HT4020-4-11

View detailed technical data, stock status, and sourcing information for: HT4020-4-11
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-494-8089

Item Name Code

29294

Assigment Date

02/25/2002 (24 years ago)

right-hand thread direction, flat countersunk undercut head style, 3a thread class, 0.469 inches nominal thread length, 1.141 inches minimum and 1.188 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: 0.469 inches nominal
Fastener Length: 1.141 inches minimum and 1.188 inches maximum
Head Style: flat countersunk undercut
Head Diameter: 0.5018 inches minimum and 0.5066 inches maximum
Head Height: 0.0713 inches minimum and 0.0733 inches maximum
Grip Diameter: 0.2490 inches minimum and 0.2495 inches maximum
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.2500 inches
Grip Length: 0.678 inches minimum and 0.698 inches maximum
Thread Quantity Per Inch: 28
Countersink Angle: 100.0 degrees nominal
Part Name Assigned By Controlling Agency: navy special project
Special Features: item intended for use in fuel sealing applications
Material: steel corrosion resisting 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
HT4020-4-11	Close Tolerance Screw
ST3M652C4-11D	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-494-8089?

The FSCG of the NSN 5305-01-494-8089 is 5305

Does the NSN 5305-01-494-8089 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-494-8089 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 5305-01-494-8089 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-494-8089 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 5305-01-494-8089 was assigned to the Federal Catalog?

It was assigned 24 years ago, on Mon, Feb 25, 2002