MS21244-4

Military Standard Plain Castellated Hexagon Nut

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Description:

Assembled washer, 1/4-28 unjf thread, A grade steel, MS21244 series nut

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MS21244-4
MS21244-4
MS21244-4
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MS21244-4 Datasheet Features and Specification

Thread Class:
3b
Thread Direction:
Right-hand
Washer Outside Diameter:
0.530 inches minimum and 0.560 inches maximum
Counterbore Diameter:
0.299 inches minimum nut and 0.309 inches maximum nut
Overall Height:
0.365 inches minimum and 0.405 inches maximum
Nut Style:
Flat with turned back edge
Nut Counterbore Depth:
0.172 inches minimum nut and 0.192 inches maximum nut
Width Across Flats:
0.430 inches minimum and 0.439 inches maximum
Tempurature Rating:
450.0 deg fahrenheit maximum
Thread Series:
Unjf
Thready Qty Per Inch (tpi):
28
Thread Size:
0.250 inches
Bearing Surface Finish:
125.0 microinches
Material:
Steel comp 302 washer or steel comp 321 washer
Material:
Steel nut
Surface Treatment:
Cadmium nut and chromate nut
Surface Treatment:
Passivate washer
Surface Treatment Specification:
Qq-p-35 fed spec single treatment response washer
Surface Treatment Specification:
Qq-p-416 type 2 class 2 fed spec single treatment response nut
Nondefinitive Specification/std Data:
A grade
Quick Specs
Thread Size 1/4
Thread Qty 28
Material Steel

Additional Information

Alternate Part Numbers

  • MSY03919
SKU / Model: MS212444
NSN: 5310-00-126-5753
FSC: Nuts and Washers / 5310
Product Series: MS21244
Pack Weight (Approx.) 0.125 lb
Minimum Qty (MOQ): 10
Schedule B: 7318.16.0085
ECCN: EAR99
National Motor Freight: 093486, Bolts,nuts Or Screws, Noi (sub 3)
Download PDF Version
MS21244-4_Military-Fasteners-com.pdf
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More MS21244 plain castellated hexagon nuts

MS21244-10

MS21244-10 unjf 3b hexagon nut 5/8-18 thread

Product Image Gallery

Product code MS21244-4
MS21244-4
MS21244-4
MS21244-4

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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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