We are your tap and die specialist.

We have a huge assortment of standard and special sizes including inch, metric and british sizes.

Did you know you can order special size taps manufactured in 24 hours?

 

How to order special taps

taps

 

Questions to ask

1 .Size ( outside diameter ) and pitch,
             Thread Form ( Inch, Metric, British, Pipe, Acme, Trapezoidal, etc)
2. Style ( taper, plug, bottoming, spiral pointed, spiral fluted)
             if unknown we quote the plug style

more info for specials

3. Right Hand ( standard ) or Left Hand
4. Single lead ( standard) or double, triple, or quad lead
5. Thru or blind hole
6  Depth of thread.
7. Material being tapped


Questions for Inch or American size taps

1.Size ( outside diameter ) and pitch,

UN, unified

  • UNC or NC is national coarse,
  • UNF or NF is national fine,
  • UNEF or NEF is national extra fine,
  • all others are UNS or NS national specials

2. Style ( taper, plug, bottoming, spiral pointed, spiral fluted)
           


3. Right Hand (this is standard) or Left Hand


 

Questions for ordering Acme taps

1. Diameter and Pitch ( thread per inch)

2. Through or blind hole

3. Length of Thread

4. Material being threaded

additional information

5. Right Hand ( this is standard) or Left hand

6. Single lead ( standard ) , double lead, triple lead, quad lead

7. Special class of fit


 

Questions for Trapezoidal tap ( metric acme taps)

1. Diameter and Pitch

2. Through or blind hole

3. Length of Thread

4. Material being threaded

additional information

5. Right Hand ( this is standard) or Left hand

6. Single lead ( standard ) , double lead, triple lead, quad lead

7. special class of fit


Questions for British taps

1.size ( outside diameter ) and pitch,

  • BSW ( British standard whitworth coarse thread)

  • BSF ( British standard whitworth fine thread)

  • pipe


2 style ( taper, plug, bottoming, spiral pointed, spiral fluted)
3. Right Hand (standard) or Left Hand


 

Questions for Pipe taps

1.size and pitch, ( the size of pipe taps is not the outside diameter, pipe sizes are named for the inside diameter of pipe )

2. Thread Form: Inch, ( American, 60 degree )
  • NPT, national pipe tapered thread
  • NPS, national pipe straight thread, ( parallel thread)

or British ( whitworth form, 55 degree)
  • BSP (BSP, BSPP, BSSPI, BSPF, BSPG, PS, R, G.), British standard pipe parallel thread (straight thread)
    BSPT ( BSPT, BSPTr, PT, KR, Rc ) British standard pipe tapered thread

3 Style. The standard style is bottoming ( taper, plug, bottoming, spiral pointed, spiral fluted)

4. Right Hand ( standard is RH ) or Left Hand

 


link to tap and die index page

link to pitch conversion inch to metric

link to special taps dimensions page

link to tap guide

 

 

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