Spline Design Wrenches | McMaster-Carr

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40 Products

Spline Ratcheting Combination Wrenches

Spline Opening

These versatile wrenches turn hex, 12-point, and spline fasteners. With more points of contact than 12-point openings, the spline-shaped box end gets a better grip on nuts and bolts and is less likely to round off corners. Rotate these wrenches without having to remove and reposition them. They're commonly used where you don't have enough space for full turns. To switch between loosening and tightening, flip them over.

Chrome-Plated Steel—The most popular finish, these wrenches won't rust or chip. Although they withstand moisture better than black oxide, they don't hold up to harsh chemicals as well as stainless steel.

Polished—The smooth surface is easy to wipe clean of grime. The mirror-like finish lends a high-end look to any toolkit.

			Box End				Open End
	Drive Size	Overall Lg.	External Spline Drive Size	Head Offset Angle	Head Thick.	Number of Teeth	Opening Angle	Head Thick.	Appearance		Each
Spline Opening







				Chrome-Plated Steel

				1/4"	5 5/32"	No. 8	15°	1/4"	72	15°	11/64"	Polished	0000000	000000


				9/32"	5 11/64"	No. 9	15°	17/64"	72	15°	11/64"	Polished	0000000	00000
				5/16"	5 7/16"	No. 10	15°	17/64"	72	15°	11/64"	Polished	0000000	00000
				11/32"	5 21/32"	No. 11	15°	17/64"	72	15°	3/16"	Polished	0000000	00000
				3/8"	5 59/64"	No. 12	15°	19/64"	72	15°	13/64"	Polished	0000000	00000
				7/16"	6 29/32"	No. 14	15°	19/64"	72	15°	15/64"	Polished	0000000	00000
				1/2"	7 57/64"	No. 16	15°	11/32"	72	15°	1/4"	Polished	0000000	00000
				9/16"	8 3/4"	No. 18	15°	23/64"	72	15°	9/32"	Polished	0000000	00000
				5/8"	9 1/2"	No. 20	15°	25/64"	72	15°	5/16"	Polished	0000000	00000
				11/16"	10 1/4"	No. 22	15°	13/32"	72	15°	21/64"	Polished	0000000	00000
				3/4"	11 1/64"	No. 24	15°	7/16"	72	15°	11/32"	Polished	0000000	00000


				13/16"	11 13/16"	No. 26	15°	33/64"	72	15°	23/64"	Polished	0000000	00000
				7/8"	12 37/64"	No. 28	15°	33/64"	72	15°	3/8"	Polished	0000000	00000
				15/16"	13 5/16"	No. 30	15°	37/64"	72	15°	13/32"	Polished	0000000	00000
				1"	14 1/64"	No. 32	15°	37/64"	72	15°	7/16"	Polished	0000000	00000
				1 1/16"	14 15/16"	No. 34	15°	39/64"	72	15°	15/32"	Polished	0000000	000000
				1 1/8"	15 53/64"	No. 36	15°	43/64"	72	15°	1/2"	Polished	0000000	000000
				1 1/4"	16 7/8"	No. 40	15°	11/16"	72	15°	35/64"	Polished	0000000	000000
				6 mm	5 5/32"	No. 6	15°	1/4"	72	15°	11/64"	Polished	0000000	00000
				7 mm	5 11/64"	No. 7	15°	17/64"	72	15°	11/64"	Polished	0000000	00000
				8 mm	5 7/16"	No. 8	15°	17/64"	72	15°	11/64"	Polished	0000000	00000


				9 mm	5 21/32"	No. 9	15°	9/32"	72	15°	3/16"	Polished	0000000	00000
				10 mm	5 59/64"	No. 10	15°	19/64"	72	15°	13/64"	Polished	0000000	00000
				11 mm	6 29/32"	No. 11	15°	19/64"	72	15°	7/32"	Polished	0000000	00000
				12 mm	7 27/64"	No. 12	15°	21/64"	72	15°	15/64"	Polished	0000000	00000
				13 mm	7 57/64"	No. 13	15°	11/32"	72	15°	1/4"	Polished	0000000	00000
				14 mm	8 3/4"	No. 14	15°	23/64"	72	15°	9/32"	Polished	0000000	00000
				15 mm	9 9/64"	No. 15	15°	3/8"	72	15°	19/64"	Polished	0000000	00000
				16 mm	9 1/2"	No. 16	15°	25/64"	72	15°	19/64"	Polished	0000000	00000
				17 mm	10 9/32"	No. 17	15°	13/32"	72	15°	21/64"	Polished	0000000	00000
				18 mm	10 43/64"	No. 18	15°	27/64"	72	15°	21/64"	Polished	0000000	00000


				19 mm	11 1/64"	No. 19	15°	7/16"	72	15°	11/32"	Polished	0000000	00000
				21 mm	11 13/16"	No. 21	15°	33/64"	72	15°	23/64"	Polished	0000000	00000
				22 mm	12 37/64"	No. 22	15°	33/64"	72	15°	3/8"	Polished	0000000	00000
				24 mm	13 5/16"	No. 24	15°	37/64"	72	15°	13/32"	Polished	0000000	00000
				27 mm	14 15/16"	No. 27	15°	39/64"	72	15°	15/32"	Polished	0000000	000000
				30 mm	15 13/16"	No. 30	15°	43/64"	72	15°	1/2"	Polished	0000000	000000
				32 mm	16 55/64"	No. 32	15°	11/16"	72	15°	35/64"	Polished	0000000	000000

Spline Ratcheting Combination Wrench Sets

Spline Opening

These versatile wrenches turn a range of hex, 12-point, and spline fasteners. With more points of contact than 12-point openings, the spline-shaped box end gets a better grip on nuts and bolts and is less likely to round off corners. Rotate these wrenches without having to remove and reposition them. They're commonly used where you don't have enough space for full turns. To switch between loosening and tightening, flip them over.

Polished—The smooth surface is easy to wipe clean of grime. The mirror-like finish lends a high-end look to any toolkit.

			Box End
	No. of Pieces	Drive Size	External Spline Drive Size	Number of Teeth	Overall Lg.	Open-End Opening Angle	Appearance	Material	Container Type		Each
Spline Opening



		11	1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"	No. 8, No. 9, No. 10, No. 11, No. 12, No. 14, No. 16, No. 18, No. 20, No. 22, No. 24	72	5 1/8" to 11"	15°	Polished	Chrome-Plated Steel	Plastic Roll-Up Pouch	0000000	0000000


		14	6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm	No. 6, No. 7, No. 8, No. 9, No. 10, No. 11, No. 12, No. 13, No. 14, No. 15, No. 16, No. 17, No. 18, No. 19	72	4 15/16" to 11 1/16"	15°	Polished	Chrome-Plated Steel	Plastic Roll-Up Pouch	0000000	000000