Produkter og verktøy
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Lock-N-Stitch® Stitching Pins, tooling and Kits.
LNS Inc. manufacture over 30 different stitching pins. They come in two distinct types, the L-series and the C-series, and several diameters and thread lengths. This section show all the different stitching pins and their respective tooling and Kits. To learn about each pin's capabilities, please review our L-series and C-series pages where you will find information about each of the different diameters and thread styles. 

Lock-N-Stitch® Locks.
LNS Inc. manufacture 8 different lock sizes.  No matter what your application, from a small automotive block to a large extrusion press, we have a lock to suit your needs.  When you need to recreate structural strength and integrity, our locks will get the job done. To learn about each lock's capabilities, please review our lock page where you will find specific information about the lock design. 

Full-Torque® Products.
All the Full-Torque® thread inserts are produced by LNS Inc. They are all based on the C-series Spiralhook™ thread geometry for the outside diameter and restore both the needed strength and new threads at the same time. Many sizes and styles are available, including aluminum spark plug inserts and matching inserts for the Ford Triton engines. You can read more about this in the Full-Torque® for sparkplugs section. This is not a flimsy coil insert or another form of a common key locking insert with standard and incomplete external thread profile.
Only Full-Torque® thread replacement inserts will add strength instead of removing strength of the surrounding metal. This is a product that will exceed your expectations.

Lock-N-Stitch® Kits.
There are many kits available to you. To determine the best kit for your needs, read through all the information on our site, think about the type of parts you repair (or want to repair) and consider the financial investment you want to make. You can get started with a mini-stitching pin kit or you can buy the Engine Rebuilder Kit or Industrial Kit and have everything you need for a lagre variety of jobs. And, of course, there's everything in between. Take your time and review the content in each Kits. Contact us and let us know your needs and we will help you pick what will work best for you. We know there's a lot of products and sizes to choose from and we're happy to help.

Lock-N-Stitch® tooling and asseccories.
Among the Lock-N-Stitch® tooling and accessories are an array of pneumatic tools to speed up your repairs, right angle close quarters tooling that gives you flexibility, and a set of independent magnets for easy crack inspection.  We also have a tapping fluid, L750 that works for both cast iron and aluminum, heat-conductive sealants, LHC724 and LHC623, various organizers tools to make your work easier. Please check out all this section to see how you can perform faster, more efficient repairs.

 
L4 Pins, tools & Kits
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The L4 stitching pins are made of both steel and aluminum. Both the L4 and C1 stitching pins use a tap drill size of wire 29. L4 and C1 also share a lot of other tooling. The L4 pins are used in thin walls, tight spots, hardened cast iron and many applications where their small size is helpful. Cracks in aluminum cylinder heads are usually repaired with the L4 aluminum pins. Because of their extra fine standard threads, you can tap threads for L4 pins into the side of hard seat inserts and in between seats.

These pins create a small amount of spreading pressure.
Specifications: 
Thread diameter=0.170"            Shoulder diameter=0.185"
Tap drill=0.136"                        Pins per inch of repair=7

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Pins, tooling and Kits
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Lock-N-Stitch Inc.in Turlock California manufacture over 30 different stitching pins. There are two distinct types of stitching pins: L-series and C-series. They come in several diameters and thread lengths. To learn about each pin's capabilities, please review our stitching pin page where you will find information about the different thread styles.

These special stitching pins are used daily by hundreds of repair technicians around the world to perform engine block crack repairs and cylinder head crack repairs. Cylinder head repair to automotive and large industrial cylinder heads is a very large market for us. Sealing leaks and re-creating strength is very cost effective and reliable.

Read more about the L-series: L4, L6 and L8 Stitching Pins.

Read more about the C-series: C1, C2F, C3 and C4 Stitching Pins.

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L6 Pins, tools & Kits
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The L6 stitching pins are made of both steel and aluminum. Both the L6 and C2F stitching pins use a tap drill size of wire 7. L6 and C2F also share a lot of other tooling. The L6 pins are very popular in many applications where only sealing a crack is required.

Most automotive cylinder heads with cracks in the seat area can be repaired with L6 pins. Simple freeze cracks on engine blocks where the crack length is less than 4" and cracks that are not on inside or outside corners are often repaired with L6 pins. L6 pins generate more spreading pressure than the smaller pins in this series.
Specifications: 
Thread diameter=0.248"            Shoulder diameter=0.268"
Tap drill=0.201"                        Pins per inch of repair=5

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L8 Pins, Tools & Kits
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This page shows you the part numbers for L8 pins and their tooling. To learn about the capabilities of L8 pins, please review the Stitching Pins page.  

