NAS1581K4R4

Screw, Close Tolerance

Part number

NAS1581K4R4

NSN

5305-01-707-0054

NIIN

01-707-0054

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

• NAS1581K4R4G CAGE 80205

Technical characteristics

Thread Class

3A

Thread Direction

Right-hand

Thread Length

0.403 inches nominal

Fastener Length

0.653 inches nominal

Head Height

0.090 inches maximum

Grip Diameter

0.2490 inches minimum and 0.2495 inches maximum

Internal Drive Style

Offset cruciform (torque set)

End Item Identification

1510-33-209-1522; A400M cargo-transport airplane (T.23)

Thread Quantity per Inch

20

Countersink Angle

99.0 degrees minimum and 101.0 degrees maximum

Part Name Assigned BY Controlling Agency

Bolt, sheat 100 flush reduced head, offset cruiciform

Material

Titanium overall

Thread Series Designator

UNJF

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