Full Hex Nut 2.1/2 x 4 BSW Black SAE 5
Full Nut
Hexagon
Imperial BSW
High Tensile SAE 5
Dia: 2.1/2'
TPI: 4
Wrench Size Across Flats: 3.7/8'
A BSW SAE Grade 5 hex nut refers to a high-tensile imperial fastener that combines the British Standard Whitworth (BSW) thread form with the SAE Grade 5 strength classification.