Key Locking Inserts

Stripped threads and spinning inserts kill uptime. Key locking inserts give you a positive mechanical lock and serious pullout strength, even in aluminum, cast iron and plastics. Go thin-wall when space is tight, heavy-duty for bigger than 1/2" sizes and I-Tap when you want self-tapping speed with a wrench or impact. We keep them ready.

61 results

Thin Wall Key Inserts - Fractional

Heavy-Duty Key Inserts

I-Tap™ Thread Inserts - Fractional

Stainless Steel Thin Wall Key Inserts - Fractional

Thin Wall Key Inserts - Metric

I-Tap™ Thread Inserts - Metric

Stainless Steel Thin Wall Key Inserts - Metric

Thin Wall Key Inserts - Fractional

Thin wall key inserts for fractional threads made from carbon steel with black phosphate finish. Engineered for high pullout strength and a positive mechanical lock against rotation, they install with standard drills and taps and help repair worn or thin‑walled holes in light alloys and plastics.

Thread Type: Coarse

Diameter	Length	Thread Size	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
No. 10	0.31"	#10-24	3	85138	Log in to view price
#10-24 Thin Wall Key Insert - 3 Pack Item #: 85138 Package Weight: 0.1 lbs View Product Details Log in to Order
1/4"	0.37"	1/4"-20	3	85140	Log in to view price
1/4"-20 Thin Wall Key Insert - 3 Pack Item #: 85140 Package Weight: 0.1 lbs View Product Details Log in to Order
5/16"	0.43"	5/16"-18	3	85142	Log in to view price
5/16"-18 Thin Wall Key Insert - 3 Pack Item #: 85142 Package Weight: 0.1 lbs View Product Details Log in to Order
3/8"	0.5"	3/8"-16	3	85144	Log in to view price
3/8"-16 Thin Wall Key Insert - 3 Pack Item #: 85144 Package Weight: 0.1 lbs View Product Details Log in to Order
7/16"	0.56"	7/16"-14	2	85146	Log in to view price
7/16"-14 Thin Wall Key Insert - 2 Pack Item #: 85146 Package Weight: 0.1 lbs View Product Details Log in to Order
1/2"	0.62"	1/2"-13	2	85148	Log in to view price
1/2"-13 Thin Wall Key Insert - 2 Pack Item #: 85148 Package Weight: 0.1 lbs View Product Details Log in to Order

Thread Type: Fine

Diameter	Length	Thread Size	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
No. 10	0.31"	#10-32	3	85139	Log in to view price
#10-32 Thin Wall Key Insert - 3 Pack Item #: 85139 Package Weight: 0.1 lbs View Product Details Log in to Order
1/4"	0.37"	1/4"-28	3	85141	Log in to view price
1/4"-28 Thin Wall Key Insert - 3 Pack Item #: 85141 Package Weight: 0.1 lbs View Product Details Log in to Order
5/16"	0.43"	5/16"-24	3	85143	Log in to view price
5/16"-24 Thin Wall Key Insert - 3 Pack Item #: 85143 Package Weight: 0.1 lbs View Product Details Log in to Order
3/8"	0.5"	3/8"-24	3	85145	Log in to view price
3/8"-24 Thin Wall Key Insert - 3 Pack Item #: 85145 Package Weight: 0.1 lbs View Product Details Log in to Order
7/16"	0.56"	7/16"-20	2	85147	Log in to view price
7/16"-20 Thin Wall Key Insert - 2 Pack Item #: 85147 Package Weight: 0.1 lbs View Product Details Log in to Order
1/2"	0.62"	1/2"-20	2	85149	Log in to view price
1/2"-20 Thin Wall Key Insert - 2 Pack Item #: 85149 Package Weight: 0.2 lbs View Product Details Log in to Order

Heavy-Duty Key Inserts

Heavy-duty key inserts made from carbon steel with black phosphate finish offer positive mechanical locking and high pullout strength, resisting rotation and tang break-off. Installed with standard drills and taps for repair or reinforcement of threaded holes in metals and plastics.

