HT4025L4D25

View detailed technical data, stock status, and sourcing information for: HT4025L4D25
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-550-1577

Item Name Code

29294

Assigment Date

10/18/1974 (51 years ago)

flat countersunk head style, 3a thread class, 2.031 inches nominal fastener length, 0.469 inches nominal thread length, right-hand thread direction

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: 2.031 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: 1.562 inches nominal
Thread Quantity Per Inch: 28
Countersink Angle: 100.0 degrees nominal
Distance From Head Largest Bearing Surface To Shank Hole Center: 1.895 inches minimum and 1.935 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
11905-4DL25	Close Tolerance Screw
HT4025L4D25	Close Tolerance Screw
ST3M454-4DL25	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-00-550-1577?

The FSCG of the NSN 5305-00-550-1577 is 5305

Does the NSN 5305-00-550-1577 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-550-1577 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 5305-00-550-1577 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-550-1577 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 5305-00-550-1577 was assigned to the Federal Catalog?

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