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NAS1581K3R4

Screw, Close Tolerance

Part number
NAS1581K3R4
NSN
5305-01-678-0914
NIIN
01-678-0914
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
0.598 inches minimum and 0.628 inches maximum
Head Style
Flat countersunk
Head Diameter
0.2578 inches minimum and 0.3047 inches maximum
Grip Diameter
0.1890 inches minimum and 0.1895 inches maximum
Internal Drive Style
Offset cruciform (torque set)
Nominal Thread Diameter
0.190 inches
Grip Length
0.240 inches minimum and 0.260 inches maximum
Thread Quantity per Inch
32
Minimum Tensile Strength
160000 pounds per square inch
Countersink Angle
99.0 degrees minimum and 101.0 degrees maximum
Part Name Assigned BY Controlling Agency
Screw, close tolerance
Material
Titanium alloy overall
Material Document and Classification
Ams 4967 6AL-4V assn std single material response overall
Surface Treatment
Aluminum overall
Surface Treatment Document and Classification
Nas 4006 assn std single treatment response overall
Thread Series Designator
UNJF
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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