Keysert Thread Inserts
Anti-vibration threaded inserts, easily convertible from metric to imperial sizes.
Keyserts are mechanical locking thread inserts equipped with locking keys that effectively prevent rotation caused by vibration or torsional loads.
They can be installed in a wide range of base materials, including aluminum, cast iron, cold-rolled steel, and plastics. Keyserts provide high strength and reliability, while offering a simple and efficient installation process.
Features & Benefits
- Provides a positive mechanical locking key
- Easy and efficient installation
- Removable when required
- Delivers high strength and long-term reliability
- Installs using standard drills and taps
- No tang removal required
- Suitable for use in most base materials
- Ideal for thread repair and reinforcement applications
Applications
- Automotive
- Military equipment
- Construction machinery
- Heavy equipment
- Building systems & facilities
- Telecommunications equipment
Installation Procedure
1.Remove the existing screw or fastener.
2.Tap a new thread using a standard tap.
3.Insert the Keysert slightly below the surface.
4.Install the locking pin using the dedicated tool.
Complete Product Range
Professional thread repair solutions for every application
Lightweight Keensert Thread Inserts
Lightweight thread inserts for thin wall applications. Perfect for metric thread repair in aluminum and soft materials.
Heavy Duty Keensert Thread Inserts
Heavy duty thread inserts for thick wall applications. Industrial strength thread repair for demanding environments.
Extra Heavy Duty Keensert Thread Inserts
Extra heavy duty inserts providing maximum strength thread repair. Suitable for imperial thread applications.
Miniature Keensert Thread Inserts
Miniature keensert inserts for small thread applications. Precision thread repair for delicate components.
Imperial Key Locking Thread Inserts Parameters
|
Part Number |
Dimensions |
||||
|
Standard Self Locking |
InternalthreadØ Tol.-3B |
External thread Ø Tol.- 2A mod. |
Shear engagement inch²(mm²) |
L1 inch(mm) |
L4 inch(mm) |
|
KN1032J |
10-32 |
5/16-18 |
0,1517(97,9) |
0,31(7,87) |
|
|
KNL1032J |
0,0945(61,0) |
0,31(7,87) |
|||
|
KN1024J |
10-24 |
5/16-18 |
0,1517(97,9) |
0,31(7,87) |
|
|
KNL1024J |
0,0945(61,0) |
0,31(7,87) |
|||
|
KN428J |
1/4-28 |
3/8-16 |
0,2371(153,0) |
0.37(9,40) |
|
|
KNL428J |
0,1726(111,4) |
0,33(8,38) |
|||
|
KN420J |
1/4-20 |
3/8-16 |
0,2371(153,0) |
0.37(9,40) |
|
|
KNL420J |
0,1726(111,4) |
0,36(9,14) |
|||
|
KN524J |
5/16-24 |
5/16-24 |
0,3049(196,7) |
0,43(10,9) |
|
|
KNL524J |
0,2321(149,7) |
0,34(8,64) |
|||
|
KN518J |
5/16-18 |
5/16-24 |
0,3049(196,7) |
0,43(10,9) |
|
|
KNL518J |
0,2321(149,7) |
0,37(9,40) |
|||
|
Part Number |
Installation Dimensions |
Removal Dimensions |
||||
|
modified Core-Ø* inch (mm) |
C'sink-Ø inch +0,01 (mm)+0,25 |
Installation Thread |
Drill |
|||
|
Thread Tol. - 2B |
L2 min. Inch (mm) |
Ø Inch (mm) |
Depth Inch (mm) |
|||
|
KN1032J |
0,272 (6,91) |
0,323 (8,20) |
5/16-18 |
0,37 (9,4) |
7/32 (5,56) |
5/32 (3.97) |
|
KNL1032J |
||||||
|
KN1024J |
0,272 (6,91) |
0,323 (8,20) |
5/16-18 |
0,37 (9,4) |
7/32 (5,56) |
5/32 (3.97) |
|
KNL1024J |
||||||
|
KN428J |
0.332 (8,43) |
0,385 (9,78) |
3/8-16 |
0,43 (10,9) |
9/32 (7,14) |
3/16 (4,76) |
|
KNL428J |
||||||
|
KN420J |
0.332 (8,43) |
0,385 (9,78) |
3/8-16 |
0,43 (10,9) |
9/32 (7,14) |
3/16 (4,76) |
|
KNL420J |
||||||
|
KN524J |
0,397 (10,08) |
0,447 (11,35) |
7/16-14 |
0.50 (12,7) |
11/32 (8,73) |
3/16 (4,76) |
|
KNL524J |
||||||
|
KN518J |
0,397 (10,08) |
0,447 (11,35) |
7/16-14 |
0.50 (12,7) |
11/32 (8,73) |
3/16 (4,76) |
|
KNL518J |
||||||
|
Part Number |
Dimensions |
||||
|
Standard Self Locking |
InternalthreadØ Tol.-3B |
External thread Ø Tol.- 2A mod. |
Shear engagement inch²(mm²) |
L1 inch(mm) |
L4 inch(mm) |
|
KN624J |
3/8-24 |
1/2-13 |
0,4299 (277,4) |
0,50(12,7) |
|
|
KNL624J |
0,3366 (217,2) |
0,36(9,4) |
|||
|
KN616J |
3/8-16 |
1/2-13 |
0,4299 (277,4) |
0,50(12,7) |
|
|
KNL616J |
0,3366 (217,2) |
0,40(10,16) |
|||
|
KN720J |
7/16-20 |
9/16-12 |
0,5665 (365,5) |
0,56(14,2) |
|
|
KNL720J |
0,4606 (297,2) |
0,41(10,41) |
|||
|
KN714J |
7/16-14 |
9/16-12 |
0,5665 (365,5) |
0,56(14,2) |
|
|
KNL714J |
0,4606 (297,2) |
0,45(11,43) |
|||
|
KN820J |
1/2-20 |
1/2-20 |
0,7175 (462,9) |
0,62(15,8) |
|
|
KNL820J |
0,5906 (381,0) |
0,42(10,67) |
|||
|
KN813J |
1/2-13 |
1/2-13 |
0,7175 (462,9) |
0,62(15,8) |
|
|
KNL813J |
0,5906 (381,0) |
0,47(11,94) |
|||
|
Part Number |
Installation Dimensions |
Removal Dimensions |
||||
|
modified Core-Ø* inch (mm) |
