dies
Dies are available in a variety of styles. Each die has features especially designed to overcome specific threading applications. The descriptions below will assist the die user in making a selection of the dies needed for their specific threading application.
CHOOSE A DIE TYPE

ROUND ADJUSTABLE DIES
Round Adjustable Dies - General Purpose - High Speed Steel page 226
HSS Round Adjustable Dies, also known as Button Dies, are designed for cutting external screw threads, either by hand, using a die stock or by machine, using a floating die holder. They also can be used to cut smaller or larger, than factory setting, by turning the adjusting screw in or out. Dies are manufactured with a 2-3 thread chamfer on front face and a 1-1½ thread chamfer on the rear.
Metric Round Adjustable Dies - High Speed Steel page 228
HSS Metric Round Adjustable Dies, also known as Metric Button Dies, are designed for cutting external screw metric threads, either by hand, using a die stock or by machine, using a floating die holder. They also can be used to cut smaller or larger, than factory setting, by turning the adjusting screw in or out.
Special Thread Round Adjustable Dies - High Speed Steel page 230
HSS Special Thread Round Adjustable Dies are designed for threading applications where standard, coarse, fine or extra-fine threads are not applicable or where design considerations require non-standard pitches. They can also be used to cut smaller or larger than factory settings by turning the adjusting screw in or out.
Metric Special Thread Round Adjustable Dies - High Speed Steel page 229
HSS Metric Special Thread Round Adjustable Dies are designed for threading applications where standard, coarse, fine or extra-fine metric threads are not applicable or where design considerations require non-standard pitches. They can also be used to cut smaller or larger than factory settings by turning the adjusting screw in or out.
BRITISH STANDARD
British Standard Round Adjustable Dies - High Speed Steel page 232
HSS British Standard Round Adjustable Dies (BRAD) are the metric/European equivalent of American Round Dies.
LEFT HAND
Left Hand Round Adjustable Dies - High Speed Steel page 227
HSS Left Hand Round Adjustable Dies are designed for cutting left hand external screw threads, either by hand, using a diestock or by machine using a die holder. Left hand threads are used to secure rotating parts where a regular rotation would tighten the nut, and in applications where left hand studs and fastners are needed. They can also be used to cut smaller or larger than factory settings by turning the adjusting screw in or out. Commonly used for threading rods, bolts and studs.
Left Hand Metric Round Adjustable Dies - High Speed Steel page 227
HSS Left Hand Metric Round Adjustable Dies are designed for cutting left hand external screw metric threads, either by hand, using a diestock or by machine using a die holder. Left hand threads are used to secure rotating parts where a regular rotation would tighten the nut, and in applications where left hand studs and fastners are needed. They can also be used to cut smaller or larger than factory settings by turning the adjusting screw in or out. Commonly used for threading rods, bolts and studs.
ROUND ADJUSTABLE PIPE DIES
Round Adjustable Straight Pipe Dies - High Speed Steel page 231
HSS Round Adjustable NPS Straight Pipe Dies are designed for cutting external NPS straight pipe threads on pipes, tubing or where external NPS straight threads are required. They can be used by hand, using a die stock or by a machine using a die holder. They also can be set to cut smaller or larger than factory setting by turning the adjusting screw.
Round Adjustable Taper Pipe Dies - High Speed Steel page 231
HSS Round Adjustable NPT Taper Pipe Dies are designed for cutting external NPT taper pipe threads on pipes, tubing or where external NPT taper threads are required. They can be used by hand, using a die stock or by a machine using a die holder. They also can be set to cut smaller or larger than factory setting by turning the adjusting screw.
BRITISH STANDARD
British Standard Round Adjustable Parallel Pipe Dies - High Speed Steel page 231A
HSS British Standard (BSPP) Round Adjustable Parallel Pipe Dies are the metric/European equivalent of American (NPS) Standard Straight Pipe Taps and are sometimes referred to as Metric Parallel Pipe Dies. They are designed for cutting external BSPP British Standard pipe parallel threads on pipes and tubing or where external BSPP Parallel Pipe Threads are required. They can be used by hand, using a diestock, or by machine using a die holder. They also can be set to cut smaller or larger than factory setting by turning the adjusting screw. Note: American and British Standards are not interchangeable.
British Standard Round Adjustable Taper Pipe Dies - High Speed Steel page 231A
HSS British Standard (BSPT) Round Adjustable Taper Pipe Dies are the metric/European equivalent of American (NPT) Standard Taper Pipe Taps and are sometimes referred to as Metric Taper Pipe Dies. They are designed for cutting external BSPT British Standard Pipe Taper threads on pipes and tubing or where external BSPT Taper Pipe Threads are required. They can be used by hand, using a diestock, or by machine using a die holder. They also can be set to cut smaller or larger than factory setting by turning the adjusting screw. Note: American and British Standards are not interchangeable.
