Just wanted to say that the quality of all the products LMI has sent me is awesome!

I was shocked at the outstanding quality of the wood sent with my kit. All the wood in my kit is stunning! I can't wait to work on this project.  The quality of the services is top notch and the tools I bought from LMI are top grade.

I am glad LMI sets a high standard in quality all around. I look forward to this project and many more knowing that a place like LMI exists with these standards.

I work in a manufacturing environment so I know the work it takes to keep such a high standard. I know LMI couldn't do it without having good people doing the daily grind. Please let your co-workers and shop staff know that I said thanks for the work they do.

I hope LMI continues this tradition of high quality, it can be hard to find a place that values a high standard.

Great job
and thanks!

Bolt-On Neck Inserts



TNIU2 for ukulele neck
Our threaded brass inserts and Allen-head bolts make neck alignment, attachment and removal a breeze. Many of the leading manufacturers and hand builders attach necks to bodies with this system. The machining of the neck is greatly simplified, especially with the neck flush-mounted to the body without the complication of either a dovetail or mortise and tenon joint. The inserts have an aggressive thread to hold in the end grain of the flush-mounted heel or tenon.
The TNI2 is for use with acoustic guitars, the TNIU is designed for soprano ukuleles and the TNIU2 for anything larger than a soprano ukulele.

Each TNI2 package contains
  • 2 brass inserts - 1/2" long, 1/4" internal thread,
    7/16" O.D., coarse thread
  • 2 bolts (1/4-20, 1 1/4, Allen head)
  • 2 conical Belleville washers - enough for one neck (5/8" O.D., 1/4" I.D.). The Belleville washers compress when the nut is tightened and continue exerting tension, reducing the possibility of the bolt ever loosening.
  • 1 hex nut for driving the inserts.
Each TNIU package contains:
  • 1 brass insert - 3/8" long, #8 internal thread,
    .328" O.D., coarse thread
  • 1 bolt (8-32, 1 1/8, Allen head)
  • 1 flat washer - #8 size, 7/16" O.D.
  • 1 hex nut for driving the inserts.
Each TNIU2 package contains:
  • 2 brass inserts - 3/8" long, #8 internal thread,
    .328" O.D., coarse thread
  • 2 bolts (8-32, 1 1/8, Allen head)
  • 2 flat washers - #8 size, 7/16" O.D.
  • 1 hex nut for driving the inserts.



For those preferring to use the barrel nut method
we offer barrel nuts and connector bolts (CDN).

  • Barrel nuts - 1/4-20 thread, 10mm/.393" diameter, 20mm/.787" length,
    center bored (not offset)
  • Bolts - 1/4-20 thread, 20mm/.787" thread length, 30mm/1.181" bolt length