20-057-4-81D

Bolt

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Description:

Fastener Length: 5-1/2", Thread: 1/4-28, Thread Length: 7/16"

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20-057-4-81D Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.400 inches minimum and 0.450 inches maximum
Fastener Length:
5.472 inches minimum and 5.502 inches maximum
Head Style:
Hexagon
Head Height:
0.125 inches minimum and 0.140 inches maximum
Width Between Flats:
0.430 inches minimum and 0.439 inches maximum
Grip Diameter:
0.2485 inches minimum and 0.2495 inches maximum
Shank Unthreaded Hole Diameter:
0.076 inches minimum first hole and 0.086 inches maximum first hole
Thread Diameter:
0.250 inches
Grip Length:
5.052 inches minimum and 5.072 inches maximum
Thready Qty Per Inch (tpi):
28
Min. Tensile Strength (psi):
160000 pounds per square inch
Hardness Rating:
36.0 rockwell c minimum overall and 40.0 rockwell c maximum overall
Distance From Head Largest Bearing Surface To Shank Hole Center:
5.284 inches minimum first hole and 5.334 inches maximum first hole
Material:
Steel comp e4340 overall or steel comp 4340 overall or steel comp 4140 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 6150 overall
Surface Treatment:
Cadmium overall and chromate overall
Surface Treatment Specification:
Qq-p-416,ty 2,cl 2 fed spec all treatment responses overall
Thread Series Designator:
Unjf
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Steel
Length 5-1/2

Additional Information

SKU / Model: 20057481D
NSN: 5306-01-028-4833
FSC: Bolts / 5306
Product Series: 20
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 1 EA
Schedule B: 7318.15.8085
ECCN: EAR99
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
20-057-4-81D_Military-Fasteners-com.pdf
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