Table of Contents. Standard Taps

Transcription

1 Table of Contents Standard Taps Standard Taps--High Speed Steel Machine Screw Sizes... 2 Standard Taps--High Speed Steel Hand Taps (Fractional Sizes)... 4 Standard Taps--High Speed Steel Machine Screw Sizes--Tap Sets... 7 Standard Taps--High Speed Steel Fractional Sizes--Tap Sets... 8 Standard Taps--High Speed Steel Metric Sizes Straight Flute... 9 Standard Taps--High Speed Steel Metric Spiral Point, Plug Style Standard Taps--High Speed Steel Metric Tap Sets Standard Taps--High Speed Steel Spiral Point, Plug Style Standard Taps--High Speed Steel Spiral Point, Bottom Style Standard Taps--High Speed Steel Spiral Point, Fluteless, GH3, Plug Style Standard Taps--Spiral Point Extensions--6 Overall Length, H3, Plug Style Standard Taps--High Speed Steel Pulley Taps Standard Taps--High Speed Steel Nut Taps Standard Taps--High Speed Steel Spiral Fluted, Fast (approx 50 degree) Standard Taps--High Speed Steel Spiral Fluted, Regular (approx 30 degree) Standard Taps--High Speed Steel Metric Spiral Fluted Standard Taps--Jarflos (forming taps), Bottoming Style Standard Taps--Jarflos (forming taps), Plug Style Standard Taps--Metric Jarflos Jarflo Nucon Drills Standard Taps--Pipe Taps, Tapered Standard Taps--Pipe Taps, Tapered, Interrupted Standard Taps--Pipe Taps, Tapered, Small Shank Standard Taps--Pipe Taps, Tapered Small Shank, Interrupted Standard Taps--Pipe Taps, Straight Standard Taps--Pipe Taps, Straight, Small Shank Standard Taps--Screw Thread Insert (STI) Taps, Straight Flute Standard Taps--Screw Thread Insert (STI) Taps, Spiral Point Special Taps Special Taps-Stub Jarflos for in-die tapping Special Taps J80 s Special Taps--Left Hand--Plug, Bottom and Taper Special Taps--National Extra Fine (NEF)--Plug, Bottom and Taper Special Taps Oversize Straight Flute--Plug, Bottom, Taper Special Taps Oversize Spiral Point--Plug Special Taps--Combination Drill and Tap... 32

2 Standard Taps--High Speed Steel Machine Screw Sizes Machine screw taps are basically the same as hand taps and can be used wherever hand taps are applicable. The major difference between the two is the method of designation. Machine screw taps are identified by size using numbers #0 through #12 instead of fractions. Each number starting with #0 increases the nominal diameter inches to the next consecutive size. The term hand tap is typically used to denote a fractional tap size. Although the name implies a hand operation, it is found in common use on all production machines. Taps with a taper chamfer are useful in starting a tapped thread square with the part. The plug chamfered tap, however, is the most widely used tap in both hand and production tapping. Tap Description Plug Bottom Taper 0 80 H1 2FL H2 2FL H1 2FL H2 2FL H1 2FL H2 2FL H1 2FL H2 2FL H1 3FL H2 3FL H2 3FL H2 2FL H1 3FL H2 3FL H1 3FL H2 3FL H1 2FL H2 2FL H3 2FL H1 3FL H2 3FL H1 3FL H2 3FL H2 2FL H1 3FL H2 3FL H2 3FL H1 2FL H2 2FL H3 2FL H1 3FL H2 3FL H3 3FL

3 Standard Taps--High Speed Steel Machine Screw Sizes Tap Description Plug Bottom Taper 6 40 H2 2FL H1 3FL H2 3FL H1 2FL H2 2FL H3 2FL H2 3FL H3 3FL H7 3FL H1 4FL H2 4FL H3 4FL H7 4FL H1 4FL H2 4FL H2 2FL H3 2FL H2 3FL H3 3FL H7 3FL H1 4FL H2 4FL H3 4FL H7 4FL H1 2FL H2 2FL H3 2FL H2 3FL H3 3FL H7 3FL H1 4FL H2 4FL H3 4FL H7 4FL H3 4FL H1 4FL H3 4FL

