NATO Stock Number
5305-01-253-5918
Sold in multiples of
1 EA
DEMIL
NO
Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.369 inches and 0.431 inches
Fastener Length
Between 1.772 inches and 1.882 inches
Head Style
Hexagon
Head Height
Between 0.178 inches and 0.198 inches
Width Between Flats
Between 0.367 inches and 0.375 inches
Internal Drive Style
W/o internal drive
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
175000 pounds per square inch
Hardness Rating
35.0 rockwell c spring and 45.0 rockwell c spring
Hardness Rating
35.0 rockwell c primary washer and 43.0 rockwell c primary washer
Material
Steel comp 301 primary washer or steel comp 302 primary washer or steel comp 302b primary washer or steel comp 303 primary washer or steel comp 303se primary washer or steel comp 304 primary washer or steel comp 304l primary washer or steel comp 305 primary washer or steel comp 308 primary washer or steel comp 309 primary washer or steel comp 309s primary washer or steel comp 310 primary washer or steel comp 310s primary washer or steel comp 314 primary washer or steel comp 316 primary washer or steel comp 316l primary washer or steel comp 317 primary washer or steel comp 321 primary washer or steel comp 347 primary washer or steel comp 348 primary washer or steel comp 384 primary washer or steel comp 385 primary washer
Material
Steel comp 301 secondary washer or steel comp 302 secondary washer or steel comp 304 secondary washer or steel comp 316 secondary washer
Material
Steel comp 302 stand-off or steel comp 304 stand-off or steel comp 304l stand-off or steel comp 305 stand-off or steel comp 309 stand-off or steel comp 310 stand-off or steel comp 316 stand-off or steel comp 316l stand-off or steel comp 317 stand-off or steel comp 321 stand-off or steel comp 322 stand-off or steel comp 324 stand-off or steel comp 347 stand-off
Material
Steel comp 302 spring or steel comp 304 spring
Material
Steel comp xm-13 fastener
Material Specification
66 federal standard all material responses primary washer
Material Specification
Ams5629 assn standard single material response fastener
Material Specification
Astm a313 assn standard all material responses spring
Material Specification
Mil-s-5059 military specification all material responses secondary washer
Material Specification
Qq-s-763 federal specification all material responses stand-off
Surface Treatment
Passivate
Surface Treatment Specification
Qq-p-35 federal specification single treatment response
Thread Series Designator
Unf
