• Download PDF
    Standard
  •   0091-22-66157017
  •   info@torqbolt.com
    • Home
    2. ASTM A453 Grade 660 Class D
    3. API 6A Tap End Stud Bolt

    ASTM A453 Grade 660 Class D API 6A Tap End Stud Bolt

    For products monogrammed per API 6A 21st Edition, all closure bolting shall be qualified and manufactured in accordance with API 20F (Corrosion-Resistant Bolting Requirements).

    API 6A Tap End Stud Bolt Length for 6B Flange Connectors with "R" & "RX" Gaskets

    API 6A Tap End Stud Bolt Length for 6B Flange Connectors with R & RX Gaskets
    Flange Size Size and Pressure Bolt and Thread Tap End Length* Nut End Length Length**
    2 1/16 2000 5/8 - 11 UNC 0.761 1.563 3.625
    2 1/16 3000 7/8 - 9 UNC 1.042 2.188 4.625
    2 1/16 5000 7/8 - 9 UNC 1.042 2.188 4.625
    2 9/16 2000 3/4 - 10 UNC 0.900 1.875 4.000
    2 9/16 3000 1 - 8 UNC 1.188 2.500 5.125
    2 9/16 5000 1 - 8 UNC 1.188 2.500 5.125
    3 1/8 2000 3/4 - 10 UNC 0.900 1.875 4.1 25
    3 1/8 3000 7/8 - 9 UNC 1.042 2.188 4.625
    3 1/8 5000 1 1/8 - 8 UN 1.313 2.813 5.625
    4 1/16 2000 7/8 - 9 UNC 1.042 2.188 4.625
    4 1/16 3000 1 1/8 - 8 UN 1.313 2.813 5.500
    4 1/16 5000 1 1/4 - 8 UN 1.438 3.1 25 6.125
    5 1/8 2000 1 - 8 UNC 1.188 2.500 5.250
    5 1/8 3000 1 1/4 - 8 UN 1.438 3.1 25 6.000
    5 1/8 5000 1 1/2 - 8 UN 1.688 3.750 7.375
    7 1/16 2000 1 - 8 UNC 1.188 2.500 5.375
    7 1/16 3000 1 1/8 - 8 UN 1.313 2.813 5.875
    7 1/16 5000 1 3/8 - 8 UN 1.563 3.438 7.500
    9 2000 1 1/8 - 8 UN 1.313 2.813 5.875
    9 3000 1 3/8 - 8 UN 1.563 3.438 6.750
    9 5000 1 5/8 - 8 UN 1.813 4.063 8.500
    11 2000 1 1/4 - 8 UN 1.438 3.1 25 6.500
    11 3000 1 3/8 - 8 UN 1.563 3.438 7.000
    11 5000 1 7/8 - 8 UN 2.063 4.688 9.625
    13 5/8 2000 1 1/4 - 8 UN 1.438 3.1 25 6.625
    13 5/8 3000 1 3/8 - 8 UN 1.563 3.438 7.375
    16 3/4 2000 1 1/2 - 8 UN 1.688 3.750 7.500
    16 3/4 3000 1 5/8 - 8 UN 1.813 4.063 8.375
    21 1/4 2000 1 5/8 - 8 UN 1.813 4.063 8.375
    20 3/4 3000 2-8 UN 2.188 5.000 10.125
    • FOOTNOTES* Tolerance on tap end thread length: + 0.063/− 0 in.** Tolerance on t ap end stud length: + 0.1 25/− 0 in.

    API 6A Tap End Stud Bolt Length for 6BX Studded Flange Connectors

    API 6A Tap End Stud Bolt Length for 6BX Studded Flange Connectors
    Flange Size and Pressure Bolt Size and Thread Tap End Length * Nut End Length Length ** Flange Size and Pressure Bolt Size and Thread Tap End Length * Nut End Length Length **
    1 13/16 10,000 3/4- 10 UNC 0.900 1.875 3.750 11 10,000 13/4- 8 UN 1.938 4.375 9.750
    1 13/16 15,000 7/8 - 9 UNC 1.042 2.188 4.1 25 11 15,000 2-8 UN 2.188 5.000 12.000
    1 13/16 20,000 1 - 8 UNC 1.188 2.500 5.125 11 20,000 23/4- 8 UN 2.938 6.875 15.000
    2 1/16 10,000 3/4- 10 UNC 0.900 1.875 3.875 13 5/8 5000 1 5/8 - 8 UN 1.813 4.063 8.375
    2 1/16 15,000 7/8 - 9 UNC 1.042 2.188 4.375 13 5/8 10,000 1 7/8 - 8 UN 2.063 4.688 11.000
    2 1/16 20,000 1 1/8 - 8 UN 1.313 2.813 5.750 13 5/8 15,000 2 1/4 - 8 UN 2.438 5.625 13.250
    2 9/16 10,000 7/8 - 9 UNC 1.042 2.188 4.375 13 5/8 20,000 3-8 UN 3.188 7.500 18.1 25
    2 9/16 15,000 1 - 8 UNC 1.188 2.500 4.875 16 3/4 5000 1 7/8 - 8 UN 2.063 4.688 9.500
    2 9/16 20,000 1 1/4 - 8 UN 1.438 3.1 25 6.250 16 3/4 10,000 1 7/8 - 8 UN 2.063 4.688 11.000
    3 1/16 10,000 1 - 8 UNC 1.188 2.500 5.000 18 3/4 5000 2-8 UN 2.188 5.000 11.250
    3 1/16 15,000 1 1/8 - 8 UN 1.313 2.813 5.500 18 3/4 10,000 2 1/4 - 8 UN 2.438 5.625 14.000
    3 1/16 20,000 13/8- 8 UN 1.563 3.438 6.750 18 3/4 15,000 3-8 UN 3.188 7.500 16.750
    4 1/16 10,000 1 1/8 - 8 UN 1.313 2.813 5.750 21 1/4 5000 2-8 UN 2.188 5.000 11.750
    4 1/16 15,000 13/8- 8 UN 1.563 3.438 6.500 21 1/4 10,000 2 1/2- 8 UN 2.688 6.250 15.125
    4 1/16 20,000 13/4- 8 UN 1.938 4.375 8.375 263/4 2000 13/4- 8 UN 1.938 4.375 9.125
    5 1/8 10,000 1 1/8 - 8 UN 1.313 2.813 6.000 263/4 3000 2-8 UN 2.188 5.000 11.000
    5 1/8 15,000 1 1/2- 8 UN 1.688 3.750 7.625 30 2000 1 5/8 - 8 UN 1.813 4.063 9.250
    7 1/16 10,000 1 1/2- 8 UN 1.688 3.750 7.750 30 3000 1 7/8 - 8 UN 2.063 4.688 11.000
    7 1/16 15,000 1 1/2- 8 UN 1.688 3.750 8.375 - - - - - -
    7 1/16 20,000 2-8 UN 2.188 5.000 11.125 - - - - - -
    9 10,000 1 1/2- 8 UN 1.688 3.750 8.500 - - - - - -
    9 15,000 1 7/8 - 8 UN 2.063 4.688 10.1 25 - - - - - -
    9 20,000 2 1/2- 8 UN 2.688 6.250 13.750 - - - - - -
      FOOTNOTES* Tolerance on bolt length: +0.1 25/−0 in. for lengths up to 1 2 in. +0.250/ − 0 in. for lengths over 1 2 in.