4 Standard Taps--High Speed Steel Hand Taps (Fractional Sizes) Tap Description Plug Bottom Taper 1/4 20 H2 2FL /4 20 H3 2FL /4 20 H1 3FL /4 20 H2 3FL /4 20 H3 3FL /4 20 H5 3FL /4 20 H1 4FL /4 20 H2 4FL /4 20 H3 4FL /4 20 H5 4FL /4 28 H2 2FL /4 28 H3 2FL /4 28 H1 3FL /4 28 H3 3FL /4 28 H1 4FL /4 28 H2 4FL /4 28 H3 4FL /4 28 H4 4FL /16 18 H3 2FL /16 18 H3 3FL /16 18 H5 3FL /16 18 H1 4FL /16 18 H2 4FL /16 18 H3 4FL /16 18 H5 4FL /16 24 H3 3FL /16 24 H1 4FL /16 24 H2 4FL /16 24 H3 4FL /16 24 H4 4FL /8 16 H1 3FL /8 16 H2 3FL /8 16 H3 3FL /8 16 H5 3FL /8 16 H1 4FL /8 16 H2 4FL /8 16 H3 4FL /8 16 H5 4FL /8 24 H3 3FL /8 24 H1 4FL /8 24 H2 4FL /8 24 H3 4FL /8 24 H4 4FL

5 Standard Taps--High Speed Steel Hand Taps (Fractional Sizes) Tap Description Plug Bottom Taper 7/16 14 H3 3FL /16 14 H1 4FL /16 14 H2 4FL /16 14 H3 4FL /16 14 H5 4FL /16 20 H3 3FL /16 20 H1 4FL /16 20 H3 4FL /16 20 H5 4FL /2 13 H2 3FL /2 13 H3 3FL /2 13 H1 4FL /2 13 H2 4FL /2 13 H3 4FL /2 13 H5 4FL /2 20 H3 3FL /2 20 H1 4FL /2 20 H2 4FL /2 20 H3 4FL /2 20 H5 4FL /16 12 H3 4FL /16 12 H5 4FL /16 18 H2 4FL /16 18 H3 4FL /16 18 H5 4FL /8 11 H2 4FL /8 11 H3 4FL /8 11 H5 4FL /8 18 H2 4FL /8 18 H3 4FL /8 18 H5 4FL /16 11 H3 4FL /16 16 H3 4FL /4 10 H1 4FL /4 10 H2 4FL /4 10 H3 4FL /4 10 H5 4FL

6 Standard Taps--High Speed Steel Hand Taps (Fractional Sizes) Tap Description Plug Bottom Taper 3/4 16 H1 4FL /4 16 H2 4FL /4 16 H3 4FL /4 16 H4 4FL /4 16 H5 4FL /8 9 H2 4FL /8 9 H4 4FL /8 9 H6 4FL /8 14 H2 4FL /8 14 H4 4FL /8 14 H6 4FL H4 4FL H6 4FL H4 4FL H2 4FL H4 4FL /8 7 H4 4FL /8 12 H4 4FL /4 7 H4 4FL /4 12 H4 6FL /8 6 H4 4FL /8 12 H4 6FL /2 6 H4 4FL /2 12 H4 6FL

7 Standard Taps--High Speed Steel Machine Screw Sizes--Tap Sets Tap Description Part Number 0 80 H1 2FL H1 2FL H1 2FL H1 3FL H2 3FL H2 3FL H2 3FL H2 3FL H1 3FL H2 3FL H2 3FL H1 3FL H2 3FL H1 3FL H2 3FL H3 3FL H2 3FL H1 4FL H2 4FL H3 4FL H2 4FL H1 4FL H2 4FL H3 4FL H1 4FL H2 4FL H3 4FL H3 4FL H3 4FL

