NATO Stock Number
5305-01-088-7421
Sold in multiples of
1 EA
DEMIL
NO
Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.171 inches and 0.312 inches
Fastener Length
Between 0.280 inches and 0.312 inches
Head Style
Pan
Head Diameter
Between 0.306 inches and 0.322 inches
Head Height
Between 0.105 inches and 0.115 inches
Washer Quantity
2
Internal Drive Style
Cross recess type 1
Thread Diameter
0.164 inches
Thready Qty Per Inch (tpi)
32
Secondary Washer Relationship To Primary Washer
Not identical
Secondary Washer Style
Flat
Primary Washer Outside Diameter
0.293 inches
Secondary Washer Outside Diameter
Between 0.307 inches and 0.317 inches
Primary Washer Style
Split helical ring
Primary Washer Material Thickness
Between 0.040 inches and 0.046 inches
Secondary Washer Material Thickness
Between 0.013 inches and 0.019 inches
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 or steel comp 420 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 or steel comp 347 secondary washer or steel comp 348 secondary washer
Material
Steel comp 430 fastener or steel comp 302 fastener or steel comp 303 fastener or steel comp 303se fastener
Material Specification
66 federal standard all material responses primary washer
Material Specification
Mil-s-5059 military specification 1st material response secondary washer or mil-s-5059 military specification 2nd material response secondary washer or mil-s-5059 military specification 3rd material response secondary washer or mil-s-5059 military specification 4th material response secondary washer or mil-s-6721 military specification 5th material response secondary washer or mil-s-6721 military specification 6th material response secondary washer
Material Specification
Qq-s-763 federal specification 1st material response fastener or mil-s-7720 military specification 2nd material response fastener or astm a582 assn standard 3rd material response fastener or astm a582 assn standard 4th material response fastener
Surface Treatment
Passivate fastener
Surface Treatment
Passivate primary washer
Surface Treatment
Passivate secondary washer
Surface Treatment Specification
Qq-p-35 federal specification single treatment response primary washer
Thread Series Designator
Unc
Specification Data
80205-nas1301 professional/industrial association standard
