NAS1291C4M Nut

Part#: NAS1291C4M NSN: 5310-00-894-3637

About this product thread 1/4-28.

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NAS1291C4M NAS1291C4M NAS1291C4M NAS1291C4M NAS1291C4M

Product Details

Part Number or Model NAS1291C4M
Description Nut
Schedule B Class
ECCN (Export Control Class) EAR99
Thread Size 0.250 inches
Thread Series Unf
Thread Qty Per Inch (tpi) 28
Thread Class 3b
Thread Direction Right-hand
Tempurature Rating 550 degree fahrenheit nominal
Surface Treatment Passivate
Overall Height 0.205 inches minimum and 0.219 inches maximum
Nut Style Hexagon
Material Steel corrosion resisting
Locking Feature Prevailing torque all metal design
Washer Outside Diameter 0.420 inches maximum
Washer Thickness 0.019 inches minimum
Width Across Flats 0.305 inches minimum and 0.316 inches maximum

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  • NSN (National stock number)
  • Manufactured By
  • ECCN (Export Control Class)


  • H42-4

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