Key Inserts – Heavy Duty, Steel (Inch)

Threaded Inserts

Product Information

General-purpose threaded inserts with a thick, heavy-duty thread wall, suitable for most applications. Key Inserts are ideal for thread reinforcement, especially when the mating stud or bolt will be removed frequently. They provide strong, permanent steel threads in almost any parent material – ferrous, non-ferrous, or non-metallic. Key Inserts are also well suited for quick repair of stripped, damaged, or worn threads. Locking keys positively prevent the insert from rotating.

Heavy-duty steel Key Inserts are available in a wide range of inch and metric ID thread sizes. The following inch sizes are shown on this page:

#10-24 to 1-1/2"-6 NC Coarse

#10-32 to 1-1/2"-12 UNF Fine

Key Inserts are installed using standard drills and taps, but the required tap-drill size is slightly larger than normal for that OD thread size. See Installation Data table below for the appropriate tap-drill size.

Application Information

Key Inserts are often used to reinforce tapped holes in aluminum tooling plates.

Repair Kits contain an installation tool and several inserts of a given size.

Installation/Removal

Key Inserts are installed using standard drills and taps, but the required tap-drill size is slightly larger than normal for that OD thread size. See Installation Data table below for the appropriate tap-drill size. Locking keys must be driven down into the parent material during installation, providing a positive mechanical lock against rotation. See tables below for installation tools, or for repair kits containing an installation tool and several Key Inserts of a given size.

Click here for detailed Installation & Removal Instructions

INSTALLATION DATA
PART NO.	REQUIRED TAP DRILL	COUNTERSINK DIA	MINIMUM THREAD DEPTH	STANDARD TAP
CL-1024-KS	Q	3/8	3/8	3/8-16
CL-1032-KS	Q	3/8	3/8	3/8-16
CL-1420-KS	X	7/16	7/16	7/16-14
CL-1428-KS	X	7/16	7/16	7/16-14
CL-51618-KS	29/64	1/2	1/2	1/2-13
CL-51624-KS	29/64	1/2	1/2	1/2-13
CL-3816-KS	33/64	9/16	9/16	9/16-12
CL-3824-KS	33/64	9/16	9/16	9/16-12
CL-71614-KS	37/64	5/8	11/16	5/8-11
CL-71620-KS	37/64	5/8	11/16	5/8-11
CL-1213-KS	45/64	3/4	11/16	3/4-16
CL-1220-KS	45/64	3/4	11/16	3/4-16
CL-91612-KS	45/64	3/4	7/8	3/4-16
CL-91618-KS	45/64	3/4	7/8	3/4-16
CL-5811-KS	53/64	7/8	1	7/8-14
CL-5818-KS	53/64	7/8	1	7/8-14
CL-3410-KS	1-1/16	1-1/8	1-5/16	1-1/8"-12
CL-3416-KS	1-1/16	1-1/8	1-5/16	1-1/8"-12
CL-789-KS	1-3/16	1-1/4	1-7/16	1-1/4"-12
CL-7814-KS	1-3/16	1-1/4	1-7/16	1-1/4"-12
CL-18-KS	1-5/16	1-3/8	1-9/16	1-3/8"-12
CL-112-KS	1-5/16	1-3/8	1-9/16	1-3/8"-12
CL-1187-KS	1-7/16	1-1/2	1-11/16	1-1/2"-12
CL-11812-KS	1-7/16	1-1/2	1-11/16	1-1/2"-12
CL-1147-KS	1-35/64	1-5/8	2	1-5/8"-12
CL-11412-KS	1-35/64	1-5/8	2	1-5/8"-12
CL-1126-KS	1-51/64	1-7/8	2-3/16	1-7/8"-12
CL-11212-KS	1-51/64	1-7/8	2-3/16	1-7/8"-12

REMOVAL DATA
PART NO.	REMOVAL DRILL SIZE	REMOVAL DRILL DEPTH
CL-1024-KS	9/32	1/8
CL-1032-KS	9/32	1/8
CL-1420-KS	11/32	3/16
CL-1428-KS	11/32	3/16
CL-51618-KS	13/32	3/16
CL-51624-KS	13/32	3/16
CL-3816-KS	15/32	3/16
CL-3824-KS	15/32	3/16
CL-71614-KS	17/32	3/16
CL-71620-KS	17/32	3/16
CL-1213-KS	21/32	3/16
CL-1220-KS	21/32	3/16
CL-91612-KS	21/32	3/16
CL-91618-KS	21/32	3/16
CL-5811-KS	25/32	3/16
CL-5818-KS	25/32	3/16
CL-3410-KS	31/32	5/16
CL-3416-KS	31/32	5/16
CL-789-KS	1-3/32	5/16
CL-7814-KS	1-3/32	5/16
CL-18-KS	1-7/32	5/16
CL-112-KS	1-7/32	5/16
CL-1187-KS	1-11/32	5/16
CL-11812-KS	1-11/32	5/16
CL-1147-KS	1-15/32	5/16
CL-11412-KS	1-15/32	5/16
CL-1126-KS	1-23/32	5/16
CL-11212-KS	1-23/32	5/16

Material

ITEM	MATERIAL	HEAT TREAT	FINISH	DFARS	RoHS
Body	1215 Steel	-	Black Oxide or Dry Lube	✔	✔
Keys	302 Stainless Steel	-	-	✔	✔

Click here for detailed material and finish specifications.

