HT3N-3D

View detailed technical data, stock status, and sourcing information for: HT3N-3D
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-308-1807

Item Name Code

29294

Assigment Date

10/21/1973 (52 years ago)

3a thread class, right-hand thread direction, 0.380 inches minimum and 0.447 inches maximum thread length, 0.578 inches minimum and 0.625 inches maximum fastener length, 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: 0.380 inches minimum and 0.447 inches maximum
Fastener Length: 0.578 inches minimum and 0.625 inches maximum
Head Style: flat countersunk
Head Diameter: 0.376 inches minimum and 0.381 inches maximum
Grip Diameter: 0.1890 inches minimum and 0.1895 inches maximum
Shank Unthreaded Hole Diameter: 0.070 inches nominal first hole
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.190 inches
Grip Length: 0.178 inches minimum and 0.198 inches maximum
Thread Quantity Per Inch: 32
Countersink Angle: 100.0 degrees minimum
Distance From Head Largest Bearing Surface To Shank Hole Center: 0.139 inches nominal first hole
Surface Finish: 32.0 microinches bearing surface of head
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Material: iron alloy 660 overall
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
3M123-3D3	Close Tolerance Screw
HT3N-3D	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-00-308-1807?

The FSCG of the NSN 5305-00-308-1807 is 5305

Does the NSN 5305-00-308-1807 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-308-1807 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 5305-00-308-1807 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-308-1807 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 5305-00-308-1807 was assigned to the Federal Catalog?

It was assigned 52 years ago, on Sun, Oct 21, 1973