NAS1578C4R16

Screw, Close Tolerance

Part number

NAS1578C4R16

NSN

5305-01-438-8283

NIIN

01-438-8283

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

• NAS1578C4R16 CAGE 80205

Technical characteristics

Thread Class

3A

Thread Direction

Right-hand

Thread Length

0.378 inches minimum and 0.428 inches maximum

Fastener Length

1.388 inches minimum and 1.418 inches maximum

Head Style

Pan no. 2

Head Diameter

0.477 inches minimum and 0.492 inches maximum

Head Height

0.140 inches minimum and 0.150 inches maximum

Grip Diameter

0.2490 inches minimum and 0.2495 inches maximum

Internal Drive Style

Offset cruciform (torque set)

Nominal Thread Diameter

0.250 inches

Grip Length

0.990 inches minimum and 1.010 inches maximum

Thread Quantity per Inch

28

Material

Iron alloy 660 overall

Thread Series Designator

UNJF

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