Click for larger image and other views Image is representative of the product family. Select individual products in the table below for more specific images and product specifications

How can we improve our images or Product Specifications?

Union Butterfield 1508(UNC)/1508(UNF)/1508(UNS) High-Speed Steel Hand Tap, Uncoated (Bright) Finish, Round Shank With Square End

Be the first to review this item

Product Specifications
Cutting Direction
Surface Coating
Uncoated (Bright)
Shank Type
Round With Square End
Pitch Diameter Limit
Material Type
High Speed Steel
Number of Flutes
Brand Name
Union Butterfield
System of Measurement
Fractional Inch

This item is no longer available

These items ship for FREE with 2-Day Shipping on orders over $50. (Details)

Want it delivered on Tue, Feb 3? Order in-stock items in the next 2 days 26 mins and choose One-Day Shipping at checkout.

  • Share
Currently showing 1-17 of 17
Thread Size Thread Type Manufacturer Series # Chamfer Type Shank Diameter Length of Threads Overall Length Mfr Part # ASIN

The Amazon Standard Item Number (ASIN) uniquely identifies
the item in the (and Amazon) catalog.


If an item is currently out of stock, but has an estimated lead time, you can place an order now and we will ship it as soon as it is available.
You can also order more than we currently have in stock.
Read more about back orders in our help section.

All All All All All All All All      
Currently showing 1-17 of 17
1/4"-20 UNC 1508(UNC) Plug 0.255" 1" 2.5" 1010216 B003JTIQG4 yes $14.50 Buy Options
1/4"-20 UNC 1508(UNC) Bottoming 0.255" 1" 2.5" 1010219 B003JTIQGO yes $14.50 Buy Options
1/4"-28 UNF 1508(UNF) Plug 0.255" 1" 2.5" 1010223 B003JTIQL4 yes $14.56 Buy Options
1/4"-28 UNF 1508(UNF) Bottoming 0.255" 1" 2.5" 1010226 B003JTIQLO yes $14.80 Buy Options
5/16"-18 UNC 1508(UNC) Plug 0.318" 1.125" 2.7188" 1010230 B003JTIQIM yes $14.83 Buy Options
5/16"-18 UNC 1508(UNC) Bottoming 0.318" 1.125" 2.7188" 1010233 B003JTIQJG yes $4.94 Buy Options
5/16"-24 UNF 1508(UNF) Bottoming 0.318" 1.125" 2.7188" 1010237 B003JTIQOG yes $15.38 Buy Options
5/16"-24 UNF 1508(UNF) Plug 0.318" 1.125" 2.7188" 1010236 B003JTIQNW yes $14.83 Buy Options
3/8"-16 UNC 1508(UNC) Plug 0.381" 1.25" 2.9375" 1010240 B003JTIQHI yes $5.25 Buy Options
3/8"-16 UNC 1508(UNC) Bottoming 0.381" 1.25" 2.9375" 1010243 B003JTIQHS yes $16.13 Buy Options
3/8"-24 UNF 1508(UNF) Plug 0.381" 1.25" 2.9375" 1010246 B003JTIQM8 yes $5.66 Buy Options
3/8"-24 UNF 1508(UNF) Bottoming 0.381" 1.25" 2.9375" 1010247 B003JTIQN2 yes $5.68 Buy Options
7/16"-14 UNC 1508(UNC) Plug 0.323" 1.4375" 3.1563" 1010248 B003JTIQK0 yes $6.59 Buy Options
7/16"-20 UNF 1508(UNF) Plug 0.323" 1.4375" 3.1563" 1010250 B003JTIQP0 yes $6.59 Buy Options
1/2"-13 UNC 1508(UNC) Plug 0.367" 1.6563" 3.375" 1010252 B003JTIQEQ yes $21.84 Buy Options
1/2"-13 UNC 1508(UNC) Bottoming 0.367" 1.6563" 3.375" 1010253 B003JTIQFK Usually ships in 10 to 12 days $23.26 Buy Options
1/2"-20 UNF 1508(UNF) Plug 0.367" 1.6563" 3.375" 1010254 B003JTIQKK yes $24.14 Buy Options

Key Features

  • Hand threading tap with straight flutes cuts threads in through holes and blind holes
  • Available in UNC (Unified Coarse), UNF (Unified Fine), or UNS (Unified Special) right-hand thread options for different applications
  • High-speed steel is compatible with a variety of materials
  • Uncoated (bright) tools have no additional surface treatment or coating, suitable for general-purpose applications
  • Round shank with square end allows tap to be used in hand or power-driven applications

Product Description

The Union Butterfield 1508(UNC)/1508(UNF)/1508(UNS) uncoated, high-speed steel hand threading tap has straight flutes and a round shank with a square end, and is used to create right-hand threads in a range of materials. It is available in three different ANSI thread specification standards: UNC (Unified Coarse), UNF (Unified Fine), or UNS (Unified Special). The straight flutes are suitable for threading through holes (extending through the workpiece) and blind or bottoming holes (with only one opening).

Right-hand threads are designed to tighten when the head or nut is rotated clockwise (the most common threading direction). High-speed steel (HSS) is a common general-purpose steel for cutting tools and is compatible with a variety of materials. With no coating or surface treatment, this uncoated tool can be used on a broad range of materials and provides an economical alternative to coated tools. The round shank with square end makes it suitable for hand or power-driven applications. This tool can be used in machines, such as drill presses or lathes, or with hand tools such as tap wrenches.

In the 1508(UNF) series, all taps have three flutes. Taps in all series are available with a variety of chamfers. This tap conforms to ANSI standards and can create threads to a depth 1 ½ times its diameter. It is suitable for ANSI 2B and 3B tolerance classes: 2B is an average quality fit for commercial and industrial fasteners; 3B produces close-tolerance fasteners that resist loosening, as in aerospace applications.

Taps produce internal threads in previously formed holes and can be used in machines (such as drill presses) or with hand tools. Common types of taps include hand taps, spiral point taps, spiral flute taps, thread forming taps, and pipe taps. Hand taps (straight-flute taps) collect chips in the straight flutes of the tool; spiral point taps push chips through holes ahead of the tool; and spiral flute taps pull chips back from the tip of the tool, up and out the hole. Thread forming taps, also known as cold forming taps, press rather than cut to create threads in a drilled hole, and no chips are created. Pipe taps create threads in pipes and pipe fittings. Each thread type designates a thread profile and each type is identified with an abbreviation. In the U.S. and Canada, the Unified Thread Standard is the dominant thread type, including UNC (Unified Coarse), UNF (Unified Fine), and NPT (National Pipe Taper) threads, among others.

Precision Dormer manufactures cutting tools under the following brands: Precision Twist, Dormer, and Union Butterfield. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.

How can we improve our Product Description?

Customer Reviews

There are no customer reviews yet.

Be the first to review this item

Go to the HomePage

Order by Phone
M-F 8am-10pm ET, Sat-Sun 8am-5pm ET 800-220-4242

My Account| Returns| Help

Website Feedback| Contact Us| Sell on AmazonSupply| Become an Affiliate

Privacy Notice| Conditions of Use

Follow Us 

© 2015, Inc. and its affiliates.