General Information about Fasteners

A fastener is hardware that mechanically joins two or more objects together.  Looking for fastener datasheets?

Abbreviations

• FSTNR - Fastener
• ANTP - 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

Fastener Types

• 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.

Standards

• ASME Standards
  • ASME B1.20.1 - Pipe Threads, General Purpose, Inch
  • ASME B1.20.3 - Dryseal Pipe Threads, Inch