🔩 Flange Bolt Length
ASME B16.5
Calculator
⭐ Accurate calculation of bolt length required for flanges
🔩 Pipe Size (NPS)
½
¾
1
1¼
1½
2
2½
3
4
5
6
8
10
12
14
16
18
20
24
📐 Flange Class
Class 150
Class 300
Class 600
Class 900
Class 1500
Class 2500
📏 Flange Type
Weld Neck (WN)
Slip On (SO)
Blind (BL)
Threaded (TH)
Lap Joint (LJ)
🧊 Gasket Thickness (mm)
1.5 mm
3.0 mm
4.5 mm
6.0 mm
📐 Bolt Thread Type
Coarse (UNC)
Fine (UNF)
➕ Extra Length (mm)
For nut and washer allowance
🧮 Calculate Bolt
🔄 Reset
📋 Copy
📄 PDF
🔩
Bolt Length = ?
Total bolt length including head, nut, and thread
0.00
mm
📏 Effective Bolt Length:
-
mm
🔧 Thread Length:
-
mm
📐 Final Length:
-
mm