NAS1221-4-7

Machine Screw

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Description:

NAS1221-4-7 Machine Screw

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NAS1221-4-7 Datasheet Features and Specification

Thread Class:
3a
Thread Direction:
Right-hand
Thread Length:
0.401 inches minimum and 0.451 inches maximum
Fastener Length:
0.849 inches minimum and 0.879 inches maximum
Head Style:
Flat countersunk
Head Diameter:
0.461 inches minimum and 0.507 inches maximum
Internal Drive Style:
High-torque
Thread Diameter:
0.250 inches
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
Countersink Angle:
99.0 degrees minimum and 101.0 degrees maximum
Screw Material:
Steel comp 4140 or steel comp e4340 or steel comp 8740
Screw 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
Screw Surface Treatment:
Cadmium
Screw Surface Treatment Specification:
Qq-p-416,ty 1,cl 3 fed spec single treatment response
Thread Series Designator:
Unjf
Specification Data:
80205-nas1221 professional/industrial association standard

Additional Information

SKU / Model: NAS122147
NSN: 5305-01-014-1174
FSC: Screws / 5305
Pack Weight (Approx.) 0.000 lb
Minimum Qty (MOQ): 10
Schedule B: 7318.15.2095
ECCN: EAR99
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
NAS1221-4-7_Military-Fasteners-com.pdf
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Great supplier to work with. Prompt replies to inquiries, accurate information, quick turnaround shipping, personal touch with all communications. Trisha Hawkins has been a great representative for all of our questions and concerns.

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I placed an order with Lindsey at Military Fasteners late afternoon, 3:15 to be exact and she was nice enough to expedite my order and made sure to get it shipped that day. Great company with great people.

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Military Fasteners is first on my list for the hard to find items so often associated with Government Projects. Brittany and Michael have always been quick to respond and nothing but professional in every way. I look forward to a continued relationship with Military Fasteners.

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As always, my order was filled accurately and arrived quickly. The one item not in stock in California arrived two days later from another store. Over the years, whether a large order or just a few items,I have received the same quick service. My suggestion? Continue the excellent customer service.

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