Thread Type: Coarse

Diameter	Length	Thread Size	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
No. 10	0.31"	#10-24	3	85101	Log in to view price
#10-24 Heavy Duty Key Insert - 3 Pack Item #: 85101 Package Weight: 0.1 lbs View Product Details Log in to Order
1/4"	0.37"	1/4"-20	3	85103	Log in to view price
1/4"-20 Heavy Duty Key Insert - 3 Pack Item #: 85103 Package Weight: 0.1 lbs View Product Details Log in to Order
5/16"	0.43"	5/16"-18	3	85105	Log in to view price
5/16"-18 Heavy Duty Key Insert - 3 Pack Item #: 85105 Package Weight: 0.1 lbs View Product Details Log in to Order
3/8"	0.5"	3/8"-16	3	85107	Log in to view price
3/8"-16 Heavy Duty Key Insert - 3 Pack Item #: 85107 Package Weight: 0.1 lbs View Product Details Log in to Order
7/16"	0.62"	7/16"-14	2	85109	Log in to view price
7/16"-14 Heavy Duty Key Insert - 2 Pack Item #: 85109 Package Weight: 0.1 lbs View Product Details Log in to Order
1/2"	0.62"	1/2"-13	2	85111	Log in to view price
1/2"-13 Heavy Duty Key Insert - 2 Pack Item #: 85111 Package Weight: 0.1 lbs View Product Details Log in to Order
9/16"	0.81"	9/16"-12	2	85113	Log in to view price
9/16"-12 Heavy Duty Key Insert - 2 Pack Item #: 85113 Package Weight: 0.1 lbs View Product Details Log in to Order
5/8"	0.87"	5/8"-11	2	85115	Log in to view price
5/8"-11 Heavy Duty Key Insert - 2 Pack Item #: 85115 Package Weight: 0.1 lbs View Product Details Log in to Order
3/4"	1.12"	3/4"-10	1	85117	Log in to view price
3/4"-10 Heavy Duty Key Insert Item #: 85117 Package Weight: 0.2 lbs View Product Details Log in to Order
7/8"	1.25"	7/8"-9	1	85119	Log in to view price
7/8"-9 Heavy Duty Key Insert Item #: 85119 Package Weight: 0.2 lbs View Product Details Log in to Order

Thread Type: Fine

Diameter	Length	Thread Size	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
No. 10	0.31"	#10-32	3	85102	Log in to view price
#10-32 Heavy Duty Key Insert - 3 Pack Item #: 85102 Package Weight: 0.1 lbs View Product Details Log in to Order
1/4"	0.37"	1/4"-28	3	85104	Log in to view price
1/4"-28 Heavy Duty Key Insert - 3 Pack Item #: 85104 Package Weight: 0.1 lbs View Product Details Log in to Order

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I-Tap™ Thread Inserts - Fractional

I-Tap™ fractional thread inserts made from chrome vanadium alloy steel with chrome plating. Self-tapping, stackable, and self-locking design installs with common wrenches or sockets and helps repair or add durable internal threads in metals and hard plastics.

Diameter	Length	Thread Size	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
1/4"	12 mm	1/4"-20	10	85704	Log in to view price
1/4"-20 I-Tap™ Thread Insert - 10 Pack Item #: 85704 Package Weight: 0.1 lbs View Product Details Log in to Order
5/16"	14 mm	5/16"-18	5	85705	Log in to view price
5/16"-18 I-Tap™ Thread Insert - 5 Pack Item #: 85705 Package Weight: 0 lbs View Product Details Log in to Order
3/8"	18 mm	3/8"-16	5	85706	Log in to view price
3/8"-16 I-Tap™ Thread Insert - 5 Pack Item #: 85706 Package Weight: 0.1 lbs View Product Details Log in to Order
7/16"	22 mm	7/16"-14	5	85707	Log in to view price
7/16"-14 I-Tap™ Thread Insert - 5 Pack Item #: 85707 Package Weight: 0.2 lbs View Product Details Log in to Order
1/2"	24 mm	1/2"-13	1	85708	Log in to view price
1/2"-13 I-Tap™ Thread Insert Item #: 85708 Package Weight: 0 lbs View Product Details Log in to Order
5/8"	24 mm	5/8"-11	1	85709	Log in to view price
5/8"-11 I-Tap™ Thread Insert Item #: 85709 Package Weight: 0.1 lbs View Product Details Log in to Order