ROUND SOLID DIES
Automatic Thread Dies - Cobalt page 231C
Cobalt Automatic Thread Dies are designed for automatic thread cutting machines and lathes with 2 holding holes. Their solid cobalt construction design guarantees a precise repetitive accuracy and longer tool life than regular HSS dies.
HEXAGON THREADING DIES
Hexagon Threading Dies - Fractional - High Speed Steel page 238
HSS Hex Threading Dies are designed for tough cutting applications of all types of external threads. They are used for threading rods, bolts, and studs. Two standard diameters of Hex Dies simplify die stock handle requirements. ICS Hex Threading Dies have polished gold face and black surface treated threads for maximum performance.
Hexagon Threading Dies - Pipe - High Speed Steel page 238
HSS Hex Threading (NPT) Pipe Dies are designed for external threading or rethreading of taper pipe threads. They are used where threaded connection will not be required to withstand high fluid or gas pressures and the use of a sealer is acceptable.
Hexagon Threading Dies - Hex Nut Diameter - High Speed Steel page 239
HSS Hexagon (Hex Nut Diameter) Threading Dies are designed for tough cutting applications of all types of external threads. They are used for threading rods, bolts, and studs. All sizes are manufactured to be the same size as a Hex Nut of equal thread size. ICS Hex Threading Dies have polished gold face and black surface treated threads for maximum performance.
Automotive Hexagon Rethreading Dies page 239B
Carbon Steel Hexagon Automotive Rethreading Dies were designed to have a much smaller width across the flats than other hex dies to allow mechanics to repair damaged threads in tight spots. They are not designed for cutting new threads or to renew hardened threads.
HEXAGON RETHREADING DIES
CARBON STEEL
AUTOMOTIVE Hexagon Rethreading Dies page 239B
Carbon Steel Hexagon Automotive Rethreading Dies were designed to have a much smaller width across the flats than other hex dies to allow mechanics to repair damaged threads in tight spots. They are not designed for cutting new threads or to renew hardened threads.
Bearing Locknut Hexagon Rethreading Dies - Carbon Steel page 231B
Carbon Steel Bearing Locknut Hexagon Rethreading Dies are designed for cutting new threads or for rethreading damaged threads on bearing locknut spindles and to clean out built up locking compound on threads. All dies conform to ABMA (American Bearing Manufacturer’s Association) standards.
British Standard Hexagon Rethreading Dies page 232
Carbon Steel British Standard Hexagon Rethreading Dies are designed for rethreading damaged or jammed threads and can be used to work in places where round dies can not be used. They are not intended for producing new threads on unthreaded bars, bolts, or pipes and will perform all of the same tasks as (HRD) Hex Rethreading Dies.
Hexagon Rethreading Dies - Standard Sizes page 237
Carbon Steel Hexagon Rethreading Dies are designed for rethreading damaged or jammed threads and can be used to work in places where round dies can not be used. They are not intended for producing new threads on unthreaded bars, bolts, or pipes and will perform all of the same tasks as (HRD) Hex Rethreading Dies. All sizes are manufactured using three standard hex stock diameters to reduce costs and simplify die stock or wrench requirements.
Hexagon Rethreading Pipe Dies - (NPT) page 237
TOOL STEEL
Hexagon Rethreading Dies - Standard Sizes page 233
Tool Steel Hexagon Rethreading Dies are precision Tool Steel Dies, not to be confused with standard (HXD) Hexagon Dies. Dies are extra thick to permit user to rethread damaged or jammed threads and are not intended for producing new threads on unthreaded bars, bolts, or pipes. Dies are same size as standard Hex nuts.
Metric Hexagon Rethreading Dies page 235
Tool Steel Metric Hexagon Rethreading Dies are precision Tool Steel Dies, not to be confused with standard Metric Hexagon Dies. Dies are extra thick to permit user to rethread damaged or jammed metric threads and are not intended for producing new threads on unthreaded bars, bolts, or pipes. Metric dies are same size as standard metric Hex nuts.
Special Thread Hexagon Rethreading Dies page 234
Tool Steel Special Thread Hexagon Rethreading Dies are designed for rethreading damaged or jammed non-standard threaded studs, bolts or rod. They are extra thick for more strength and are more durable than carbon steel hex rethreading dies and can be used to work in places where round die stocks cannot be used. They are not intended to cut new threads. All sizes are manufactured to be the same as a hex nut of equal thread size and can be used with any socket, open end, box, monkey, or adjustable wrench.