8 Standard Taps--High Speed Steel Fractional Sizes--Tap Sets Tap Description Part Number Tap Description Part Number 1/4 20 H1 4FL /4 20 H2 4FL /4 20 H3 4FL /4 28 H2 4FL /4 28 H3 4FL /16 18 H2 4FL /16 18 H3 4FL /16 24 H2 4FL /16 24 H3 4FL /8 16 H1 4FL /8 16 H2 4FL /8 16 H3 4FL /8 24 H2 4FL /8 24 H3 4FL /16 14 H3 4FL /16 20 H3 4FL /2 13 H3 4FL /2 20 H3 4FL /16 12 H3 4FL /16 18 H3 4FL /8 11 H3 4FL /8 18 H3 4FL /16 11 H3 4FL /16 16 H3 4FL /4 10 H3 4FL /4 16 H3 4FL /8 9 H4 4FL /8 14 H4 4FL H4 4FL H4 4FL H4 4FL /8 7 H4 4FL /8 12 H4 4FL /4 7 H4 4FL /4 12 H4 6FL /8 16 H4 4FL /8 12 H4 6FL /2 6 H4 4FL /2 12 H4 6FL

9 Standard Taps--High Speed Steel Metric Sizes Straight Flute Tap Description Plug Bottom Taper M1.6 X 0.35 D3 2FL M2.0 X 0.40 D3 3FL M2.2 X 0.45 D3 3FL M2.5 X 0.45 D3 3FL M3.0 X 0.50 D3 3FL M3.5 X 0.60 D4 3FL M4.0 X 0.70 D4 4FL M4.5 X 0.75 D4 4FL M5.0 X 0.80 D4 4FL M6.0 X 1.00 D5 4FL M7.0 X 1.00 D5 4FL M8.0 X 1.25 D5 4FL M9.0 X 1.25 D5 4FL M10 X 1.50 D6 4FL M11 X 1.50 D6 4FL M12 X 1.75 D6 4FL M14 X 2.00 D7 4FL M16 X 2.00 D7 4FL M18 X 2.50 D7 4FL M20 X 2.50 D7 4FL M22 X 2.50 D7 4FL M24 X 3.00 D8 4FL M27 X 3.00 D8 4FL M30 X 3.50 D9 4FL M33 X 3.50 D9 4FL M36 X 4.00 D9 4FL

10 Standard Taps--High Speed Steel Metric Spiral Point, Plug Style Tap Description Part Number M1.6 X 0.35 D3 2FL M2.0 X 0.40 D3 2FL M2.5 X 0.45 D3 2FL M3.0 X 0.50 D3 2FL M3.5 X 0.60 D4 2FL M4.0 X 0.70 D4 2FL M5.0 X 0.80 D4 2FL M6.0 X 1.00 D5 2FL M7.0 X 1.00 D5 2FL M8.0 X 1.25 D5 2FL M10 X 1.50 D6 3FL M12 X 1.75 D6 3FL M14 X 2.00 D7 3FL M16 X 2.00 D7 3FL M18 X 2.50 D7 3FL M20 X 2.50 D7 3FL Standard Taps--High Speed Steel Metric Tap Sets Tap Description Part Number M1.6 X 0.35 D3 2FL M2.0 X 0.40 D3 3FL M2.5 X 0.45 D3 3FL M3.0 X 0.50 D3 3FL M3.5 X 0.60 D4 3FL M4.0 X 0.70 D4 4FL M5.0 X 0.80 D4 4FL M6.0 X 1.00 D5 4FL M8.0 X 1.25 D5 4FL M10 X 1.50 D6 4FL M12 X 1.75 D6 4FL M14 X 2.00 D7 4FL M16 X 2.00 D7 4FL M20 X 2.50 D7 4FL M24 X 3.00 D8 4FL M30 X 3.50 D9 4FL M36 X 4.00 D9 4FL

