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Dormer MTT-X E027/MTT-X E037 Powdered Metal Spiral Flute Threading Tap, Gold Oxide Finish, Round Shank With Square End, Modified Bottoming Chamfer

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Product Specifications
Surface Coating
Gold Oxide
Shank Type
Round With Square End
Material Type
High Speed Steel
Number of Flutes
3
UNSPSC Code
27112806
Chamfer Type
Semi-Bottoming
Brand Name
Dormer

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

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Currently showing 1-20 of 26 Next 6 »
#6-32 UNC E027 0.141" 0.261" 2" H2 581506 B003JY6LC0 2 $19.14 Buy Options
#8-32 UNC E027 0.168" 0.2484" 2.125" H2 581513 B003JY6LDO 2 $19.08 Buy Options
#10-24 UNC E027 0.194" 0.265" 2.375" H3 581520 B003JY6L8O 2 $19.07 Buy Options
#10-32 UNF E037 0.194" 0.265" 2.375" H2 582312 B003JY6MII 2 $19.07 Buy Options
#12-24 UNC E027 0.22" 0.252" 2.375" H3 581537 B003JY6L98 1 $19.54 Buy Options
1/4"-20 UNC E027 0.255" 0.3937" 2.5" H3 581544 B003JY6L84 2 $20.51 Buy Options
1/4"-28 UNF E037 0.255" 0.3937" 2.5" H3 582329 B003JY6MHY 2 $20.77 Buy Options
5/16"-18 UNC E027 0.318" 0.4567" 2.7188" H3 581551 B003JY6LAW 1 $23.20 Buy Options
5/16"-24 UNF E037 0.318" 0.4567" 2.7188" H3 582336 B003JY6ML0 1 $23.19 Buy Options
3/8"-16 UNC E027 0.381" 0.5315" 2.9375" H3 581568 B003JY6LAC 2 $25.16 Buy Options
3/8"-24 UNF E037 0.381" 0.5315" 2.9375" H3 582343 B003JY6MKG 1 $23.82 Buy Options
7/16"-14 UNC E027 0.323" 0.6299" 3.1563" H3 581575 B003JY6LCK 1 $31.02 Buy Options
7/16"-20 UNF E037 0.323" 0.6299" 3.1563" H3 582350 B003JY6MM4 1 $31.03 Buy Options
1/2"-13 UNC E027 0.367" 0.689" 3.375" H3 581582 B003JY6L7K 2 $39.44 Buy Options
1/2"-20 UNF E037 0.367" 0.689" 3.375" H3 582367 B003JY6MHE 2 $38.35 Buy Options
9/16"-12 UNC E027 0.429" 0.7087" 3.5938" H3 581599 B003JY6LDY 1 $58.73 Buy Options
9/16"-18 UNF E037 0.429" 0.7087" 3.5938" H3 582374 B003JY6MN8 1 $59.75 Buy Options
5/8"-11 UNC E027 0.48" 0.7087" 3.8125" H3 581605 B003JY6LBG 1 $58.73 Buy Options
5/8"-18 UNF E037 0.48" 0.7087" 3.8125" H3 582381 B003JY6MLK 1 $58.60 Buy Options
3/4"-10 UNC E027 0.59" 0.8858" 4.25" H4 581612 B003JY6L9S 1 $78.17 Buy Options

Key Features

  • Spiral flute tap pulls chips back from the tip of the tool and out of the hole to prevent clogging
  • Spiral flutes for creating threads in blind holes
  • Gold oxide finish reduces grinding stress within the tool
  • Powdered-metal steel for performance approaching that of solid carbide tools, with the toughness and shock-resistance of high-speed steel
  • Available in UNC (Unified Coarse) or UNF (Unified Fine) right-hand thread options for different applications

Product Description

The Dormer MTT-X E027/MTT-X E037 powdered-metal steel spiral flute tap has a round shank with a square end, gold oxide finish, and a modified bottoming chamfer, and is used to create right-hand threads in a range of materials, with best performance in steel, copper, brass, aluminum, and magnesium. It is available in two different ANSI thread specification standards: UNC (Unified Coarse) or UNF (Unified Fine). The 48-degree spiral flutes of this tap pull chips back from the tip of the tool, up and out of the hole to prevent clogging, making it suitable for blind or bottoming holes (with only one opening). Gold oxide is a low-temperature heat treatment that reduces grinding stress within the tool. The modified bottoming chamfer has additional length to reduce chip load, add tool life in difficult-to-machine materials, and permit higher tapping speeds.

Right-hand threads are designed to tighten when a head or nut is rotated clockwise (the most common threading direction). Powdered-metal steel offers performance that approaches that of solid carbide tools but with the toughness and shock-resistance of high-speed steel. The round shank with square end helps to minimize rotation in the tool holder. This tool can be used in machines, such as drill presses or lathes, or with hand tools such as tap wrenches.

In the Dormer MTT-X E027/MTT-X E037 series, all taps have three flutes and modified bottoming chamfers. This tap conforms to ANSI standards and can create threads to a depth two-and-a-half times its diameter. It is suitable for the ANSI 3B tolerance class: 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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