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Union Butterfield 1528S(UNC)/1528S(UNF)/1528S(UNS) High-Speed Steel Hand Tap Set, Uncoated (Bright) Finish, Round Shank with Square End, 3-Piece (1 Taper, 1 Plug, 1 Bottoming Chamfer)

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Product Specifications
Surface Coating
Uncoated (Bright)
Shank Type
Round With Square End
Material Type
High Speed Steel
UNSPSC Code
27112806
Chamfer Type
Multiple
Brand Name
Union Butterfield

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Thread Size Thread Type Manufacturer Series # Number of Flutes Shank Diameter Length of Threads Overall Length Pitch Diameter Limit Mfr Part # ASIN

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Currently showing 1-20 of 23 Next 3 »
#0-80 UNF 1528S(UNF) 2 0.141" 0.3125" 1.625" H1 1010999 B003JY605I yes $55.33 Buy Options
#1-64 UNC 1528S(UNC) 2 0.141" 0.375" 1.6875" H1 1011000 B003JY5ZZY yes $30.08 Buy Options
#1-72 UNF 1528S(UNF) 2 0.141" 0.375" 1.6875" H1 1011001 B003JY6080 yes $30.39 Buy Options
#2-56 UNC 1528S(UNC) 3 0.141" 0.4375" 1.75" H2 1011003 B003JY600I yes $27.25 Buy Options
#2-64 UNF 1528S(UNF) 3 0.141" 0.4375" 1.75" H2 1011073 B003JY608U yes $10.76 Buy Options
#3-48 UNC 1528S(UNC) 3 0.141" 0.5" 1.8125" H2 1011005 B003JY601C yes $23.13 Buy Options
#3-56 UNF 1528S(UNF) 3 0.141" 0.5" 1.8125" H2 1011074 B003JY609E yes $24.80 Buy Options
#4-36 UNS 1528S(UNS) 3 0.141" 0.5625" 1.875" H2 1011006 B003JY60DA yes $6.78 Buy Options
#4-40 UNC 1528S(UNC) 3 0.141" 0.5625" 1.875" H2 1011008 B003JY6026 yes $21.36 Buy Options
#4-48 UNF 1528S(UNF) 3 0.141" 0.5625" 1.875" H2 1011075 B003JY609Y yes $7.50 Buy Options
#5-40 UNC 1528S(UNC) 3 0.141" 0.625" 1.9375" H2 1011010 B003JY602G yes $20.74 Buy Options
#5-44 UNF 1528S(UNF) 3 0.141" 0.625" 1.9375" H2 1011076 B003JY60AS yes $7.48 Buy Options
#6-32 UNC 1528S(UNC) 3 0.141" 0.6875" 2" H2 1011012 B003JY6030 yes $17.97 Buy Options
#6-32 UNC 1528S(UNC) 3 0.141" 0.6875" 2" H3 1011013 B003JY603K yes $17.63 Buy Options
#6-40 UNF 1528S(UNF) 3 0.141" 0.6875" 2" H2 1011014 B003JY60BC Usually ships in 3 to 6 weeks $19.59 Buy Options
#8-32 UNC 1528S(UNC) 4 0.168" 0.75" 2.125" H2 1011016 B003JY6044 yes $18.34 Buy Options
#8-32 UNC 1528S(UNC) 4 0.168" 0.75" 2.125" H3 1011017 B003JY604Y yes $17.85 Buy Options
#8-36 UNF 1528S(UNF) 3 0.168" 0.75" 2.125" H2 1011018 B003JY60BW yes $5.91 Buy Options
#10-24 UNC 1528S(UNC) 4 0.194" 0.875" 2.375" H2 1011020 B003JY5ZY0 yes $17.48 Buy Options
#10-24 UNC 1528S(UNC) 4 0.194" 0.875" 2.375" H3 1011021 B003JY5ZYK yes $19.32 Buy Options

Key Features

  • Hand threading tap set with straight flutes cuts threads in through holes and blind holes
  • Machine-screw tap sizes, in frequent demand for many industries and products
  • 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, for use on a broad range of materials

Product Description

The Union Butterfield 1528(UNC)/1528(UNF)/1528(UNS) uncoated, high-speed steel three-piece hand threading tap set (including tapering, plug, and bottoming chamfers) has straight flutes and round shanks with square ends, and is used to create machine-screw sized 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). Machine-screw sizes are used frequently in many industries and products.

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 Union Butterfield 1528S(UNC) series, taps that are machine-screw size 1 have two flutes, sizes 2 through 6 have three flutes, and sizes 8 through 12 have four flutes. In the 1528S(UNF) series, taps that are sizes 0 and 1 have two flutes, sizes 2 through 6 have three flutes, and sizes 8 through 12 have four flutes. 1528S(UNS) taps are available in size 4, with three flutes. This tap set 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.

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