11 Standard Taps--High Speed Steel Spiral Point, Plug Style Spiral pointed taps are recommended for machine tapping of through or open holes and for blind holes with sufficient chip-room below the full threads required. As a result of the spiral point grind, the chips are forced ahead of the tap with the least amount of resistance to the thrust. This feature makes it possible to build additional strength into the tap and allows a better flow of lubricant to the cutting edges. The use of the spiral pointed tap prevents chips from packing in the flutes or wedging between the flanks and the work, a major cause of breakage particularly in the small size taps. Generally, spiral pointed taps can be run at higher speeds as they require less torque to drive and are recommended for all materials except the abrasive group such as cast-iron and plastics. Bottoming spiral pointed taps are similar to the plug spiral pointed tap except for the style of chamfer. This style of tap tends to form a tightly curled broken chip, thus making chip removal easier. Bottoming spiral pointed taps can be used for blind hole tapping where sufficient space can be provided at the bottom of the hole to accommodate chips. Tap Description Part Number 0 80 H1 2FL H2 2FL H1 2FL H2 2FL H1 2FL H2 2FL H1 2FL H2 2FL H5 2FL H1 2FL H2 2FL H1 2FL H2 2FL H1 2FL H2 2FL H2 2FL H1 2FL H2 2FL H3 2FL H5 2FL H1 2FL H2 2FL H1 2FL H2 2FL H3 2FL H2 2FL

12 Standard Taps--High Speed Steel Spiral Point, Plug Style Tap Description Part Number 6 32 H1 2FL H2 2FL H3 2FL H5 2FL H7 2FL H1 2FL H2 2FL H1 2FL H2 2FL H3 2FL H5 2FL H7 2FL H1 2FL H2 2FL H1 2FL H2 2FL H3 2FL H5 2FL H7 2FL H1 2FL H2 2FL H3 2FL H5 2FL H7 2FL H1 2FL H3 2FL H3 2FL

13 Standard Taps--High Speed Steel Spiral Point, Plug Style Tap Description Part Number 1/4 20 H1 2FL /4 20 H2 2FL /4 20 H3 2FL /4 20 H5 2FL /4 20 H3 3FL /4 20 H5 3FL /4 28 H1 2FL /4 28 H2 2FL /4 28 H3 2FL /4 28 H4 2FL /4 28 H2 3FL /4 28 H3 3FL /4 28 H4 3FL /16 18 H1 2FL /16 18 H2 2FL /16 18 H3 2FL /16 18 H5 2FL /16 18 H3 3FL /16 18 H5 3FL /16 24 H1 2FL /16 24 H2 2FL /16 24 H3 2FL /16 24 H4 2FL /16 24 H2 3FL /16 24 H4 3FL /8 16 H1 3FL /8 16 H2 3FL /8 16 H3 3FL /8 16 H5 3FL /8 24 H1 3FL /8 24 H2 3FL /8 24 H3 3FL /8 24 H4 3FL

14 Standard Taps--High Speed Steel Spiral Point, Plug Style Tap Description Part Number 7/16 14 H2 3FL /16 14 H3 3FL /16 14 H5 3FL /16 20 H2 3FL /16 20 H3 3FL /16 20 H5 3FL /2 13 H1 3FL /2 13 H2 3FL /2 13 H3 3FL /2 13 H5 3FL /2 20 H1 3FL /2 20 H2 3FL /2 20 H3 3FL /2 20 H5 3FL /16 18 H3 3FL /8 11 H2 3FL /8 11 H3 3FL /8 11 H5 3FL /8 18 H3 3FL /4 10 H3 3FL /4 10 H5 3FL /8 9 H3 3FL H3 3FL

