# Dormer E6531/4 5978395 1/4" x 18 NPT Spiral Flute Machine Tap, HSS, ANSI - MROSupply.com

***Dormer E6531/4 5978395 NPT spiral flute machine tap, 1/4" x 18 thread, 27° spiral flute angle, HSS, ANSI standard. Designed for threading steel and cast steel (P material group). 27 flutes, 1.1/16" overall length, 3.5/16" connection diameter, 0.562" clamping width.***



## Product details:

- Catalog number: 5978395
- SKU: 6082078
- Price: ***$71.09*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Dormer Pramet](https://www.mrosupply.com/brands/dormer-pramet/)
- Category: 
    - [Taps](htts://www.mrosupply.com/cutting-tools/thread-forming/taps/)
    - [Thread Forming](htts://www.mrosupply.com/cutting-tools/thread-forming/)
    - [Cutting Tools](htts://www.mrosupply.com/cutting-tools/)
- Unit of measure: each
- Weight: 0.150 lb
- Returns: Yes


## Product images:
- https://static.mrosupply.com/images/noimage.webp


## Product attributes;

  
- Basic Standard: ANSI
  

  
- Clamping width - fractional inch (WSC): 0.562
  

  
- Clamping width - inch: 0.421
  

  
- Coating: Bright
  

  
- Coating property (CTP): 2
  

  
- Connection diameter - inch (DCON MS): 3.5/16
  

  
- Connection diameter - millimeter (DCON MS): 14.27
  

  
- EDP number: 297278
  

  
- Flute count (NOF): 27
  

  
- Flute Geometry (FDC): Spiral Flute Geometry
  

  
- Flute helix angle (FHA): 27
  

  
- Hand (Cutting direction): Right
  

  
- Material: HSS
  

  
- Material application: P - Steel and cast steel
  

  
- MID number: 5978395
  

  
- Ordering code ANSI: E6531/4
  

  
- Overall length - fractional inch (OAL): 3.5/16
  

  
- Overall length - inch (OAL): 3.3125
  

  
- Overall length - millimeter (OAL): 1.1/16
  

  
- Shank: Cylindrical shank with Square
  

  
- Thread diameter - millimeter (TD): 0.4331
  

  
- Thread diameter size (TDZ): 1/4
  

  
- Thread form (THFT): NPT - National taper pipe
  

  
- Threads per inch (TPI): 18
  

  
- Usable length (ULDR): 1.5
  

  
- Usable Length - fractional inch (LU): 1.1/16
  
## Product documents / software:

- [Catalog](https://documents.mrosupply.com/product_documents/60/82/6082114/PTD_UB_DORMER_EN_dmlMB1R.pdf)
- [Line Drawing](https://documents.mrosupply.com/product_documents/60/82/6082076/E653_DIM.png)

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