Locking Clamping Pins

Captive & Clamping Pins

Product Information

Locking Clamping Pins are similar to standard Clamping Pins, except that the pin body is positively retained in a locking bushing. In fully retracted position, the bushing's spring clip snaps into the pin's radial groove. This holds the pin fully retracted by spring force and positively prevents removal. Spring pressure also holds the pin in intermediate extended positions, an advantage especially if the fixture is turned upside down.

These threaded alignment pins can be used for locating and clamping, or for clamping only, depending on extended screw length. The upper bushing is furnished separate from the pin, and must be welded in place at the proper length to suit the application. Available in thread sizes from 1/4-20 to 1/2-13 (M6 to M12 in metric). Made in USA.

The complete assemblies listed below include a Locking Clamping Pin, Locking-Pin Bushing, and Lockscrew. Choice of standard or long bushing in most sizes, for installation in thinner or thicker plates. Locking-Pin Bushings are designed to press fit in a standard reamed hole, and can be further secured with the included Lockscrew to positively hold the bushing in place.

Application Information

In fully retracted position, the bushing's spring clip holds the Clamping Pin fully retracted by spring force and positively prevents removal. Spring pressure also holds the pin in intermediate extended positions.

Material

ITEM	MATERIAL	HEAT TREAT	FINISH
Pin	1215 Steel	Carburized-hardened	Black Oxide
Handle and Weld-On Bushing	1215 Steel	-	Black Oxide
Locking Bushing	1144 Steel	Carburized-hardened	Black Oxide
Retainer Clip	Spring Steel	-	N/A

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Locking Clamping Pins

Complete Assembly (Inch)

PART NO.	A DIA NOMINAL	A DIA ACTUAL +0/-.004	B PIN LENGTH	P BUSHING LENGTH UNDER HEAD	P	C THREAD	D	E DIA	F DIA	G	H	L	M	N DIA NOMINAL	N DIA ACTUAL +0/-.0003	R +.03/-.01	S	CLAMPING PIN (INCLUDED)	BUSHING (INCLUDED)	LOCKSCREW (INCLUDED)
CL-1-LCP-B	1/4	.2490	4	Standard	.31	1/4-20	1/4	1/2	3/8	2-1/2	.44	3	.10	13/32	.4078	.62	13/16	CL-1-LCP	CL-4-LPB	LS-1
CL-1-LCP-B-2	1/4	.2490	4	Long	.50	1/4-20	1/4	1/2	3/8	2-1/2	.44	3	.10	13/32	.4078	.62	13/16	CL-1-LCP	CL-4A-LPB	LS-1
CL-2-LCP-B-1	5/16	.3115	4	Standard	.31	5/16-18	5/16	9/16	7/16	3	.50	3	.16	1/2	.5017	.62	13/16	CL-2-LCP	CL-5-LPB	LS-1
CL-2-LCP-B	5/16	.3115	4	Medium	.37	5/16-18	5/16	9/16	7/16	3	.50	3	.16	1/2	.5017	.62	13/16	CL-2-LCP	CL-5A-LPB	LS-1
CL-2-LCP-B-3	5/16	.3115	4	Long	.50	5/16-18	5/16	9/16	7/16	3	.50	3	.16	1/2	.5017	.62	13/16	CL-2-LCP	CL-5B-LPB	LS-1
CL-3-LCP-B-1	3/8	.3740	4-1/2	Standard	.31	3/8-16	3/8	5/8	1/2	3-1/2	.57	3-1/2	.23	5/8	.6267	.62	13/16	CL-3-LCP	CL-6-LPB	LS-1
CL-3-LCP-B	3/8	.3740	4-1/2	Long	.50	3/8-16	3/8	5/8	1/2	3-1/2	.57	3-1/2	.23	5/8	.6267	.62	13/16	CL-3-LCP	CL-6A-LPB	LS-1
CL-4-LCP-B-1	1/2	.4990	5	Standard	.50	1/2-13	1/2	3/4	5/8	3-1/2	.69	4	.35	3/4	.7518	.75	1-1/16	CL-4-LCP	CL-8-LPB	LS-1
CL-4-LCP-B	1/2	.4990	5	Long	.75	1/2-13	1/2	3/4	5/8	3-1/2	.69	4	.35	3/4	.7518	.75	1-1/16	CL-4-LCP	CL-8A-LPB	LS-1

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Clamping Pin Only (Inch)

PART NO.	A DIA NOMINAL	A DIA ACTUAL +0/-.004	B PIN LENGTH	C THREAD	D	E DIA	F DIA	G
CL-1-LCP	1/4	.2490	4	1/4-20	1/4	1/2	3/8	2-1/2
CL-2-LCP	5/16	.3115	4	5/16-18	5/16	9/16	7/16	3
CL-3-LCP	3/8	.3740	4-1/2	3/8-16	3/8	5/8	1/2	3-1/2
CL-4-LCP	1/2	.4990	5	1/2-13	1/2	3/4	5/8	3-1/2

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Complete Assembly (Metric)

PART NO.	A DIA NOMINAL (mm)	A DIA ACTUAL +0/-.102 (mm)	B PIN LENGTH (mm)	P BUSHING LENGTH UNDER HEAD	P (mm)	C THREAD	THREAD PITCH (mm)	D (mm)	E DIA (mm)	F DIA (mm)	G (mm)	H (mm)	L (mm)	M (mm)	N DIA NOMINAL (mm)	N DIA ACTUAL +0/-.008 (mm)	R +.8/-.3 (mm)	S (mm)	CLAMPING PIN (INCLUDED)	BUSHING (INCLUDED)	LOCKSCREW (INCLUDED)
CLM-6-LCP-B	6	5.974	102	Standard	8	M6	1	6	12.5	9.5	63.5	11	76	2.3	10	10.038	16	22	CLM-6-LCP	CLM-6-LPB	LSM-3
CLM-8-LCP-B	8	7.976	102	Standard	10	M8	1.25	8	14.5	11	76	14	76	4.1	13	13.043	16	22	CLM-8-LCP	CLM-8-LPB	LSM-3
CLM-10-LCP-B	10	9.975	114	Standard	12	M10	1.5	10	16	12.5	89	17	89	6.1	16	16.043	16	22	CLM-10-LCP	CLM-10-LPB	LSM-3
CLM-12-LCP-B	12	11.976	127	Standard	18	M12	1.75	12	19	16	89	20	102	8.1	20	20.046	18	26	CLM-12-LCP	CLM-12-LPB	LSM-3