K-Couplings | McMaster-Carr

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System of Measurement

Shaft Diameter

For Shaft Misalignment Type

Overall Length

Material

Angular Misalignment Capability

Maximum Torque

Finish

For Rotary Motion

Length

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

REACH

Compliant

RoHS

Compliant

Parallel Misalignment Capability

0.094"

0.125"

0.188"

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

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119 Products

About Shaft Couplings

Also called double-loop couplings, these have a flexible center that reduces vibration and compensates for high parallel and angular shaft misalignment. They allow zero backlash (no play) and will run smoothly and quietly. Fasten to your shaft by tightening the set screws, which bite into the shaft to hold it.

Stainless steel couplings offer excellent corrosion resistance.

					Misalignment Capability
For Shaft Dia.	O'all Lg.	OD	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	For Motion Type	Center Material	Temp. Range, °F		Each
Zinc-Plated Steel
3/16" × 3/16"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K31	000000
3/16" × 1/4"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K32	00000
3/16" × 5/16"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K301	00000
1/4" × 1/4"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K33	00000
1/4" × 1/4"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K41	00000
1/4" × 3/8"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K38	00000
1/4" × 3/8"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K48	00000
1/4" × 1/2"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K306	00000
5/16" × 5/16"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K35	00000
5/16" × 5/16"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K42	00000
5/16" × 3/8"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K36	00000
3/8" × 3/8"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K34	00000
3/8" × 3/8"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K43	00000
3/8" × 3/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K51	00000
3/8" × 1/2"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K44	00000
3/8" × 1/2"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K58	00000
3/8" × 5/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K316	00000
1/2" × 1/2"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K45	00000
1/2" × 1/2"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K52	00000
1/2" × 1/2"	2 7/16"	2"	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K61	00000
1/2" × 5/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K53	00000
1/2" × 5/8"	2 7/16"	2"	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K62	00000
5/8" × 5/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K54	00000
5/8" × 5/8"	2 7/16"	2"	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K63	00000
3mm × 3mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T501	00000
4mm × 4mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T502	00000
4mm × 4mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T601	00000
4mm × 5mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T503	00000
4mm × 6mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T504	00000
5mm × 5mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T505	00000
6mm × 6mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T506	00000
6mm × 6mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T602	00000
6mm × 6mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T701	00000
6mm × 6mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T801	00000
6mm × 8mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T507	00000
6mm × 8mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T603	00000
6mm × 8mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T702	00000
8mm × 8mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T508	00000
8mm × 8mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T604	00000
8mm × 8mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T703	00000
8mm × 8mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T802	00000
8mm × 10mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T605	00000
8mm × 10mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T704	00000
8mm × 10mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T803	00000
10mm × 10mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T606	00000
10mm × 10mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T705	00000
10mm × 10mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T804	00000
10mm × 12mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T607	00000
10mm × 12mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T706	00000
11mm × 11mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T608	00000
12mm × 12mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T609	00000
12mm × 12mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T707	00000
12mm × 12mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T806	00000
14mm × 14mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T708	00000
14mm × 14mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T807	00000
14mm × 15mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T709	00000
15mm × 15mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T711	00000
15mm × 15mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T808	00000
16mm × 16mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T712	00000
16mm × 16mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T809	00000
316L Stainless Steel
3/16" × 3/16"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K501	00000
3/16" × 1/4"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K502	00000
1/4" × 1/4"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K505	00000
1/4" × 1/4"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K601	00000
1/4" × 3/8"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K507	00000
1/4" × 3/8"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K603	00000
1/4" × 1/2"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K605	00000
5/16" × 5/16"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K508	00000
5/16" × 5/16"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K606	00000
5/16" × 3/8"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K509	00000
3/8" × 3/8"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K511	00000
3/8" × 3/8"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K611	00000
3/8" × 3/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K701	000000
3/8" × 1/2"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K613	00000
3/8" × 1/2"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K703	000000
3/8" × 5/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K705	000000
1/2" × 1/2"	1 27/32"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K616	00000
1/2" × 1/2"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K711	000000
1/2" × 1/2"	2 7/16"	2"	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K801	000000
1/2" × 5/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K713	000000
1/2" × 5/8"	2 7/16"	2"	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K803	000000
5/8" × 5/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K716	000000
5/8" × 5/8"	2 7/16"	2"	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	6183K806	000000
3mm × 3mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T101	00000
4mm × 4mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T102	00000
4mm × 4mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T201	00000
4mm × 5mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T103	00000
4mm × 6mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T104	00000
5mm × 5mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T105	00000
6mm × 6mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T106	00000
6mm × 6mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T202	00000
6mm × 6mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T301	00000
6mm × 6mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T401	000000
6mm × 8mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T107	00000
6mm × 8mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T203	00000
6mm × 8mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T302	00000
8mm × 8mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T108	00000
8mm × 8mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T204	00000
8mm × 8mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T303	00000
8mm × 8mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T402	000000
8mm × 10mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T205	00000
8mm × 10mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T304	00000
8mm × 10mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T403	000000
10mm × 10mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T206	00000
10mm × 10mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T305	00000
10mm × 10mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T404	000000
10mm × 12mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T207	00000
10mm × 12mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T306	00000
11mm × 11mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T208	00000
12mm × 12mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T209	00000
12mm × 12mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T307	00000
12mm × 12mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T406	000000
14mm × 14mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T308	00000
14mm × 14mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T407	000000
14mm × 15mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T309	00000
15mm × 15mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T311	00000
15mm × 15mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T408	000000
16mm × 16mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T312	00000
16mm × 16mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	5384T409	000000

About Shaft Couplings

High-Misalignment Vibration-Damping Precision Flexible Shaft Couplings