NAS1578A4T20

Bolt

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Description:

Fastener Length: 1-21/32", Thread: 1/4-28, Thread Length: 27/64"

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NAS1578A4T20 Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.378 inches minimum and 0.428 inches maximum
Fastener Length:
1.638 inches minimum and 1.668 inches maximum
Head Style:
Pan no. 2
Head Diameter:
0.472 inches minimum and 0.492 inches maximum
Head Height:
0.140 inches minimum and 0.150 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:
1.240 inches minimum and 1.260 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
Surface Finish:
32.0 microinches bearing surface of head
Surface Finish:
32.0 microinches grip
Surface Finish:
32.0 microinches threads
Material:
Steel comp e4340 overall or steel comp 4140 overall or steel comp 8740 overall or steel comp 8735 overall or steel comp 6150 overall
Surface Treatment:
Cadmium overall and chromate overall
Surface Treatment Specification:
Qq-p-416 ty2 cl2 fed spec single treatment response overall
Thread Series Designator:
Unjf
Specification Data:
80205-nas1578 professional/industrial association standard
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Steel
Length 1-21/32

Additional Information

SKU / Model: NAS1578A4T20
NSN: 5305-01-056-0165
FSC: Screws / 5305
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 5 EA
Schedule B: 7318.15.2010
ECCN: 9A991
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
NAS1578A4T20_Military-Fasteners-com.pdf
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NAS1578A5R31

Fastener Length: 2-29/64in., Thread: 1/4-24, Thread Length: 1/2in.

NAS1578A4T7

$5.10 EA, Fastener Length: 27/32in., Thread: 1/4-28, Thread Length: 27/64in.

NAS1578A4T4

$3.30 EA, Fastener Length: 21/32in., Thread: 1/4-28, Thread Length: 27/64in.

NAS1578A4T3

Fastener Length: 19/32", Thread: 1/4-28, Thread Length: 15/32"

NAS1578A4T22

Fastener Length: 1-25/32", Thread: 1/4-28, Thread Length: 3/8"

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I placed this order late at 4:15 over the phone, 15 minutes past the cut off time.(Which rarely happens) It was critical for us to get the sparkplugs as a customer had called me and scheduled to bring his plane in the next day to have all his plugs replaced. My sales agent said she would personally go and pull the product so it would ship that day, and she did what she said. She saved me the embarrassment of telling my customer I forgot to order his parts on time and making him reschedule a maintenance visit. I am thankful you have people like her who really care about the customer and want to put in the extra effort for customer service. In my aircraft maintenance business I purchase everything I can first from Military Fasteners before I go looking for other venders. I use Military Fasteners because of the great customer service, free shipping (which is one day ground), large selection on hardware and materials, and competitive prices. I am a loyal customer and I order 2-3+ times a week. Thank you for the great service that your people provide at Military Fasteners.

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I have built an airplane with parts from Military Fasteners. In the last years I have only had one issue involving warranty problems and that was resolved by the factory. Good service and quality parts/availability are very good at Military Fasteners.

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