Stainless Steel Thin Wall Key Inserts - Fractional

Stainless steel thin wall key inserts designed to restore damaged or worn threads in castings, forgings, and mechanical components. 302 keys with 303 inserts resist corrosion and provide a positive mechanical lock to prevent rotation and torsion, installs with standard drills and taps.

Thread Type: Coarse

Diameter	Length	Thread Size	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
5/16"	0.43"	5/16"-18	3	85554	Log in to view price
5/16"-18 Stainless Steel (USS) Thin Wall Key Insert - 3 Pack Item #: 85554 Package Weight: 0.1 lbs View Product Details Log in to Order

Thread Type: Fine

Diameter	Length	Thread Size	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
5/16"	0.43"	5/16"-24	3	85555	Log in to view price
5/16"-24 Stainless Steel (SAE) Thin Wall Key Insert - 3 Pack Item #: 85555 Package Weight: 0.1 lbs View Product Details Log in to Order

Thin Wall Key Inserts - Metric

Metric thin wall key inserts made from carbon steel with black phosphate finish. Designed for thin-walled applications, they provide high pullout strength and a positive mechanical lock against rotation, helping repair worn holes and restore threads.

Thread Type: Coarse

Diameter	Length	Thread Size	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
M5	0.315"	M5 x 0.8	3	85191	Log in to view price
M5 x 0.8 Thin Wall Key Insert - 3 Pack Item #: 85191 Package Weight: 0.1 lbs View Product Details Log in to Order
M6	0.394"	M6 x 1.0	3	85192	Log in to view price
M6 x 1.0 Thin Wall Key Insert - 3 Pack Item #: 85192 Package Weight: 0.1 lbs View Product Details Log in to Order
M8	0.472"	M8 x 1.25	3	85195	Log in to view price
M8 x 1.25 Thin Wall Key Insert - 3 Pack Item #: 85195 Package Weight: 0.1 lbs View Product Details Log in to Order
M10	0.551"	M10 x 1.5	2	85197	Log in to view price
M10 x 1.5 Thin Wall Key Insert - 2 Pack Item #: 85197 Package Weight: 0.1 lbs View Product Details Log in to Order
M12	0.63"	M12 x 1.75	2	85199	Log in to view price
M12 x 1.75 Thin Wall Key Insert - 2 Pack Item #: 85199 Package Weight: 0.1 lbs View Product Details Log in to Order

Thread Type: Fine

Diameter	Length	Thread Size	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
M8	0.472"	M8 x 1.0	3	85194	Log in to view price
M8 x 1.0 Thin Wall Key Insert - 3 Pack Item #: 85194 Package Weight: 0.1 lbs View Product Details Log in to Order
M10	0.551"	M10 x 1.25	2	85196	Log in to view price
M10 x 1.25 Thin Wall Key Insert - 2 Pack Item #: 85196 Package Weight: 0.1 lbs View Product Details Log in to Order
M12	0.63"	M12 x 1.25	2	85198	Log in to view price
M12 x 1.25 Thin Wall Key Insert - 2 Pack Item #: 85198 Package Weight: 0.1 lbs View Product Details Log in to Order

I-Tap™ Thread Inserts - Metric

I-Tap™ metric thread inserts made from chrome vanadium alloy steel with a chrome finish. Self-tapping, stackable and self-locking design installs without taps using a nut and bolt, providing quick thread repair or addition in metals and hard plastics and reducing installation time.