Special Thread Metric Hexagon Rethreading Dies page 235
Tool Steel Special Thread Metric Hexagon Rethreading Dies are designed for rethreading damaged or jammed non-standard metric threaded studs, bolts or rod. They are extra thick for more strength and are more durable than carbon steel metric hex rethreading dies and can be used to work in places where round die stocks cannot be used. They are not intended to cut new threads. All sizes are manufactured to be the same as a hex nut of equal thread size and can be used with any socket, open end, box, monkey, or adjustable wrench.
Hexagon Rethreading Taper Pipe Dies - (NPT) page 233
Tool Steel Rethreading Taper Pipe Dies are designed for rethreading damaged or jammed NPT taper pipe threads on pipes and tubing. They are extra thick for more strength and are more durable than carbon steel hex rethreading dies and can be used to work in places where round die stocks cannot be used. They are not intended to cut new threads. All sizes are manufactured to be the same as a hex nut of equal thread size and can be used with any socket, open end, box, monkey, or adjustable wrench.

LEFT HAND

Left Hand Hexagon Rethreading Dies page 233
Tool Steel Left Hand Hexagon Rethreading Dies are designed for rethreading damaged or jammed left hand threaded studs, bolts or rod. They are extra thick for more strength and are more durable than carbon steel hex rethreading dies and can be used to work in places where round die stocks cannot be used. They are not intended to cut new threads. All sizes are manufactured to be the same as a hex nut of equal thread size and can be used with any socket, open end, box, monkey, or adjustable wrench.
Left Hand Metric Hexagon Rethreading Dies page 233

HIGH SPEED STEEL
Acme Thread Hexagon Rethreading Dies - High Speed Steel page 239D
HSS Acme Thread Hexagon Rethreading Dies are of heavy duty construction for rethreading the broad, square threads on acme threaded rods and studs. They are used for general purpose acme threads with a class 2C thread fit. This is a looser fit than the class 2C precision acme thread.
Bearing Locknut Hexagon Rethreading Dies - High Speed Steel page 231B
HSS Bearing Locknut Hexagon Rethreading Dies are designed for cutting new threads or for rethreading damaged threads on bearing locknut spindles and to clean out built up locking compound on threads. All dies conform to ABMA (American Bearing Manufacturer�s Association) standards.
CONE DIES
Cone Dies page 239C
Acorn Cone Dies are designed with a straight hook angle for production threading work on steel parts using screw machine or other threading equipment. They are designed to project from the die holder with a short die chamfer for close to the shoulder threading. They are also known as Spring Dies, Taper Nose Dies, Acorn Dies, and Cap Adjusting Dies. (Advise if threading stainless or non-ferrous metals when ordering as they require a different hook angle.)
CONE DIE HOLDERS
Cone Die Holders page 239C
Cone Die Holders are designed for use on automatic bar machines or any machine that can be set to reverse once the correct thread length has been cut. This holder is used for external threading with cone dies. Cone die holders are also known as Spring Die Holders, Acorn Die Holders, Taper Nose Die Holders and Cap Adjusting Die Holders.
COIL ROD THREADING DIES
Coil Rod Threading Dies page 208A
High Speed Steel Coil Rod Thread Hexagon Dies are of heavy duty extra thick construction for the rethreading and threading of coil thread rods, bolts and studs.
SOLID SQUARE BOLT DIES
Solid Square Bolt Dies page 239E
Solid Square Bolt Dies are designed for rethreading damaged or jammed bolt threads and studs.
SQUARE TAPER (NPT) PIPE DIES
Square Taper (NPT) Pipe Dies page 239E
Solid Square Taper Pipe Dies are designed for rethreading damaged or jammed taper pipe threads and are used mainly by oil related industries, utilities, and general construction.
TWO PIECE ADJUSTABLE DIES
2 Piece Adjustable Dies page 239A
Two Piece Adjustable Dies have a wide range of threading adjustments compared to a round adjustable die. Each half has two cutting edges and are easy to sharpen. They have chamfered threads on both sides. One side has 2 to 3 chamfered threads for regular work and the other side has 1-1/2 chamfered threads for threading close to shoulder. Ideal for threading or thread repair work.
SETS
HEX DIE
TOOL STEEL
Hexagon Rethreading Die Sets page 240
  5 PC · 1/4 to 1/2 or M6 to M14
  8 PC · 1/4 to 3/4 or M6 to M20
10 PC · 1/4 to 1 or M6 to M24
  4 PC · 1-1/8 to 1-1/2 or M27 to M36
HIGH SPEED STEEL
Hexagon Rethreading Die Sets page 236
  5 PC · 1/4 to 1/2 or M6 to M14
  8 PC · 1/4 to 3/4 or M6 to M20
10 PC · 1/4 to 1 or M6 to M24
  4 PC · 1-1/8 to 1-1/2 or M27 to M36
Hexagon Rethreading Pipe Die Sets page 236
  6 PC · 1/8-27, 1/4-18, 3/8-18, 1/2-14, 3/4-14, 1-11-1/2
TAP AND HEX DIE
Tap And Hex Die Sets - 40pc - Metal Case page 241
ICS 40 piece Tap and Die Sets were originally designed to be a basic general purpose tap and die set for mechanics and DIY’ers for maintenance on domestic cars, motorcycles, and machinery that were manufactured using the unified inch thread standard. Each set contains the most popular sizes (#4-40 to 1/2-20) sizes that mechanics commonly use. Metal case has individual compartments for tap and die storage and easy access.
