NAS428HK4A6

Bolt

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Description:

Fastener Length: 13/16", Hole Diameter: 1/32", Thread: 1/4-28, Thread Length: 25/32"

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NAS428HK4A6 Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.678 inches minimum and 0.781 inches maximum
Fastener Length:
0.750 inches minimum and 0.812 inches maximum
Head Style:
Crowned hexagon
Head Height:
0.131 inches minimum and 0.151 inches maximum
Width Between Flats:
0.428 inches minimum and 0.440 inches maximum
Hole Diameter:
0.035 inches nominal
Thread Diameter:
0.250 inches
Grip Length:
0.031 inches minimum and 0.062 inches maximum
Hole Quantity:
1
Hole Type:
Drilled
Features Provided:
Finished head
Thready Qty Per Inch (tpi):
28
Min. Tensile Strength (psi):
125000 pounds per square inch
Hardness Rating:
26.0 rockwell c minimum overall and 32.0 rockwell c maximum overall
Hole Configuration Style:
Hexagon longitudinal hole
Special Features:
Slot in @thread end
Material:
Steel comp 8740 overall or steel comp 4140 overall or steel comp 8735 overall or steel comp 4037 overall or steel comp 4130 overall
Surface Treatment:
Cadmium overall and chromate overall
Surface Treatment Specification:
Qq-p-416,type 2,class 2 fed spec single treatment response overall
Thread Series Designator:
Unf
Specification Data:
80205-nas428 professional/industrial association standard
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Steel
Length 13/16

Additional Information

SKU / Model: NAS428HK4A6
NSN: 5306-01-042-4389
FSC: Bolts / 5306
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 1 EA
Schedule B: 7318.15.8085
ECCN: EAR99
National Motor Freight: 093460, Bolts / Nuts Noi Bbc / Zinc
Download PDF Version
NAS428HK4A6_Military-Fasteners-com.pdf
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More machine bolts

NAS428HK4A5

Fastener Length: 5/8", Hole Diameter: 1/32", Thread: 1/4-28, Thread Length: 19/32"

NAS428HK4A20

Fastener Length: 2-", Hole Diameter: 1/32", Thread: 1/4-28, Thread Length: 1-61/64"

NAS428HK4A14

Fastener Length: 1-9/16", Hole Diameter: 3/64", Thread: 1/4-28, Thread Length: 1-9/16"

NAS428HK4A13

Fastener Length: 1-7/16", Hole Diameter: 3/64", Thread: 1/4-28, Thread Length: 1-13/32"

NAS428HK4A12

$4.20 EA, Fastener Length: 1-1/4in., Hole Diameter: 1/32in., Thread: 1/4-28, Thread Length: 1-7/32in.

NAS428HK4A11

Fastener Length: 1-3/16", Thread: 1/4-28, Thread Length: 1-3/16"

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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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