15 Standard Taps--High Speed Steel Spiral Point, Bottom Style Tap Description Part Number 0 80 H1 2FL H2 2FL H2 2FL H2 2FL H1 2FL H2 2FL H2 2FL H2 2FL H2 2FL H1 2FL H2 2FL H2 2FL H2 2FL H1 2FL H2 2FL H3 2FL H7 2FL H2 2FL H1 2FL H2 2FL H3 2FL H7 2FL H2 2FL H1 2FL H2 2FL H3 2FL H1 2FL H2 2FL H3 2FL H3 2FL /4 20 H3 2FL /4 28 H3 2FL /16 18 H3 2FL /16 24 H3 2FL /8 16 H3 3FL /8 24 H3 3FL /16 14 H3 3FL /16 20 H3 3FL /2 13 H3 3FL /2 20 H3 3FL

16 Standard Taps--High Speed Steel Spiral Point, Fluteless, GH3, Plug Fluteless spiral pointed taps are recommended for production tapping of through holes in thin sections not greater than one diameter in thickness. The fluteless spiral pointed tap was developed to produce a tap of maximum strength it has spiral points only; the tap body is threaded without flutes. This design of tap offers maximum rigidity required to minimize breakage caused by misalignment. These taps have proven very successful in the tapping of sheet metal. Tap Description Part Number 4 40 H H H H H H H /4 20 H /16 18 H3 2/sppt /16 18 H3 3/sppt /8 16 H /16 14 H /2 13 H Standard Taps--Spiral Point Extensions--6 Overall Length, H3, Plug Style High Speed Steel Tap Description Part Number 6 32 H3 2FL H3 2FL H3 2FL /4 20 H3 2FL /16 18 H3 2FL /8 16 H3 3FL

17 Standard Taps--High Speed Steel Pulley Taps Pulley taps, as the name implies, were originally designed for tapping oil and set screw holes in the hubs of pulleys which could not be reached with ordinary hand taps. Today, these taps are primarily used as an extension tap. The major and pitch diameters are the same as hand taps but feature longer shanks which are of the same major diameter as the threaded section. Tap Description EDP Number 1/4 20 H3 4FL 6"OAL /4 20 H3 4FL 8"OAL /16 18 H3 4FL 6"OAL /16 18 H3 4FL 8" OAL /8 16 H3 4FL 6" OAL /8 16 H3 4FL 8" OAL /8 16 H3 4FL 10" OAL /16 14 H3 4FL 6" OAL /16 14 H3 4FL 8" OAL /2 13 H3 4FL 6" OAL /2 13 H3 4FL 8" OAL /2 13 H3 4FL 10" OAL /2 13 H3 4FL 12" OAL /8 11 H3 4FL 6" OAL /8 11 H3 4FL 8" OAL /8 11 H3 4FL 10" OAL /8 11 H3 4FL 12" OAL /4 10 H3 4FL 10" OAL /4 10 H3 4FL 12" OAL Standard Taps--High Speed Steel Nut Taps Nut taps are generally used by nut manufacturers for production tapping on nut tapping machines. Their long small diameter shanks permit the tapped nuts to accumulate on the shank without reversing the tap. These taps are provided with long chamfers to distribute the cutting action efficiently for this type of operation. Tap Description EDP Number 1/4 20 H3 5" OAL /16 18 H3 5 1/2" OAL /8 16 H3 6" OAL /2 13 H3 7" OAL

