MD3789

View detailed technical data, stock status, and sourcing information for: MD3789
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-00-424-4421

Item Name Code

06675

Assigment Date

01/01/1961 (65 years ago)

right-hand thread direction, 1.375 inches minimum thread length, 1.188 inches nominal head diameter, 4.688 inches nominal fastener length, round w/wrench flats chamfered 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 Direction: right-hand
Thread Length: 1.375 inches minimum
Fastener Length: 4.688 inches nominal
Head Style: round w/wrench flats chamfered
Head Diameter: 1.188 inches nominal
Head Height: 0.500 inches nominal
Width Between Flats: 0.988 inches minimum and 0.990 inches maximum
Shank Unthreaded Hole Diameter: 0.156 inches nominal first hole
First Diameter From Head: 0.751 inches minimum and 0.752 inches maximum
Second Diameter From Head: 0.663 inches minimum and 0.666 inches maximum
Distance From Largest Bearing Surface Of Head To End Of First Diameter: 0.375 inches nominal
Distance From Largest Bearing Surface Of Head To End Of Second Diameter: 3.313 inches nominal
Nominal Thread Diameter: 0.750 inches
Nonstandard Thread Pitch Diameter: +0.7062 to 0.7094 inches
Thread Quantity Per Inch: 16
Hardness Rating: 27.0 rockwell c minimum and 31.0 rockwell c maximum overall
Distance From Head Largest Bearing Surface To Shank Hole Center: 0.219 inches nominal first hole
Externally Relieved Body Diameter Quantity: 2
Special Features: two drilled holes in shank,0.437 in. c to c
Material: steel comp 4140 overall
Thread Series Designator: unf

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2815-00-090-5863	No Name Available	01/01/1963

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
MD3789	Externally Relieved Body Bolt

FAQs

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

What is the FSCG of the NSN 5306-00-424-4421?

The FSCG of the NSN 5306-00-424-4421 is 5306

Does the NSN 5306-00-424-4421 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-00-424-4421 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 5306-00-424-4421 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-00-424-4421 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 5306-00-424-4421 was assigned to the Federal Catalog?

It was assigned 65 years ago, on Sun, Jan 1, 1961