    API 6A Tap End Stud Bolt Length for 6B Flange Connectors with "R" Gaskets UNSC Series

    API 6A Tap End Stud Bolt Length for 6B Flange Connectors with R Gaskets UNSC Series
    Flange Size and Pressure Bolt Size and Thread Tap End Length* Nut End Length Length** Flange Size and Pressure Bolt Size and Thread Tap End Length* Nut End Length Length**
    2 1/16 2000 5/8 - 11 UNC 0.761 1.563 3.375 7 1/16 2000 1 - 8 UNC 1.188 2.500 5.000
    21/16 3000 7/8 - 9 UNC 1.042 2.188 4.375 7 1/16 3000 1 1/8 - 8 UN 1.313 2.813 5.625
    2 1/16 5000 7/8 - 9 UNC 1.042 2.188 4.375 7 1/16 5000 1 3/8 - 8 UN 1.563 3.438 7.250
    2 9/16 2000 3/4- 10 UNC 0.900 1.875 3.750 9 2000 1 1/8 - 8 UN 1.313 2.813 5.625
    2 9/16 3000 1 - 8 UNC 1.188 2.500 4.750 9 3000 1 3/8 - 8 UN 1.563 3.438 6.375
    2 9/16 5000 1 - 8 UNC 1.188 2.500 4.750 9 5000 1 5/8 - 8 UN 1.813 4.063 8.1 25
    3 1/8 2000 3/4- 10 UNC 0.900 1.875 3.875 11 2000 1 1/4 - 8 UN 1.438 3.1 25 6.125
    3 1/8 3000 7/8 - 9 UNC 1.042 2.188 4.375 11 3000 1 3/8 - 8 UN 1.563 3.438 6.625
    3 1/8 5000 1 1/8 - 8 UN 1.313 2.813 5.250 11 5000 1 7/8 - 8 UN 2.063 4.688 9.250
    4 1/16 2000 7/8 - 9 UNC 1.042 2.188 4.375 13 5/8 2000 1 1/4 - 8 UN 1.438 3.1 25 6.250
    41/16 3000 1 1/8 - 8 UN 1.313 2.813 5.125 13 5/8 3000 1 3/8 - 8 UN 1.563 3.438 7.000
    4 1/16 5000 1 1/4 - 8 UN 1.438 3.1 25 5.750 16 3/4 2000 1 1/2 - 8 UN 1.688 3.750 7.1 25
    51/8 2000 1 - 8 UNC 1.188 2.500 4.875 16 3/4 3000 1 5/8 - 8 UN 1.813 4.063 8.000
    5 1/8 3000 1 1/4 - 8 UN 1.438 3.1 25 5.625 21 1/4 2000 1 5/8 - 8 UN 1.813 4.063 8.000
    5 1/8 5000 1 1/2- 8 UN 1.688 3.750 7.000 203/4 3000 2-8 UN 2.188 5.000 9.625
    • FOOTNOTES* Tolerance on tap end thread length: +0.063/− 0 in.** Tolerance on tap end stud length; +0.1 25/− 0 in.
    Specifications
    • ASTM A453
    • ASTM A638
    • EN 10269
    • EN 10083-3
    • ISO 3506-5
    • DIN 267
    Surface Treatments
    • Xylan 1070 / 1014 / 1400 / 1424
    • Xylar 2 / 101
    • SermaGard 1105 / 1280
    • Dacromet 320 / 500
    • TakeCoat 1000 Ceramic
    • Magnigard
    • MolyKote
    Certifications
    • ISO 9001 - 2015 Certified
    • PED 2014/68/EC
    • NACE MR0175/ISO 15156-2
    • NORSOK M-650
    • DFAR
    • MERKBLATT AD 2000 W2/W7/W10
    About Us
    Questions? Contact us.
    Showcase of our Microsites.
    Satisfaction Survey

    survey

    TUVRheinland CRETIFIED

    © 2024 TorqBolt P(Ltd) · Built with in INDIA.