4-40X3-16

View detailed technical data, stock status, and sourcing information for: 4-40X3-16
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-018-7238

Item Name Code

06657

Assigment Date

03/30/1976 (50 years ago)

An externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. A locking feature may be incorporated in the design of the head or threads.

0.294 inches minimum and 0.375 inches maximum thread length, fillister head style, 0.344 inches minimum and 0.375 inches maximum fastener length, right-hand thread direction, 2a thread class

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 2a
Thread Direction: right-hand
Thread Length: 0.294 inches minimum and 0.375 inches maximum
Fastener Length: 0.344 inches minimum and 0.375 inches maximum
Head Style: fillister
Head Diameter: 0.166 inches minimum and 0.183 inches maximum
Head Height: 0.069 inches minimum and 0.079 inches maximum
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.112 inches
Thread Quantity Per Inch: 40
Screw Material: steel comp 304l or steel comp 304 or steel comp 305 or steel comp 301 or steel comp 302
Screw Surface Treatment: passivate
Screw Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response
Thread Series Designator: unc

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
4-40X3-16	Machine Screw
802164=206	Machine Screw

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5305-01-018-7238?

The FSCG of the NSN 5305-01-018-7238 is 5305

Does the NSN 5305-01-018-7238 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-018-7238 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 5305-01-018-7238 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-018-7238 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 5305-01-018-7238 was assigned to the Federal Catalog?

It was assigned 50 years ago, on Tue, Mar 30, 1976