18 Standard Taps--High Speed Steel Spiral Fluted, Fast (approx 50 degree) Spiral fluted taps are made with the flutes ground helically along the entire thread length with the same hand as the threads. Recommended for machine tapping deep blind holes, the cutting action forces the chips out of the hole similar to a drill. This cutting action minimizes friction and prevents chips from packing in the flutes at the bottom of the hole. Spiral fluted taps are also commonly used when tapping a hole that has an interrupted face as produced by a keyway or spline so that the helical lands of the tap will span or bridge the interruptions. Tap Description Plug Bottom 3 48 H2 2FL H2 2FL H2 2FL H1 2FL H2 2FL H3 2FL H2 3FL H3 3FL H1 3FL H3 3FL H1 3FL H2 3FL H3 3FL H3 3FL /4 20 H2 3FL /4 20 H3 3FL /4 20 H5 3FL /4 28 H3 3FL /4 28 H4 3FL /16 18 H2 3FL /16 18 H3 3FL /16 18 H5 3FL /16 24 H3 3FL /16 24 H4 3FL /8 16 H2 3FL /8 16 H3 3FL /8 16 H5 3FL /8 24 H1 3FL /8 24 H3 3FL /8 24 H4 3FL /16 14 H2 3FL /16 14 H3 3FL /16 14 H5 3FL /16 20 H3 3FL /16 20 H5 3FL /2 13 H2 3FL /2 13 H3 3FL /2 13 H5 3FL /2 20 H1 3FL /2 20 H3 3FL /2 20 H5 3FL /8 11 H3 4FL /4 10 H3 4FL

19 Standard Taps--High Speed Steel Spiral Fluted, Regular (approx 30 degree) Tap Description Plug Bottom 4 40 H2 2FL H2 2FL H3 2FL H3 2FL H3 2FL H3 2FL /4 20 H3 2FL /4 20 H3 3FL /4 28 H3 2FL /4 28 H3 3FL /16 18 H3 3FL /16 24 H3 3FL /8 16 H3 3FL /8 24 H3 3FL /16 14 H3 3FL /16 20 H3 3FL /2 13 H3 3FL /2 20 H3 3FL Standard Taps--High Speed Steel Metric Spiral Fluted Tap Description Plug Bottom M2.0 X 0.40 D3 2FL M2.5 X 0.45 D3 2FL M3.0 X 0.50 D3 2FL M3.5 X 0.60 D4 3FL M4.0 X 0.70 D4 3FL M5.0 X 0.80 D4 3FL M6.0 X 1.00 D5 3FL M7.0 X 1.00 D5 3FL M8.0 X 1.25 D5 3FL M10 X 1.50 D6 3FL M12 X 1.75 D6 3FL M14 X 2.00 D7 3FL M16 X 2.00 D7 3FL M18 X 2.50 D7 3FL

20 Standard Taps--Jarflos (forming taps), Bottoming Style Jarflo is the premier name in the expanding world of form tapping. It has been the vanguard of innovation for the past 40 years. Cold form tapping is an evolving technology. Jarflos provide consistently higher production rates, longer tool life and lower torque. That is why Jarflo has remained the leading name in cold form tapping. Tap Size H2 H3 H4 H5 H6 H7 H8 H9 H / / / / / / / / / / / / / / / /

21 Standard Taps--Jarflos (forming taps), Plug Style Tap Size H3 H4 H5 H6 H7 H8 H9 H / / / / / / / / / / / / / / / / Standard Taps--Metric Jarflos Tap Description Bottom Plug M2.0 X 0.40 D M2.5 X 0.45 D M3.0 X 0.50 D M3.5 X 0.60 D M4.0 X 0.70 D M5.0 X 0.80 D M6.0 X 1.00 D M8.0 X 1.25 D M10 X 1.50 D M12 X 1.75 D

