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Shaft Slot Pin

Our pins are made in our shop in Leitchfield, Ky. The size information listed below on our size chart is what we have seen fit these guitars in years past. Contact us for custom sizes and unslotted pins. The unslotted pin is a big thing now and we have alot of people asking if we have them. Thanks Bryan England


Never modify your guitar to make bridge pins fit !

Shaft slot pin removal tool

A spring pin is a hollow, split dowel pin that exerts uniform outward pressure when fitted into a nut or shaft hole. Also called a roll pin, the spring pin withstands side loads and rotational friction, making it ideal for securing shaft and axle connections. Spring pins are also easy to insert and remove. Pin Shaft Stainless Steel/steel Hinge Pin Long Slotted Pin Shaft Spindle Motor Pin Spindle Stud. US $0.50-$2.00 / Piece 1000 Pieces. . The hole in a shaft should not exceed 1/3 of the shaft diameter. For mild steel and nonferrous shafts, standard duty pins are recommended. The extra strength of a heavy duty pin is only beneficial if the hole is less than 1/4 the diameter of the shaft or if the shaft is hardened (Figure 1). Insert the Pump Timing Pin (P/N 40610) into the hole (Figure 3a) and rotate the pump’s drive shaft until the pin indexes in the internal drive shaft slot. Leave the pump timing pin in the pump until installation is complete. NOTE: A small punch may be temporarily inserted into the small hole in the drive shaft taper to facilitate shaft.

Always get pins that fit your guitar !

Bridge pins are certainly not ' one size fits all '. With this size chart, our aim is to help you get the correct size pins the first time. These pin sizes cover most guitars out there. Of course, there are custom pins, old pins that are no longer made and pins sizes that were used for brief periods. Please contact us with any questions. As always, if you order a set of pins and they do not fit your guitar, we will replace them with the proper size pins. For more discussion, we break the pins down to three parts: the head, the skirt (flared below the head) and the shaft.


Size 1

3 º tapered shaft with the diameter at the top of the shift (just below the skirt) of 0.210' and a string slot running the full length of the shaft, stopping below the skirt.This size pin will fit Martin guitars prior to 1994 (except HD-28), Collings guitars prior to 2002, as well as Blanchard, Garrison, Goodall, Ryan, Santa Cruz and Taylor guitars.
Fits Larrive D-03R

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3 º tapered shaft with the diameter at the top of the shift (just below the skirt) of 0.210' and a string slot running the full length of the shaft through the skirt.
Fits Gibson after November 2009

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Shaft Slot Pin

Size 1.3

3 º tapered shaft with the diameter at the top of the shift (just below the skirt) of 0.205' and a string slot running the full length of the shaft through the skirt.
Fits Gibson Guitars from later years to 2009, Weissenborn, Huss & Dalton, McPherson,
Washburn, Froggy Bottom, Takamine, Taylor,
Taylor 6C8 2007, Alyare-YARI, Martin D-166T, Guild D-412
NOTE: We have found the size 1.3 fits the newer model Guild guitars.

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5 º tapered shaft with the diameter at the top of the shaft (just below the skirt) of 0.220' and a string slot running the full length of the shaft and cutting through the shirt. This size will fit Martin guitars since 1994 and some Old Gibson guitars.
Also, Fits 2007 Martin D-28

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Shaft slot pin removal tool

Size 2B

The same as size 2A except the string slot actually stops 1/16' below the bottom of the skirt. This size will fit Martin HD-28 guitars prior to 1994 and
Alyare-5236

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If you own a new Martin guitar, chances are the bridge pins are installed so that the head of the pin sticks up about 1/4' above the bridge. Our Size 2A pins will fit the same way. Size 2C is the same degree of taper but with a reduced shift diameter (0.215' at the top of the shaft) so that they will sit farther down in the bridge.
This size will fit 2010 Martin HD28V.

Shaft Slot Pin

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Size 4.1 and 4.2

A larger head profile with no skirt make these pins stand out on Dreadnought and Jumbo guitars. Available in Size 4.1 (3 º tapered shaft) and Size 4.2 (5 º tapered shaft). Larrivee guitars use a Size 4.1 slotted pin.

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This size will fit Maton EB6808TE, IBANEZ

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Size 4.2C

Beginning in 2002, Collings switched to an unslotted pin with a 5 º taper and a longer shaft length. The shaft diameter is 0.223' (just below the head). Also used on Bourgeois guitars.

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The diameter at the top of the shaft is 0.207' and tapers down to 0.144' with a long (0.945') shaft. The slot runs the full length of the shaft, stopping below the ball. These pins do not have a skirt - just a slight ridge beneath the ball. The slot does penetrate this ridge. This pin size will fit Guild, Yamaha LS400 & Takamine (12 String).

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Size 5.1 and 5.2

These pins re-create the simple, classic look of the original ivory pins used by Martin in the 20's and 30's. Vintage guitars will use a Size 5.1 with no string slot. Modern guitars, including Vintage Reissues, will use either a slotted (5.1) (3 degree taper, 0.210 below skirt) or slotted (5.2) (5 degree taper, 0.220 below skirt).



Shaft slot pin tool

If you are unsure of your pin size, you can send us one of your original pins to be matched. We normally send the new set out the same day as we receive your original.

Shaft Slot Pin Lock


We manufacture our own product line as well as any blue print or detail you need!

Shaft Slot Pin Connector


Please call us today for any part you may need. We manufacture a wide range of industry standard parts as well as from our own product line. If you have a part number we can look it up just give us a call 586-463-5888 or email. All of our products, blueprints, and details can be made in standard or metric. We do welding and sub-assemblies too! We became one of the first companies to upgrade our ISO program to the 2008/2015 Standard.


Ask for your catalog today!


Head / Headless Shaft Assemblies, Stub Shafts, Thread Studs, Shoulder Screws, Leveling Screws, Tubular Spaces, Jig Feet, Stop Buttons, Stop Blocks, Locating / Drive Keys, Fitting / Grind Spacers, Tap Pads, Drill Bushings, Fixture Pins, Trunnions, Clevis Assemblies, Couplers, Adaptors, Leveling & Positioning Blocks, Rest Pads, Fixture KeysSwitch Rods and Dogs, Swing Bolts, and many others.


Masterline Products


  • Head/Headless Shaft Assemblies
  • Stub Shafts
  • Shoulder Bolts
  • Threaded Studs
  • Leveling Screw Assemblies
  • Tubular Spacers
  • Jig Feet
  • Stop Buttons
  • Stop Blocks
  • Locating/Drive Keys
  • Fitting/Grind Spacers
  • Tap Pads

Shaft Slot Pin Tool