A fastener, abbreviated as FSTNR, is hardware that mechanically joins two or more objects together.


  • FSTNR - fastener
  • ANPT - American National Taper Pipe
  • ANPT - Aeronautical National Pipe Taper
  • ANS - American National Standard replaced with UNS
  • BA - British Association
  • BSF - British Standard Fine
  • BSP - British Standard Pipe
  • BSW - British Standard Whitworth
  • ISO - International Organization for Standardization
  • NPT - National Pipe Thread Tapered Thread
  • NPTF - National Pipe Taper Fuel - Dryseal
  • UNS - Unified National Standard
  • USS - United States Standard
  • UTS - Unified Thread Standard


Types of fasteners

  • Removable - these parts can be disconnected without damaging the fastener like nut and bolt.
  • Semi-permanent - these parts can be disconnected, but some damage can occurs to the fastener like a cotter pin.
  • Permanent - these parts will never be disassembled like rivets and welding.


fastener standards

ASME Standards

  • ASME B1.20.1 - Pipe Threads, General Purpose, Inch
  • ASME B1.20.3 - Dryseal Pipe Threads, Inch
Display #
Aerotight Nut
Anchor Bolt
Angle Controlled Tightening
Anti-friction Coating
Anti-seize Compound
Autolock Nut
Band Hanger
Basic Thread Profile
Beam Clamp
Black Bolts and Nuts
Bolt Grip Length
Bolt Identification Marking
Bolt Inch to Metric
Bolt Nominal Length
Bolt Stud
Bolt Torque
Bolt Wrench Size (in)
Bolt Wrench Size (mm)
British Standard Fine
Bump Thread
Center Beam Clamp
Clevis Hanger