close
close
close
Request Information
THREAD: AS8879
MATERIAL:
  • Nut - 4130 alloy steel (UNS G41300) or 8740 alloy steel (UNS G87400).
  • Basket, Channel and Spring - 17-7PH stainless steel (UNS S17400).
FINISH:
F51559-3-(*), F51559A3-(*) and F51559-4-(*):
  • Nut - Cadmium plate per AMS-QQ-P-416, Type II, Class 2, plus Kaylube molybdenum disulfide dry film lubricant coat per AS5272, Type I.
  • Basket, Channel and Spring - Passivate per AMS2700 and Kaylube molybdenum disulfide dry film lubricant coat per AS5272, Type I.
F51559-3-(*)C, F51559A3-(*)C and F51559-4-(*)C:
  • Nut, Basket and Channel - Cadmium plate per QQ-P-416, Type II, Class 2, plus Kaylube molybdenum disulfide dry film lubricant coat per AS5272, Type I.
  • Spring - Passivate per AMS2700 and Kaylube molybdenum disulfide dry film lubricant coat per AS5272, Type I.
PERFORMANCE: NASM25027, except torque out not required and axial tensile strength of 700 lbs min.
TEMPERATURE: 450°F.
FLOATABILITY:
  • F51559-3-(*) - .150 minimum radially from center.
  • F51559A3-(*) - .100 minimum radially from center.
  • F51559-4-(*) - .100 minimum radially from center.
NOTES: Spring load shall be 25 ± 3 lbs. when the nut element shank protrudes from the bearing surface of the basket a distance equal to the nominal structure thickness. Additional protrusion of .013 ±.007 will cause the nut element flange to bottom out.
Unit of Measure

Specifications

Structure Thickness
+.004
-.005

 N/A 0.275

D

 N/A 0.270-0.265

E

 N/A 0.345-0.340

H - MAX

 N/A 0.553

M ± .005

 N/A 0.413

N - REF

 N/A 0

Approx. Weight (LBS/100)

 N/A 2.290

Floatability

 N/A 0.100 Min. Radially from Center

Nut Finish

 N/A Cadmium Plate per QQ-P-416, Type II, Class 2, plus Kaylube Molybdenum Disulfide Dry Film Lubricant Coat per AS5272, Type I

Basket Finish

 N/A Cadmium Plate per QQ-P-416, Type II, Class 2, plus Kaylube Molybdenum Disulfide Dry Film Lubricant Coat per AS5272, Type I

Channel Finish

 N/A Cadmium Plate per QQ-P-416, Type II, Class 2, plus Kaylube Molybdenum Disulfide Dry Film Lubricant Coat per AS5272, Type

Spring Finish

 N/A Passivate per QQ-P-35 and Kaylube Molybdenum Disulfide Dry Film Lubricant Coat per AS5272, Type I

Thread Type

 N/A Unified

Configuration 1

 N/A Two Lug

Configuration 2

 N/A Floating

Configuration 3

 N/A Spring Loaded

Lock

 N/A Crimp Lock

Simplified Material

 N/A Alloy Steel

Temperature

 N/A 450°F - 235°C

Thread

 N/A 0.2500-28 UNJF-3B