NAS1580C4T2

Screw, Close Tolerance

Part number

NAS1580C4T2

NSN

5305-01-522-2116

NIIN

01-522-2116

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

• NAS1580-C4T-26 CAGE 80205

Technical characteristics

Thread Class

3A

Thread Direction

Right-hand

Thread Length

0.403 inches nominal

Fastener Length

1.610 inches minimum and 1.640 inches maximum

Head Style

Flat countersunk

Head Diameter

0.464 inches minimum and 0.506 inches maximum

Grip Diameter

0.2485 inches minimum and 0.2495 inches maximum

Internal Drive Style

Offset cruciform (torque set)

End Item Identification

T-38 acft

Nominal Thread Diameter

0.250 inches

Grip Length

1.207 inches minimum and 1.237 inches maximum

Thread Quantity per Inch

28

Countersink Angle

99.0 degrees minimum and 101.0 degrees maximum

Part Name Assigned BY Controlling Agency

Screw, close tolerance

Material

Steel corrosion resisting overall

Surface Treatment

Passivate overall

Thread Series Designator

UNJF

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