HT123-4-3D

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-450-7449

Item Name Code

29294

Assigment Date

12/29/1969 (56 years ago)

right-hand thread direction, 0.442 inches minimum and 0.509 inches maximum thread length, flat countersunk head style, 3a thread class, 0.640 inches minimum and 0.687 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: 0.442 inches minimum and 0.509 inches maximum
Fastener Length: 0.640 inches minimum and 0.687 inches maximum
Head Style: flat countersunk
Head Diameter: 0.502 inches minimum and 0.507 inches maximum
Grip Diameter: 0.2490 inches minimum and 0.2495 inches maximum
Shank Unthreaded Hole Diameter: 0.070 inches nominal first hole
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.250 inches
Grip Length: 0.178 inches minimum and 0.198 inches maximum
Thread Quantity Per Inch: 28
Hardness Rating: 248.0 brinell standard minimum and 341.0 rockwell superficial 15-n maximum overall
Countersink Angle: 100.0 degrees nominal
Distance From Head Largest Bearing Surface To Shank Hole Center: 0.500 inches nominal first hole
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Material: iron alloy 660 overall
Material Document And Classification: ams 5732 assn std single material response overall
Thread Series Designator: unf

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
3M123-4	Close Tolerance Screw
3M123-4D3	Close Tolerance Screw
54291-4D3	Close Tolerance Screw
E1284D3P	Close Tolerance Screw
HT1029A4T3	Close Tolerance Screw
HT123-4-3D	Close Tolerance Screw
HT4M-3D	Close Tolerance Screw
HT4N-3D	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-00-450-7449?

The FSCG of the NSN 5305-00-450-7449 is 5305

Does the NSN 5305-00-450-7449 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-450-7449 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 5305-00-450-7449 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-450-7449 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 5305-00-450-7449 was assigned to the Federal Catalog?

It was assigned 56 years ago, on Mon, Dec 29, 1969