Key Inserts – Thinwall, Stainless Steel, Internal Thread Locking (Inch)

Threaded Inserts

Product Information

Key Inserts – Thinwall, Stainless Steel, Internal Thread Locking (Inch) Part # CL-3816-TSKSL Carr Lane Mfg.®

Internal-thread-locking version of our thinwall inserts. 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 with internal thread locking are available in the following inch ID thread sizes:

1/4-20 to 1/2-13 UNC Coarse

#10-32 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

Internal Thread Locking

This option uses a modified internal thread to prevent the installed bolt or stud from rotating. This feature is useful for one-time, permanent installations.

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-1032-TSKSL	I	.323	.37	5/16-18
CL-1420-TSKSL	Q	.385	.43	3/8-16
CL-51618-TSKSL	X	.447	.50	7/16-14
CL-3816-TSKSL	29/64	.510	.56	1/2-13
CL-1213-TSKSL	37/64	.635	.68	5/8-11

REMOVAL DATA
PART NO.	REMOVAL DRILL SIZE	REMOVAL DRILL DEPTH
CL-1032-TSKS	7/32	5/32
CL-1420-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, Internal Thread Locking (Inch)

Key Insert

PART NO.	INTERNAL THREAD	EXTERNAL THREAD	LENGTH	SHEAR ENGAGEMENT AREA (sq in)	MS EQUIVALENT	NAS EQUIVALENT
CL-1032-TSKSL	#10-32	5/16-18	.31	.094	MS 51830-201L	NAS 1394C3L
CL-1420-TSKSL	1/4-20	3/8-16	.37	.173	MS 51830-106L	—
CL-51618-TSKSL	5/16-18	7/16-14	.43	.232	MS 51830-107L	—
CL-3816-TSKSL	3/8-16	1/2-13	.50	.337	MS 51830-108L	—
CL-1213-TSKSL	1/2-13	5/8-11	.68	.591	MS 51830-110L	—