Spline Keys | McMaster-Carr

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57 Products

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Keep a selection of sizes on hand

3 products

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Add or replace a single tool

54 products

Relative Length

Short

Fit into tight spaces where you have less room to swing

30 products

Long

The most common option have a balanced length for everyday use

27 products

L-Key Sets

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Plastic

Pouch

Keep the most common L-key sizes in one portable set so the right size is always ready. These L-keys are precision manufactured to tight tolerances for an exact fit.

Alloy Steel—These L-keys handle high torque without bending or breaking, so they’ll last a lifetime.

Short—A short long leg fits into tight spaces where you have less room to swing, making these ideal for confined areas.

Long—The most common option, these L-keys have a balanced length for everyday reach and torque.

	Finish	Container Type		Each
Alloy Steel







	4-Flute Spline and 6-Flute Spline

	9	0.033" 4-Flute Spline L-Key (1 5/16" O'all Lg.) 0.048" 4-Flute Spline L-Key (1 5/16" O'all Lg.) 0.048" 6-Flute Spline L-Key (1 5/16" O'all Lg.) 0.060" 6-Flute Spline L-Key (1 3/4" O'all Lg.) 0.069" 4-Flute Spline L-Key (1 7/8" O'all Lg.) 0.072" 6-Flute Spline L-Key (1 13/16" O'all Lg.) 0.076" 4-Flute Spline L-Key (1 7/8" O'all Lg.) 0.096" 6-Flute Spline L-Key (2" O'all Lg.) 0.111" 6-Flute Spline L-Key (2 1/8" O'all Lg.)	Short	Black Oxide	Plastic Pouch	7048A54	000000


	9	0.060" 6-Flute Spline L-Key (1 3/4" O'all Lg.) 0.069" 4-Flute Spline L-Key (1 7/8" O'all Lg.) 0.072" 6-Flute Spline L-Key (1 7/8" O'all Lg.) 0.076" 4-Flute Spline L-Key (1 7/8" O'all Lg.) 0.096" 6-Flute Spline L-Key (2" O'all Lg.) 0.111" 6-Flute Spline L-Key (2 1/8" O'all Lg.) 0.133" 6-Flute Spline L-Key (2 5/16" O'all Lg.) 0.145" 6-Flute Spline L-Key (2 7/16" O'all Lg.) 0.183" 6-Flute Spline L-Key (2 11/16" O'all Lg.)	Short	Black Oxide	Plastic Pouch	7048A55	00000




			6-Flute Spline

			7	0.096" 6-Flute Spline L-Key (3 1/4" O'all Lg.) 0.111" 6-Flute Spline L-Key (3 1/2" O'all Lg.) 0.133" 6-Flute Spline L-Key (3 3/4" O'all Lg.) 0.145" 6-Flute Spline L-Key (3 15/16" O'all Lg.) 0.168" 6-Flute Spline L-Key (4 1/8" O'all Lg.) 0.183" 6-Flute Spline L-Key (4 5/16" O'all Lg.) 0.216" 6-Flute Spline L-Key (4 11/16" O'all Lg.)	Long	Black Oxide	Plastic Pouch	7048A56	00000

L-Keys

The highest quality L-keys you can buy for tightening and loosening screws. Our L-keys are precision manufactured to tight tolerances for an exact fit.

Alloy Steel—These L-keys handle high torque without bending or breaking, so they’ll last a lifetime.

Short—A short long leg fits into tight spaces where you have less room to swing, making these ideal for confined areas.

Long—The most common option, these L-keys have a balanced length for everyday reach and torque.

		Length					Each		Package
	Drive Size	Overall	Relative	Long Leg	Short Leg	Finish		Each	Pkg. Qty.		Pkg.
Alloy Steel







				4-Flute Spline

				0.033"	1 5/16"	Short	1 1/4"	1/4"	Black Oxide	7048A11	00000	25	7048A111	000000


				0.048"	1 5/16"	Short	1 1/4"	3/8"	Black Oxide	7048A12	0000	25	7048A121	00000
				0.048"	3 3/16"	Long	3 1/8"	3/8"	Black Oxide	7048A61	0000	10	7048A611	00000
				0.069"	1 7/8"	Short	1 3/4"	9/16"	Black Oxide	7048A15	0000	25	7048A151	00000
				0.069"	3 3/16"	Long	3 1/8"	9/16"	Black Oxide	7048A62	0000	10	7048A621	00000
				0.076"	1 7/8"	Short	1 3/4"	9/16"	Black Oxide	7048A16	0000	25	7048A161	00000
				0.076"	3 3/16"	Long	3 1/8"	9/16"	Black Oxide	7048A63	0000	10	7048A631	00000




						6-Flute Spline

						0.048"	1 5/16"	Short	1 1/4"	3/8"	Black Oxide	7048A13	0000	25	7048A131	00000


						0.048"	3 3/16"	Long	3 1/8"	3/8"	Black Oxide	7048A64	0000	10	7048A641	00000
						0.060"	1 3/4"	Short	1 11/16"	9/16"	Black Oxide	7048A14	0000	25	7048A141	00000
						0.060"	3 3/16"	Long	3 1/8"	9/16"	Black Oxide	7048A65	0000	10	7048A651	00000
						0.072"	1 7/8"	Short	1 3/4"	9/16"	Black Oxide	7048A17	0000	25	7048A171	00000
						0.072"	3 3/16"	Long	3 1/8"	9/16"	Black Oxide	7048A66	0000	10	7048A661	00000
						0.096"	2"	Short	1 7/8"	5/8"	Black Oxide	7048A18	0000	25	7048A181	00000
						0.096"	3 1/4"	Long	3 1/8"	5/8"	Black Oxide	7048A31	0000	10	7048A311	00000
						0.111"	2 1/8"	Short	2"	11/16"	Black Oxide	7048A19	0000	25	7048A191	00000
						0.111"	3 1/2"	Long	3 3/8"	11/16"	Black Oxide	7048A32	0000	10	7048A321	00000
						0.133"	2 5/16"	Short	2 1/8"	3/4"	Black Oxide	7048A21	0000	25	7048A211	000000


						0.133"	3 3/4"	Long	3 9/16"	3/4"	Black Oxide	7048A33	0000	10	7048A331	00000
						0.145"	2 7/16"	Short	2 1/4"	3/4"	Black Oxide	7048A22	0000	25	7048A221	000000
						0.145"	3 15/16"	Long	3 3/4"	3/4"	Black Oxide	7048A34	0000	10	7048A341	00000
						0.168"	2 9/16"	Short	2 3/8"	7/8"	Black Oxide	7048A23	00000	10	7048A231	00000
						0.168"	4 1/8"	Long	3 15/16"	13/16"	Black Oxide	7048A35	00000	5	7048A351	000000
						0.183"	2 11/16"	Short	2 1/2"	7/8"	Black Oxide	7048A24	00000	10	7048A241	00000
						0.183"	4 5/16"	Long	4 1/8"	7/8"	Black Oxide	7048A36	00000	5	7048A361	000000
						0.216"	2 7/8"	Short	2 3/4"	15/16"	Black Oxide	7048A25	00000	10	7048A251	000000
						0.216"	4 11/16"	Long	4 1/2"	15/16"	Black Oxide	7048A37	00000	5	7048A371	000000