MS3498-4

Screw, Externally Relieved Body

Part number

MS3498-4

NSN

5305-01-157-7156

NIIN

01-157-7156

Item name

Screw, Externally Relieved Body

Manufacturer

Military Standards

CAGE code

96906

FSC

5305

Unit of issue

EA

DEMIL code

A

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Alternate part numbers

• MS3498-4 CAGE 80205
• MS3498-4 CAGE 96906

Technical characteristics

Thread Class

2A

Thread Direction

Right-hand

Thread Length

0.225 inches minimum and 0.235 inches maximum

Fastener Length

0.535 inches minimum and 0.555 inches maximum

Head Style

Pan no. 2

Head Diameter

0.255 inches minimum and 0.285 inches maximum

Head Height

0.060 inches minimum and 0.080 inches maximum

First Diameter from Head

0.084 inches minimum and 0.089 inches maximum

Distance from Largest Bearing Surface of Head to End of First Diameter

0.310 inches minimum and 0.320 inches maximum

Internal Drive Style

SLOT

Nominal Thread Diameter

0.138 inches

Thread Quantity per Inch

32

Externally Relieved Body Diameter Quantity

1

Material

Steel corrosion resisting overall

Material Document and Classification

Ams 5640 type I assn std all material responses overall or aisi T-303 assn std all material responses overall

Thread Series Designator

UNC

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