HT4025L4D20

View detailed technical data, stock status, and sourcing information for: HT4025L4D20
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-550-1573

Item Name Code

29294

Assigment Date

10/18/1974 (51 years ago)

1.719 inches nominal fastener length, 0.469 inches nominal thread length, right-hand thread direction, 3a thread class, flat countersunk head style

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: 1.719 inches nominal
Head Style: flat countersunk
Head Diameter: 0.497 inches minimum and 0.507 inches maximum
Grip Diameter: 0.2490 inches minimum and 0.2495 inches maximum
Shank Unthreaded Hole Diameter: 0.076 inches minimum and 0.081 inches maximum first hole
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.250 inches
Grip Length: 1.250 inches nominal
Thread Quantity Per Inch: 28
Countersink Angle: 100.0 degrees nominal
Distance From Head Largest Bearing Surface To Shank Hole Center: 1.583 inches minimum and 1.623 inches maximum first hole
Material: steel corrosion resisting 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
11905-4LD20	Close Tolerance Screw
HT4025L4D20	Close Tolerance Screw
ST3M454-4LD20	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-00-550-1573?

The FSCG of the NSN 5305-00-550-1573 is 5305

Does the NSN 5305-00-550-1573 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-550-1573 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 5305-00-550-1573 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-550-1573 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 5305-00-550-1573 was assigned to the Federal Catalog?

It was assigned 51 years ago, on Fri, Oct 18, 1974