NAS1581C4T18

Close Tolerance Screw

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Description:

length: 1.528", thread: 1/2-28 shear 100°, flush reduced head bolt - cadmium plated corrosion resistant steel - offset cruciform

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NAS1581C4T18 Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.403 inches nominal
Fastener Length:
1.513 inches minimum and 1.543 inches maximum
Head Style:
Flat countersunk
Head Diameter:
0.350 inches minimum and 0.399 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:
1.115 inches minimum and 1.135 inches maximum
Thready Qty Per Inch (tpi):
28
Min. Tensile Strength (psi):
160000 pounds per square inch
Countersink Angle:
99.0 degrees minimum and 101.0 degrees maximum
Surface Finish:
32.0 microinches grip
Surface Finish:
32.0 microinches threads
Material:
Iron alloy 660 overall
Material Specification:
Ams5731 assn std single material response overall or ams5732 assn std single material response overall or ams5737 assn std single material response overall
Surface Treatment:
Passivate overall
Thread Series Designator:
Unjf
Specification Data:
80205-nas1581 professional/industrial association standard
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Iron
Length 1-17/32

Additional Information

SKU / Model: NAS1581C4T18
NSN: 5305-01-443-8385
FSC: Screws / 5305
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 50
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
NAS1581C4T18_Military-Fasteners-com.pdf
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length: 1.094", thread: 3/8-24 shear 100°, flush reduced head bolt - cadmium plated corrosion resistant steel - offset cruciform

NAS1581C5T8P

length: 1.001", thread: 5/16-24 shear 100°, flush reduced head bolt - cadmium plated corrosion resistant steel - offset cruciform"

NAS1581C4T8

length: 0.903", thread: 1/2-28 shear 100°, flush reduced head bolt - cadmium plated corrosion resistant steel - offset cruciform

NAS1581C4T7

Length: 0.841in., thread: 1/2-28 shear, flush reduced head bolt, cadmium plated corrosion resistant steel, offset cruciform

NAS1581C4T6

Length: 0.778in., thread: 1/2-28 shear flush reduced head cadmium plated corrosion resistant steel offset cruciform

NAS1581C4T5

Length: 0.715in., thread: 1/2-28 shear flush reduced head bolt cadmium plated corrosion resistant steel offset cruciform, 5305-01-077-5804

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5.0

I called the customer service line just before Air Venture at Oshkosh to find out if they would have the parts I needed at their booth. The service rep on the phone was very helpful and was able to check the inventory that was taken to Oshkosh.I was told that the parts would not be available but could be shipped from the warehouse without delay. I ordered a full set of intake seals for a Continental 085 on the spot and they arrived in a few days. I am very happy with the service provided, and will be ordering more parts soon! Thank you Larry

5.0

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4.0

Alternator was in stock, shipped same day, arrived quickly (even though I chose standard shipping during the height of the Christmas rush), packed well and at a good price. Well done, Military Fasteners, well done!

4.0