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
Compression Spring
Compression Strength
Decompression Point
Direct Tension Indicator
Extension Spring
External Thread
General Information about Fasteners
Hooke's Law
Internal Thread
Leaf Spring Stiffness
Lefthand Thread
Moment Arm
National Pipe Thread
Nut Runner
Spring Diameter
Spring Displacement
Spring Energy
Spring Index
Spring Load
Spring Mean Coil Diameter
Spring Number of Active Coils
Spring Pitch
Spring Potential Energy
Spring Rate
Spring Solid Coil Height
Spring Tension
Spring Travel length
Spring Wire Diameter
Spring Wire Length
Spring Wire Stress
Thread Pitch
Torsion Spring
Wahl Correction Factor