22 Jarflo Nucon Drills Size for 65% to 75% thread Tap PD Drill Part Overall Flute Size Limits Diameter Number Length Length 2 56 H /2 7/ H /2 7/ H /2 7/ H /2 7/ H /2 7/ H /2 7/ H /2 7/ H /2 7/ H /2 7/ H /2 7/8 1/4 20 H /2 1 3/8 1/4 28 H /2 1 3/8 5/16 18 H /2 1 3/8 5/16 24 H /2 1 3/8 3/8 16 H /2 1 3/8 3/8 24 H /2 1 3/8 7/16 14 H /2 1 3/8 7/16 20 H /2 1 3/8 1/2 13 H /2 1 3/8 1/2 20 H /2 1 3/8 Metric Sizes M3 X 0.5 D /2 7/8 M3.5 X 0.6 D /2 7/8 M4 X 0.7 D /2 7/8 M5 X 0.8 D /2 1 3/8 M6 X 1.0 D /2 1 3/8 M7 X 1.0 D /2 1 3/8 M8 X 1.25 D /2 1 3/8 M10 X 1.5 D /2 1 3/8 M12 X 1.5 D /2 1 3/8 M12 X 1.75 D /2 1 3/8 Reasons for using Jarflo Nucons: Eliminates the need for center drilling. Special point geometry prevents the drill from walking Eliminates the need for reaming in many applications. The unique geometry prevents the drill from cutting oversized holes. These close tolerance drills are ideal for the critical demands of using Jarflos. Drill is specifically designed for ductile material. Aggressive flute for rapid chip removal. Off the shelf delivery available. Inventory is maintained for all sizes listed above. Other sizes available upon request. Highly specialized drill at standard drill pricing. 22

23 Standard Taps--Pipe Taps, Tapered Taper pipe taps are used principally for tapping pipe fittings to produce a tight threaded joint preventing the escape of a gas or liquid. These taps are thread ground on a taper at the rate of 3/4" per foot. Dryseal pipe taps are used to produce pressure tight joints for liquids and gases without the use of a sealing compound. They have the same general thread dimensions as the N.P.T. threads, but differ in the amount of truncation at the crest and root. The amount of truncation is designed to produce a metal to metal contact or interference at the crests and roots of the mating parts. When the joint is completely made up, the flanks and flats produce a leak proof assembly. Straight pipe taps are similar in design to taper pipe taps except for their straight thread. Straight pipe taps are used mainly for tapping low pressure fittings, electrical parts and locknuts. Tap Size NPT NPTF 1/ / / / / / / /4 11 1/ /2 11 1/ / Standard Taps--Pipe Taps, Tapered, Interrupted Tap Size NPT NPTF 1/ / / / / / /4 11 1/ /2 11 1/ /

24 Standard Taps--Pipe Taps, Tapered, Small Shank For many years pipe taps have been manufactured with standard stub shanks. These shanks in many instances make it difficult to correctly chuck these pipe taps in tapping attachments. To overcome this problem, Jarvis furnishes pipe taps with small shanks (hand tap shank dimensions) in various American Standard Pipe forms. Tap Size NPT NPTF 1/ / / / Standard Taps--Pipe Taps, Tapered Small Shank, Interrupted Tap Size NPT NPTF 1/ / / /

25 Standard Taps--Pipe Taps, Straight Tap Size NPS NPSF 1/ / / / / / Standard Taps--Pipe Taps, Straight, Small Shank Tap Size NPS NPSF 1/ / / /

26 Standard Taps--Screw Thread Insert (STI) Taps, Straight Flute STI (screw thread insert) taps are oversize so that the thread they produce will accept a helical wire screw thread insert fo the same size and pitch. Tap Description Plug Bottom 4 40 H1 3FL H2 3FL H1 3FL H2 3FL H2 3FL H3 3FL H1 3FL H2 3FL H2 3FL H3 3FL H2 3FL H3 3FL H2 3FL H3 3FL H2 3FL H3 3FL /4 20 H2 3FL /4 20 H3 3FL /4 28 H2 3FL /4 28 H3 3FL /16 18 H3 4FL /16 18 H4 4FL /16 24 H2 4FL /16 24 H4 4FL /8 16 H3 4FL /8 16 H4 4FL /8 24 H2 4FL /8 24 H3 4FL /16 14 H3 4FL /16 14 H4 4FL /16 20 H3 4FL /16 20 H4 4FL /2 13 H3 4FL /2 13 H4 4FL /2 20 H3 4FL /2 20 H4 4FL

