HT239PB4-4

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Description:

Fastener Length: 9/16", Thread: 1/4-28, Thread Length: 21/64"

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HT239PB4-4 Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.296 inches minimum and 0.336 inches maximum
Fastener Length:
0.556 inches minimum and 0.576 inches maximum
Head Style:
Flat countersunk
Head Diameter:
0.390 inches minimum and 0.395 inches maximum
Grip Diameter:
0.2485 inches minimum and 0.2495 inches maximum
Internal Drive Style:
High-torque
Thread Diameter:
0.250 inches
Grip Length:
0.240 inches minimum and 0.260 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
Countersink Angle:
99.0 degrees minimum and 101.0 degrees maximum
Surface Finish:
63.0 microinches grip
Material:
Steel comp 4140 overall or steel comp e4340 overall or steel comp 6150 overall or steel comp 8735 overall or steel comp 8740 overall or steel comp 4130 overall
Material Specification:
Mil-s-5626 mil spec 1st material response overall or mil-s-5400 mil spec 2nd material response overall or mil-s-8503 mil spec 3rd material response overall or mil-s-6098 mil spec 4th material response overall or mil-s-6049 mil spec 5th material response overall or mil-s-6758 mil spec 6th material response overall
Surface Treatment:
Cadmium overall and chromate overall
Surface Treatment Specification:
Qq-p-416,ty 2 cl 3 fed spec single treatment response overall
Thread Series Designator:
Unf
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Steel
Length 9/16

Additional Information

SKU / Model: HT239PB44
NSN: 5305-00-151-6968
FSC: Screws / 5305
Product Series: HT239PB4
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 45 EA
Schedule B: 7318.15.8085
ECCN: 9A991
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
HT239PB4-4_Military-Fasteners-com.pdf
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More HT239PB4 close tolerance screws

HT239PB4-9

Fastener Length: 29/32", Thread: 1/4-28, Thread Length: 11/32"

HT239PB4-8

Fastener Length: 13/16", Thread: 1/4-28, Thread Length: 21/64"

HT239PB4-5

Fastener Length: 5/8", Thread: 1/4-28, Thread Length: 21/64"

HT239PB4-12

Fastener Length: 1-3/32", Thread: 1/4-28, Thread Length: 11/32"

HT239PB4-10

Screw

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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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