California residents click here for Prop 65 information.

Key Inserts – Heavy Duty, Steel (Inch)

Key Insert

PART NO.	INTERNAL THREAD	EXTERNAL THREAD	LENGTH	SHEAR ENGAGEMENT AREA (sq in.)
CL-1024-KS	#10-24	3/8-16	.31	.190
CL-1032-KS	#10-32	3/8-16	.31	.190
CL-1420-KS	1/4-20	7/16-14	.37	.284
CL-1428-KS	1/4-28	7/16-14	.37	.284
CL-51618-KS	5/16-18	1/2-13	.43	.359
CL-51624-KS	5/16-24	1/2-13	.43	.359
CL-3816-KS	3/8-16	9/16-12	.50	.498
CL-3824-KS	3/8-24	9/16-12	.50	.498
CL-71614-KS	7/16-14	5/8-11	.62	.717
CL-71620-KS	7/16-20	5/8-11	.62	.717
CL-1213-KS	1/2-13	3/4-16	.62	1.057
CL-1220-KS	1/2-20	3/4-16	.62	1.057
CL-91612-KS	9/16-12	3/4-16	.81	1.057
CL-91618-KS	9/16-18	3/4-16	.81	1.057
CL-5811-KS	5/8-11	7/8-14	.87	1.487
CL-5818-KS	5/8-18	7/8-14	.87	1.487
CL-3410-KS	3/4-10	1-1/8"-12	1.12	2.490
CL-3416-KS	3/4-16	1-1/8"-12	1.12	2.490
CL-789-KS	7/8-9	1-1/4"-12	1.25	3.137
CL-7814-KS	7/8-14	1-1/4"-12	1.25	3.137
CL-18-KS	1"-8	1-3/8"-12	1.37	3.838
CL-112-KS	1"-12	1-3/8"-12	1.37	3.838
CL-1187-KS	1-1/8"-7	1-1/2"-12	1.62	4.752
CL-1147-KS	1-1/4"-7	1-5/8"-12	1.81	5.446
CL-1126-KS	1-1/2"-6	1-7/8"-12	2.00	7.103
CL-11212-KS	1-1/2"-12	1-7/8"-12	2.00	7.103

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Key-Insert Kit

PART NO.	INCLUDES KEY INSERT	INSERTS PER KIT	INCLUDES TOOL
CL-1024-KSK	CL-1024-KS	15	CL-10-KST
CL-1032-KSK	CL-1032-KS	15	CL-10-KST
CL-1420-KSK	CL-1420-KS	13	CL-14-KST
CL-1428-KSK	CL-1428-KS	13	CL-14-KST
CL-51618-KSK	CL-51618-KS	8	CL-516-KST
CL-51624-KSK	CL-51624-KS	8	CL-516-KST
CL-3816-KSK	CL-3816-KS	6	CL-38-KST
CL-3824-KSK	CL-3824-KS	6	CL-38-KST
CL-71614-KSK	CL-71614-KS	6	CL-38-KST
CL-71620-KSK	CL-71620-KS	6	CL-38-KST
CL-1213-KSK	CL-1213-KS	5	CL-12-KST
CL-1220-KSK	CL-1220-KS	5	CL-12-KST
CL-91612-KSK	CL-91612-KS	3	CL-12-KST
CL-91618-KSK	CL-91618-KS	3	CL-12-KST
CL-5811-KSK	CL-5811-KS	2	CL-58-KST
CL-5818-KSK	CL-5818-KS	2	CL-58-KST
CL-3410-KSK	CL-3410-KS	2	CL-34-KST
CL-3416-KSK	CL-3416-KS	2	CL-34-KST
CL-789-KSK	CL-789-KS	2	CL-34-KST
CL-7814-KSK	CL-7814-KS	2	CL-34-KST
CL-18-KSK	CL-18-KS	2	CL-1-KST
CL-112-KSK	CL-112-KS	2	CL-1-KST
CL-1187-KSK	CL-1187-KS	2	CL-118-KST
CL-11812-KSK	CL-11812-KS	2	CL-118-KST
CL-1147-KSK	CL-1147-KS	2	CL-114-KST
CL-11412-KSK	CL-11412-KS	2	CL-114-KST
CL-1126-KSK	CL-1126-KS	2	CL-112-KST
CL-11212-KSK	CL-11212-KS	2	CL-112-KST