27 Standard Taps--Screw Thread Insert (STI) Taps, Spiral Point Tap Description Plug 4 40 H1 2FL H2 2FL H1 2FL H2 2FL H2 2FL H3 2FL H1 2FL H2 2FL H2 2FL H3 2FL H2 2FL H3 2FL H2 2FL H3 2FL H2 2FL H3 2FL /4 20 H2 2FL /4 20 H3 2FL /4 28 H2 2FL /4 28 H3 2FL /16 18 H3 3FL /16 18 H4 3FL /16 24 H2 3FL /16 24 H3 3FL /8 16 H3 3FL /8 16 H4 3FL /8 24 H2 3FL /8 24 H3 3FL

28 Special Taps-Stub Jarflos for in-die tapping Tap Size Jarvis Part Number Tap Size Jarvis Part Number 2-56 H H H5 (2B) H H H H5 (2B) H H H5 (2B) H H H H6 (2B) H H H H /4-20 H /4-28 H /16-18 H M2 X 0.4 D M2.5 X 0.45 D M3 X 0.5 D M3 X 0.5 D5 (6H) M3 X 0.5 D M3.5 X 0.6 D6 (6H) M3.5 X 0.6 D M4 X 0.7 D M4 X 0.7 D M4 X 0.7 D6 (6H) M5 X 0.8 D M6 X 1.0 D M8 X 1.25 D

29 Special Taps J80 s Tap Size Semi Bottom Bottom 1/4 20 NC H5 4FL /4 20 NC H3 3FL /4 28 NF H4 4FL /4 28 NF H3 3FL /16 18 NC H5 4FL /16 18 NC H3 3FL /16 24 NF H4 4FL /16 24 NF H3 3FL /8 16 NC H5 4FL /8 16 NC H3 3FL /8 24 NF H4 4FL /8 24 NF H3 3FL /16 14 NC H5 4FL /16 20 NF H3 4FL /2 13 NC H5 4FL /2 20 NF H3 4FL /16 12 NC H5 4FL /16 18 NF H3 4FL /8 11 NC H5 4FL /8 18 NF H4 4FL /4 10 NC H5 4FL /4 16 NF H4 4FL

30 Special Taps--Left Hand--Plug, Bottom and Taper Tap Size Flutes Plug Bottom Taper 6-32 H H H H /4-20 H /4-28 H /16-18 H /16-24 H /8-16 H /8-24 H /16-14 H /16-20 H /2-13 H /2-20 H /16-12 H /16-18 H /8-11 H /18 18 H /4-10 H /4-16 H /8-9 H /8-14 H H H H Special Taps--National Extra Fine (NEF)--Plug, Bottom and Taper Tap Size Flutes Plug Bottom Taper H /4-32 H /16-32 H /8-32 H /16-28 H /2-28 H /16-24 H /8-24 H /16-24 H /4-20 H /16-20 H /8-20 H /16-20 H H

31 Special Taps Oversize Straight Flute--Plug, Bottom, Taper Tap Size Flutes Plug Bottom Taper / / / / / / / / / / / / / / / / Special Taps Oversize Spiral Point--Plug Tap Size Flutes Plug / / / / / / / / / / / /

32 Special Taps--Combination Drill and Tap Tap Part Overall Thread Drill Size Number Length Length Length /8 9/16 1/ /16 5/ /8 3/4 3/ /8 7/8 13/ /8 7/8 13/ /8 7/8 15/ /8 7/8 15/32 1/ /2 15/16 17/32 1/ /2 15/16 17/32 5/ /8 11/16 5/ /8 11/16 3/ /2 1 1/4 13/16 3/ /2 1 1/4 13/16 7/ /8 1 7/16 1 7/ /8 1 7/16 1 1/ /4 1 21/32 1 1/8 1/ /4 1 21/32 1 1/8 Metrics M3 X /16 3/4 5/16 M4 X /8 3/4 3/8 M5 X /8 7/8 13/32 M6 X /2 15/16 17/32 M8 X /8 11/16 M10 X /2 3 1/2 1 1/4 M12 X /4 1 21/32 1 1/8 32