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NAS1578A3R20

Screw, Close Tolerance

Part number
NAS1578A3R20
NSN
5305-01-058-7073
NIIN
01-058-7073
Item name
Screw, Close Tolerance
Manufacturer
National Aerospace Standards
CAGE code
80205
FSC
5305
Unit of issue
EA
DEMIL code
A

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Alternate part numbers

Technical characteristics

Thread Class
3A
Thread Direction
Right-hand
Thread Length
0.338 inches minimum and 0.388 inches maximum
Fastener Length
1.598 inches minimum and 1.628 inches maximum
Head Style
Pan no. 2
Head Diameter
0.360 inches minimum and 0.374 inches maximum
Head Height
0.115 inches minimum and 0.125 inches maximum
Grip Diameter
0.1885 inches minimum and 0.1895 inches maximum
Internal Drive Style
Offset cruciform (torque set)
Nominal Thread Diameter
0.190 inches
Grip Length
1.240 inches minimum and 1.260 inches maximum
Thread Quantity per Inch
32
Minimum Tensile Strength
160000 pounds per square inch
Hardness Rating
36.0 rockwell C minimum overall and 40.0 rockwell C maximum overall
Surface Finish
32.0 microinches bearing surface of head
Surface Finish
32.0 microinches grip
Surface Finish
32.0 microinches threads
Special Features
Internal drive ribbed
Material
Steel comp E4340 overall or steel comp 4140 overall or steel comp 8740 overall or steel comp 6150 overall or steel comp 8735 overall
Surface Treatment
Cadmium overall and chromate overall
Surface Treatment Document and Classification
QQ-P-416 TY2 CL2 fed spec single treatment response overall
Thread Series Designator
UNJF
Specification/Standard Data
80205-NAS1578 professional/industrial association standard
Catalogue data is compiled from public DLA/FLIS sources and is provided for identification. Availability, condition and certification are confirmed on quotation. OmniSynk Distribution Services is a stocking distributor.

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