The L8 Stitching Pins are made of steel.  The L8 pins use a letter L tap drill.  The L8 pins are the largest in the L Series group.  These pins create significant spreading pressure when tightened.  Applications include large diesel heads, blocks and other industrial castings.  The L8 pins are often used to plug holes or when a larger pin than L6 is needed.
Specifications:  
Thread diameter=0.326"            Shoulder diameter=0.348"
Tap drill=0.290"                        Pins per inch of repair=4

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Stitching Tools and Fluids
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Cutting Tools:  Taps and Drills
Each stitching pin, thread insert and lock has its own cutting tools.
The LOCK-N-STITCH® tap design incorporates shallower flutes for increased strength and for use in power tapping.  Made of CPM-M4 powdered metal technology for abrasion resistance, these taps are available for the L-series pins. 
We also have a patented piloted tap to help keep the tap aligned to the drilled hole. The taps for the C-series pins are extremely durable and they are also shaped for self-alignment.  Check out the taps for both the L-series and C-series.

For more information regarding tapping, see the Tapping Tips section.

We offer two types of drill bits: Tough Duty and AccuSize™  Tough Duty drill bits are made of high quality tool steel and are heat-treated to higher hardness. Patent pending AccuSize™ drill bits prevent oversizing and egg-shaping drilled holes. Having a good, round and accurate-sized hole is essential to making a good repair.

A countersink is optional for L-series stitching pins, but a spotfacer is required for all C-series pins installed into through holes.

Fluids

Cutting and tapping fluid:   We have a newly formulated cutting and tapping fluid you can use for cast iron, steel, and aluminum. This recent version of L750 increases drying time, lengthens the life of your tooling, still dries without a residue, and lets you use just one tapping fluid for all your jobs.
Anaerobic thread sealants:   And here is where you will find the terrific anaerobic thread sealants that transfer heat. The LHC724 and LHC623 sealants are valuable tools to have in your shop. They cure quickly, saving you time between the repair and pressure-testing. And because they conduct heat, they eliminate the complications of uneven heat transfer.

These pages show you the part numbers for our cutting tools and fluids and provide references back to the pages where you will find the matching metal stitching products.

If you have arrived at this page and require more information, here are some pages you can explore that should help explain our process and products:  Metal Stitching, Products.  If you still have questions, you can always contact us and ask for Steinar Danielsen.

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Pins Combo and Kits
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Stitching Pin Combination Starter Kits.
These kits include both L Series and C Series pins.

This page shows you the part numbers for the stitching pin combination kits that might fit the needs of someone just getting started with our products. Be sure to review all the kits and their capabilities. 

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C1 Pins, Tools & Kits
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The C1 stitching pins are made of both steel and aluminum. Both the C1 and L4 stitching pins use a tap drill size of wire 29. C1 and L4 also share a lot of other tooling. This is our smallest CASTMASTER™ stitching pin. This tiny pin is used mostly in thin walls as thin as 0.125" and in tight spots. In 0.125" material, one pin will create 130 pounds of holding power. It can be helpful to leave about 0.040" of shoulder above the surface to add strength to thin material repairs when possible.
Specifications: 
Thread diameter=0.165"            Shoulder diameter=0.215"
Tap drill=0.136"                        Pins per inch of repair=5

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Locks, tooling and Kits
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LNS Inc. manufacture 8 different lock sizes. No matter what your application, from a small automotive block to a large extrusion press, we have a lock to suit your needs. When you need to recreate structural strength and integrity, our locks will get the job done. Read about locking devices on our Locks page. To learn about each lock's capabilities, please review our lock page where you will find specific information about each size.

Our lock design can pull the crack together and create the highest possible amount of strength in the repair. Rather than making a hole pattern by chiseling like the method used in the old metal locking process, we utilize a high precision drill fixture to make the hole pattern completely by drilling, to receive the locks in order to assure the best and strongest possible repair.

Here follows information about the different sizes of Locks, their tooling and Lock Kits.

The sizes are: L10, L15, L15/5, L20, L30, L40, L50 and L60

 
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