Tap And Hex Die Sets - 40pc - Metric - Metal Case page 241
ICS 40 piece Tap and Die Sets were originally designed to be a basic general purpose tap and die set for mechanics and DIY’ers for maintenance on foreign cars, motorcycles, and machinery that were manufactured using the unified inch thread standard. Each set contains the most popular sizes (M3.0 to M12.0) sizes that mechanics commonly use. Metal case has individual compartments for tap and die storage and easy access.
Tap And Hex Die Sets - 58pc - Metal Case page 242
ICS 58 piece Tap and Die Sets were originally designed to be a more advanced general purpose tap and die set for mechanics and DIY’ers for maintenance on domestic cars, motorcycles, and machinery that were manufactured using the unified inch thread standard. Each set contains the most popular sizes (#6-32 to 3/4-16) sizes that mechanics commonly use. Double layered metal case has individual compartments for tap and die storage and easy access.
Tap And Hex Die Sets - 65pc - Plastic Case page 243
ICS 65 piece Tap and Die Sets were originally designed to be a professional general purpose tap and die set for mechanics and DIY’ers for maintenance on domestic cars, motorcycles, and machinery that were manufactured using the unified inch thread standard. Each set contains the most popular sizes (#4-40 to 1-14) sizes that mechanics commonly use. Plastic case has individual compartments for tap and die storage and easy access.
Carbon Steel Tap And Hex Die Sets - 45pc - Plastic Case page 243A
45 Piece Carbon Steel Fractional Tap and Die Sets were originally designed to be a basic general purpose tap and die set for mechanics and DIY’ers for maintenance on domestic cars, motorcycles, and machinery that were manufactured using the unified inch thread standard. Each set contains the most popular sizes (1/4-20 to 1-14) sizes that mechanics commonly use. Plastic case has individual compartments for tap and die storage and easy access.
Carbon Steel Tap And Hex Die Sets - 45pc - Metric - Plastic Case page 243A
45 Piece Carbon Steel Metric Tap and Die Sets were originally designed to be a basic general purpose tap and die set for mechanics and DIY’ers for maintenance on foreign cars, motorcycles, and machinery that were manufactured using the unified inch thread standard. Each set contains the most popular sizes (M6 to M24) that mechanics commonly use. Plastic case has individual compartments for tap and die storage and easy access. With the advent of world trade, this set is now a staple in every tool box and workshop.

AUTOMOTIVE
Automotive Rethreading Tap and Hex Die Sets page 245B
Automotive Rethreading Taps are used to repair and clean out damaged internal threads without undercutting good threads. Good for removing nicks and burs. Automotive Rethreading Dies were designed to have a much smaller width across the flats than other hex dies to allow mechanics to repair damaged threads in tight spots. Automotive Taps and Dies are not designed for cutting new threads or to renew hardened threads.

TAP AND ROUND ADJUSTABLE DIE
Fractional page 245
21 Piece Tap and Round Adjustable Die Set - 1/4 to 3/4
Metric page 245
21 Piece Tap and Round Adjustable Die Set - M6 to M20
MINIATURE
Miniature Machine Screw Size Tap and Die Sets page 245C
30 piece HSS Machine Screw Size Miniature Tap and Die Sets are designed to be a professional general purpose tap and die set with all the most popular tap and die machine screw sizes (#0 to #4-40) for use by camera repair shops, clock repair shops, model builders, jewelry manufacturers, business machine repair, electronic equipment, mold and die makers, medical equipment repair, fishing lure manufacturers, and tongue and body piercing. Plastic case has individual compartments for tap and die storage and easy access.
Miniature Metric Tap and Die Sets page 245C
30 piece HSS Metric Size Miniature Tap and Die Sets are designed to be a professional general purpose tap and die set with all the most popular tap and die metric sizes (M1.00 to M2.50) for use by camera repair shops, clock repair shops, model builders, jewelry manufacturers, business machine repair, electronic equipment, mold and die makers, medical equipment repair, fishing lure manufacturers, and tongue and body piercing. Plastic case has individual compartments for tap and die storage and easy access.