Which guide is correct for fitting a 9/16’s drill bit? The 9/16’s on this one is 43/64’s.

Good question! STI-UNC100SNP has the 9/16's marked over the biggest hole. Hope this helps. We have them in stock.

Are there 2 tap guides available one for unc & 1 for unf?

Basically it's a guide for SAE sized bolt or drill bits. The walls inside each hole are smooth. This one is not for metric. I bought this to sit on a surface that I will drill to keep my drill hole straight. It will sit on a flat surface as well sit perfectly on a corner. For example when installing a handle on a cabinet with a hole drilled in at a slant will cause the handle to not position flush to the surface when installed looking like a jank ass been slopping things up in there...

Why are the guide holes so much larger than nominal? nominal=>measurements: 1/2=>.608, 7/16=>.532, 3/8=>.458, 5/16=>.391, 1/4=.318

Can I use a tap guide as a drill guide? No, the tap guide is sized for tap diameters. The drill guide is sized for drill bits. There is a difference and if you attempt to use the tap guide as a drill guide there will be slop and inaccuracy.

Are these thread? can i put threaded npt to check tap?

Good question! Sorry these are not threaded. The holes are a Tap Guide. Hope this helps. We have them in stock.

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STI-UNC V-TapGuide

Product ID: 19581025

Details

Material
Nickel Alloy
Finish Type
Nickel
Shank Type
Round
Brand
Big Gator
Item dimensions L x W x H
4.75 x 1.13 x

📏Precision Alignment

🔩Universal Tap Sizes

⚙️Durable Alloy Steel

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SAR 152

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In stock

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Description

🔧 Elevate Your Threading Game!

USER FRIENDLY - Designed for both professionals and DIY enthusiasts, making threading a breeze.
PORTABLE DESIGN - Compact dimensions (4.75 x 1.13 x 0.88 inches) for easy transport and storage.
DURABLE CONSTRUCTION - Crafted from heat-treated nickel alloy steel for long-lasting performance.
PRECISION ENGINEERING - Precision ground base ensures perfect perpendicular alignment every time.
UNIVERSAL COMPATIBILITY - Covers 10 UNC thread sizes for versatile applications.

The Big Gator Tools BGRSTIUNC100SNP V-Tap Guide is a universal and portable tool designed for precise alignment of STI ground thread taps. It accommodates 10 different Unified Course Thread sizes and is made from durable heat-treated nickel alloy steel, ensuring both accuracy and longevity. Its compact design makes it an essential addition to any toolbox, perfect for both professional and DIY applications.

Specifications

Material	Nickel Alloy Steel
Finish Type	Nickel
Shank Type	Round
Brand	Big Gator Tools
Item dimensions L x W x H	4.75 x 1.13 x 0.88 inches
Tool Flute Type	Straight
Point Style	Guide Point
Surface Recommendation	Steel
UPC	613103042718
Unit Count	1.00 Count
Global Trade Identification Number	00613103042718
Manufacturer	Big Gator Tools
Item Weight	8 ounces
Product Dimensions	4.75 x 1.13 x 0.88 inches
Item model number	BGRSTIUNC100SNP
Is Discontinued By Manufacturer	No
Manufacturer Part Number	BGRSTIUNC100SNP

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