Key Inserts – Thinwall, Stainless Steel (Inch)

Threaded Inserts

Product Information

Key Inserts – Thinwall, Stainless Steel (Inch)

Thinwall Key Inserts have a smaller OD thread size than standard heavy-duty inserts, ideal for tight spaces where less pull-out strength is acceptable. Key Inserts are ideal for thread reinforcement, especially when the mating stud or bolt will be removed frequently. These stainless inserts provide strong, permanent stainless steel threads in 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.

Thinwall stainless 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 1/2-13 UNC Coarse

#10-32 to 1/4-28 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

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.

Click here for detailed Installation & Removal Instructions

INSTALLATION DATA
PART NO.	REQUIRED TAP DRILL	COUNTERSINK DIA	MINIMUM THREAD DEPTH	STANDARD TAP
CL-1024-TSKS	I	.323	.37	5/16-18
CL-1032-TSKS	I	.323	.37	5/16-18
CL-1420-TSKS	Q	.385	.43	3/8-16
CL-1428-TSKS	Q	.385	.43	3/8-16
CL-51618-TSKS	X	.447	.50	7/16-14
CL-3816-TSKS	29/64	.510	.56	1/2-13
CL-1213-TSKS	37/64	.635	.68	5/8-11

REMOVAL DATA
PART NO.	REMOVAL DRILL SIZE	REMOVAL DRILL DEPTH
CL-1024-TSKS	7/32	5/32
CL-1032-TSKS	7/32	5/32
CL-1420-TSKS	9/32	3/16
CL-1428-TSKS	9/32	3/16
CL-51618-TSKS	11/32	3/16
CL-3816-TSKS	13/32	3/16
CL-1213-TSKS	17/32	3/16

Material

ITEM	MATERIAL	HEAT TREAT	FINISH	RoHS
Body	303 Stainless Steel	-	-	✔
Keys	302 Stainless Steel	-	-	✔

Click here for detailed material and finish specifications.

California residents click here for Prop 65 information.

Key Inserts – Thinwall, Stainless Steel (Inch)

Key Insert

PART NO.	INTERNAL THREAD	EXTERNAL THREAD	LENGTH	SHEAR ENGAGEMENT AREA (sq in.)	MS EQUIVALENT	NAS EQUIVALENT
CL-1024-TSKS	#10-24	5/16-18	.31	.152	MS 51830-105
CL-1032-TSKS	#10-32	5/16-18	.31	.152	MS 51830-201	NAS 1394C3
CL-1420-TSKS	1/4-20	3/8-16	.37	.237	MS 51830-106
CL-1428-TSKS	1/4-28	3/8-16	.37	.237	MS 51830-202	NAS 1394C4
CL-51618-TSKS	5/16-18	7/16-14	.43	.305	MS 51830-107
CL-3816-TSKS	3/8-16	1/2-13	.50	.430	MS 51830-108
CL-1213-TSKS	1/2-13	5/8-11	.62	.718	MS 51830-110