C'sink-Ø inch +0,01 (mm)+0,25 |
Installation Thread |
Drill |
|||
|
Thread Tol. - 2B |
L2 min. Inch (mm) |
Ø Inch (mm) |
Depth Inch (mm) |
|||
|
KN624J |
0,453 (11,51) |
0,510 (12,95) |
1/2-13 |
0,56 (14,2) |
13/32 (10,32) |
3/16 (4,76) |
|
KNL624J |
||||||
|
KN616J |
0,453 (11,51) |
0,510 (12,95) |
1/2-13 |
0,56 (14,2) |
13/32 (10,32) |
3/16 (4,76) |
|
KNL616J |
||||||
|
KN720J |
0,516 (13,11) |
0,572 (14,53) |
9/16-12 |
0,62 (15,7) |
15/32 (11,91) |
3/16 (4,76) |
|
KNL720J |
||||||
|
KN714J |
0,516 (13,11) |
0,572 (14,53) |
9/16-12 |
0,62 (15,7) |
15/32 (11,91) |
3/16 (4,76) |
|
KNL714J |
||||||
|
KN820J |
0,578 (14,68) |
0,635 (16,13) |
5/8-11 |
0,68 (17,3) |
17/32 (13,49) |
3/16 (4,76) |
|
KNL820J |
||||||
|
KN813J |
0,578 (14,68) |
0,635 (16,13) |
5/8-11 |
0,68 (17,3) |
17/32 (13,49) |
3/16 (4,76) |
|
KNL813J |
||||||
Why Choose Key Locking Inserts?
Standard Tools Only
Uses standard drills and taps - no special equipment required for installation.
Positive Mechanical Lock
External keys provide superior holding power by mechanically locking into parent material.
Permanent Solution
Once installed, the insert becomes a permanent part of the assembly with exceptional reliability.
Installation Made Simple
Key locking inserts such as Keenserts have standard ISO Metric, UNC or UNF external threads. This means that Keensert inserts don't need special tooling. They are simply installed using standard drills and taps.
- Standard drilling and tapping tools
- No special installation equipment required
- Compatible with standard ISO, UNC, UNF threads
- Can be fitted by hand using a hammer as the only tool
Why Choose Us?
Your trusted partner for professional thread repair solutions
Superior Strength
Positive mechanical locking provides exceptional holding power and reliability.
Easy Installation
Standard drilling and tapping - no special tools required.
Quality Materials
Premium grade materials for long-lasting performance.
Fast Delivery
Extensive Stock of Standard Parts, Reliable Supply for Daily Needs.
Direct Supply
All our products are made in-house and can meet custom specifications.
Expert Support
Technical assistance and sizing guidance available.
FAQ
Q: What types of plating are used on key locking thread inserts?
A: The standard key locking carbon steel thread inserts "Black in color" are plated with Zinc Phosphate.
Q: What are the torque and pull out specifications for the Key locking thread inserts?
A: Key locking thread inserts make no claims on torque specs or pullout, nor do we provide them. The reason for this is there are many factors that can determine the end result of the insert thread strength.
One major consideration is the installation process:
Was the insert installed correctly using Key locking thread insert tools and square to the hole? This has a huge effect on the outcome of the torque specification.
The type of material the insert is being inserted into. Plastics will not have the same torque values as aluminums, steels, or cast irons.
The length of the insert. Inserts must match the length of the bolt threading into the hole. Too short an insert length could result in thread failure.
Key locking thread inserts state that if the thread repair is done correctly and with the proper length of insert used for the application e.g. the insert is the same length as the original thread engagement, the result should be a hole that matches the original torque specification of the hole. Customers have found in their own testing data that Key locking thread inserts have exceeded their expectations.
Q: Can Loctite® adhesives be used on the external thread of key locking thread inserts?
A: Yes, Loctite may be used on the external threads of the insert. Due to the solid wall design there is no danger of it passing through the threads of the insert and locking up the bolt as in coil types.
Q: What kit size should I buy? Is the kit the internal or external size?
A: The tool kits listed are the "Internal size".
Metric Example: If your bolt is M6x1.0 and your stripped thread is M6x1.0 you will need a M6x1.0 thread repair kit.
Inch Example: If your bolt is 3/8-16 and your stripped thread is 3/8-16 you will need a 3/8-16 thread repair kit.
Q: What materials are Key locking thread inserts made of?
A: Key locking thread inserts are made from C1215 carbon steel and AISI 303 stainless steel. Of course, if you have special material requirements, we can also offer different surface treatments and manufacture in titanium alloy.
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