WC4049-3-7

View detailed technical data, stock status, and sourcing information for: WC4049-3-7
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-102-5520

Item Name Code

29294

Assigment Date

10/22/1980 (45 years ago)

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

3a thread class, 0.251 inches minimum and 0.301 inches maximum thread length, right-hand thread direction, flat countersunk head style, 0.699 inches minimum and 0.729 inches maximum fastener length

Product Characteristics

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

Thread Class: 3a
Thread Direction: right-hand
Thread Length: 0.251 inches minimum and 0.301 inches maximum
Fastener Length: 0.699 inches minimum and 0.729 inches maximum
Head Style: flat countersunk
Head Diameter: 0.376 inches minimum and 0.385 inches maximum
Grip Diameter: 0.1890 inches minimum and 0.1895 inches maximum
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.190 inches
Grip Length: 0.428 inches minimum and 0.448 inches maximum
Thread Quantity Per Inch: 32
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Material: steel corrosion resisting overall
Material Document And Classification: 23-112 fscm 76301 mfr ref single material response overall
Surface Treatment: passivate overall
Thread Series Designator: unjf

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
11931-3-7	Close Tolerance Screw
HT4049-3-7	Close Tolerance Screw
ST3M714-3-7	Close Tolerance Screw
WC4049-3-7	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-102-5520?

The FSCG of the NSN 5305-01-102-5520 is 5305

Does the NSN 5305-01-102-5520 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-102-5520 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 5305-01-102-5520 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-102-5520 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 5305-01-102-5520 was assigned to the Federal Catalog?

It was assigned 45 years ago, on Wed, Oct 22, 1980