NAS1581F4R2

Close Tolerance Bolt

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Description:

Fastener Length: 17/32", Thread: 1/4-28, Thread Length: 27/64

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NAS1581F4R2 Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.378 inches minimum and 0.428 inches maximum
Fastener Length:
0.513 inches minimum and 0.543 inches maximum
Head Style:
Flat countersunk
Head Diameter:
0.3504 inches minimum and 0.3988 inches maximum
Grip Diameter:
0.2485 inches minimum and 0.2495 inches maximum
Internal Drive Style:
Offset cruciform (torque set)
Thread Diameter:
0.250 inches
Grip Length:
0.115 inches minimum and 0.135 inches maximum
Thready Qty Per Inch (tpi):
28
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 bearing surface of head
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 28
Material Steel
Length 17/32

Additional Information

SKU / Model: NAS1581F4R2
NSN: 5305-01-231-7425
FSC: Screws / 5305
Product Series: NAS1581F4R
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 50
Schedule B: 7318.15.8085
ECCN: EAR99
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
NAS1581F4R2_Military-Fasteners-com.pdf
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More NAS1581F4R close tolerance bolts

NAS1581F4R9

Fastener Length: 1-3/8", Thread: 1/4-28, Thread Length: 49/64"

NAS1581F4R8

Fastener Length: 29/32", Thread: 1/4-28, Thread Length: 27/64"

NAS1581F4R7

$2.70 EA, Fastener Length: 27/32in., Thread: 1/4-28, Thread Length: 15/32in.

NAS1581F4R6

Fastener Length: 25/32", Thread: 1/4-28, Thread Length: 27/64"

NAS1581F4R5

Fastener Length: 23/32", Thread: 1/4-28, Thread Length: 13/32"

NAS1581F4R4

Fastener Length: 21/32", Thread: 1/4-28, Thread Length: 3/8"

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Recently my avionics technician and I were installing a component in my aircraft and there were some critical fasteners missing from the manufactures package. This stopped the entire process. I called Military Fasteners after finding the parts on line, and Trisha answered the phone. I told her the situation and that I needed them ASAP. I found the parts gave her the part number and she confirmed they were in stock. This was about 430 in the afternoon just before closing. Trisha was kind and professional got the parts out the door that evening even though it was after the shipping cut off. Saved the day. I can tell you this entire company is represented by Trisha, anything they can do to help you out of a jamb they will absolutely go the extra mile and Trisha is the go to person. I am sure there are others there with her same attitude and professionalism. This is a great resource for all your fasteners needs.

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