Diameter	Length	Thread Size	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
M3	6 mm	M3 x 0.5	10	85710	Log in to view price
M3 x 0.5 I-Tap™ Thread Insert - 10 Pack Item #: 85710 Package Weight: 0 lbs View Product Details Log in to Order
M3.5	8 mm	M3.5 x 0.5	10	85711	Log in to view price
M3.5 x 0.5 I-Tap™ Thread Insert - 10 Pack Item #: 85711 Package Weight: 0 lbs View Product Details Log in to Order
M4	8 mm	M4 x 0.7	10	85712	Log in to view price
M4x 0.7 I-Tap™ Thread Insert - 10 Pack Item #: 85712 Package Weight: 0 lbs View Product Details Log in to Order
M5	10 mm	M5 x 0.8	10	85713	Log in to view price
M5 x 0.8 I-Tap™ Thread Insert - 10 Pack Item #: 85713 Package Weight: 0.1 lbs View Product Details Log in to Order
M6	12 mm	M6 x 1.0	10	85714	Log in to view price
M6 x 1.0 I-Tap™ Thread Insert - 10 Pack Item #: 85714 Package Weight: 0.1 lbs View Product Details Log in to Order
M8	14 mm	M8 x 1.25	5	85715	Log in to view price
M8 x 1.25 I-Tap™ Thread Insert - 5 Pack Item #: 85715 Package Weight: 0.1 lbs View Product Details Log in to Order
M10	18 mm	M10 x 1.5	5	85716	Log in to view price
M10 x 1.5 I-Tap™ Thread Insert - 5 Pack Item #: 85716 Package Weight: 0.1 lbs View Product Details Log in to Order
M12	22 mm	M12 x 1.75	5	85717	Log in to view price
M12 x 1.75 I-Tap™ Thread Insert - 5 Pack Item #: 85717 Package Weight: 0.2 lbs View Product Details Log in to Order
M14	15 mm	M14 x 1.25	5	85718	Log in to view price
M14 x 1.25 I-Tap™ Thread Insert - 5 Pack Item #: 85718 Package Weight: 0.1 lbs View Product Details Log in to Order
M16	24 mm	M16 x 2.0	5	85719	Log in to view price
M16 x 2.0 I-Tap™ Thread Insert - 5 Pack Item #: 85719 Package Weight: 0.2 lbs View Product Details Log in to Order

Stainless Steel Thin Wall Key Inserts - Metric

Stainless steel thin wall key inserts for repairing or reinforcing damaged metric threads. Keys are 302 stainless steel with 303 stainless inserts and lock to prevent rotation. Installable with standard drills and taps, resists corrosion and suits high-vibration applications.

Diameter	Length	Thread Size	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
M5	0.315"	M5 x 0.8	3	85562	Log in to view price
M5 x 0.8 Stainless Steel Thin Wall Key Insert - 3 Pack Item #: 85562 Package Weight: 0.1 lbs View Product Details Log in to Order
M6	0.394"	M6 x 1.0	3	85563	Log in to view price
M6 x 1.0 Stainless Steel Thin Wall Key Insert - 3 Pack Item #: 85563 Package Weight: 0.1 lbs View Product Details Log in to Order
M8	0.472"	M8 x 1.25	3	85564	Log in to view price
M8 x 1.25 Stainless Steel Thin Wall Key Insert - 3 Pack Item #: 85564 Package Weight: 0.1 lbs View Product Details Log in to Order
M12	0.63"	M12 x 1.75	2	85566	Log in to view price
M12 x 1.75 Stainless Steel Thin Wall Key Insert - 2 Pack Item #: 85566 Package Weight: 0.1 lbs View Product Details Log in to Order