	Extra Fine	75	13	DIN 1816	0000000	00000
				M50 × 1.5 mm	Extra Fine	75	13	DIN 1816	0000000	00000
				M52 × 1.5 mm	Extra Fine	80	13	DIN 1816	0000000	00000
				M55 × 1.5 mm	Extra Fine	80	13	DIN 1816	0000000	00000
				M60 × 1.5 mm	Extra Fine	90	13	DIN 1816	0000000	00000
				M62 × 1.5 mm	Extra Fine	95	14	DIN 1816	0000000	000000


				M65 × 1.5 mm	Extra Fine	95	14	DIN 1816	0000000	000000
				M68 × 1.5 mm	Extra Fine	100	14	DIN 1816	0000000	000000
				M70 × 1.5 mm	Extra Fine	100	14	DIN 1816	0000000	00000
				M72 × 1.5 mm	Extra Fine	110	14	DIN 1816	0000000	000000
				M75 × 1.5 mm	Extra Fine	110	14	DIN 1816	0000000	00000
				M80 × 2 mm	Extra Fine	115	16	DIN 1816	0000000	00000

Shock Absorber Mounting Nuts

Hex Nuts

Round Nuts

Use Mounting Blocks for Shock Absorbers (not included) to mount and secure threaded-body shock absorbers.

		Steel
	Thread Size		Each
Hex Nuts



		M8 × 0.75 mm	0000000	00000


		M8 × 1 mm	0000000	0000
		M10 × 1 mm	0000000	0000
		M12 × 1 mm	0000000	0000
		M14 × 1 mm	0000000	0000
		M14 × 1.5 mm	0000000	0000
		M20 × 1.5 mm	0000000	0000
		M25 × 1.5 mm	0000000	0000
		M33 × 1.5 mm	0000000	00000
		M36 × 1.5 mm	0000000	00000


		Round Nuts



				M45 × 1.5 mm	0000000	00000

Drilled-Spanner-Drive Tamper-Resistant Nuts

A wide base and large bearing surface make these nuts good for securing large objects. They must be installed and removed with a nutdriver (sold separately). Use them to reduce the risk of unwanted removal for objects in public spaces such as signs, lighting fixtures, and displays.

Zinc—Made from zinc, they're corrosion resistant in wet environments.

	Nuts						Spanner Nutdrivers
	Thread Size	Dia.	Ht.	Pkg. Qty.		Pkg.		Each
Zinc



		M6 × 1 mm	1"	1/4"	10	000000000	000000	000000000	000000


		M8 × 1.25 mm	1"	1/4"	10	000000000	00000	000000000	00000
		M10 × 1.5 mm	1"	1/4"	10	000000000	00000	000000000	00000