Part Number: 20-057-12-48DD

Description: Shear Bolt for Bell 171 NSN 5306-01-372-6442.

Properties

Thread Class:

Thread Direction:

Right-hand

Thread Length:

0.252 inches

Fastener Length:

0.250 inches

Head Style:

Hexagon

Head Height:

0.375 inches

Width Between Flats:

1.058 inches

Grip Diameter:

0.759 inches

End Application:

Aircraft model ah-1w

Thread Diameter:

0.749 inches

Grip Length:

1.093 inches

Thready Qty Per Inch (tpi):

Part Name Assigned By Controlling Agency:

Navy special project

Special Features:

160, 000-180, 000 psi ultimate tensile strength per mil-h-6875 rockwell hardness: c36-c40; shank is cross-drilled

Material:

Steel

Material Specification:

Mil-b-7838 military specification single material response

Surface Treatment:

Cadmium

Surface Treatment Specification:

Qq-p-416, type ii, class 2 federal specification single treatment response

Thread Series Designator:

Unjf

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