NAS1581F5R21

Bolt

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Description:

Fastener Length: 1-53/64", Thread: 1/4-24, Thread Length: 33/64"

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NAS1581F5R21 Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.476 inches minimum and 0.526 inches maximum
Fastener Length:
1.798 inches minimum and 1.828 inches maximum
Head Style:
Flat countersunk
Head Diameter:
0.429 inches minimum and 0.479 inches maximum
Grip Diameter:
0.3110 inches minimum and 0.3120 inches maximum
Internal Drive Style:
Offset cruciform (torque set)
Thread Diameter:
0.312 inches
Grip Length:
1.302 inches minimum and 1.322 inches maximum
Thready Qty Per Inch (tpi):
24
Min. Tensile Strength (psi):
160000 pounds per square inch
Hardness Rating:
36.0 rockwell c minimum and 40.0 rockwell c maximum overall
Countersink Angle:
99.0 degrees minimum and 101.0 degrees maximum
Surface Finish:
32.0 microinches grip
Surface Finish:
32.0 microinches threads
Special Features:
Internal drive ribbed
Material:
Steel comp 4140 or steel comp e4340 or steel comp 8740 overall
Material Specification:
Mil-s-5626 mil spec 1st material response or mil-s-5000 mil spec 2nd material response or mil-s-6049 mil spec 3rd material response overall
Surface Treatment:
Cadmium and chromate overall
Surface Treatment Specification:
Qq-p-416,type 2 class 2 fed spec single treatment response overall
Thread Series Designator:
Unjf
Specification Data:
80205-nas1581 professional/industrial association standard
Quick Specs
Thread Size 1/4
Thread Qty 24
Material Steel
Length 1-53/64

Additional Information

SKU / Model: NAS1581F5R21
NSN: 5305-01-228-0561
FSC: Screws / 5305
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 10 EA
Schedule B: 7318.15.8085
ECCN: 9A991
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
NAS1581F5R21_Military-Fasteners-com.pdf
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