AN73A21

View detailed technical data, stock status, and sourcing information for: AN73A21
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-00-816-5769

Item Name Code

01847

Assigment Date

01/01/1962 (64 years ago)

A nut having 6 flat sides, flat on the bottom and having a slotted cylindrical or dome shaped upper portion. It is designed to provide positive locking when used with a solid or split (cotter) pin. Excludes:nut (1), plain, slotted, hexagon.

0.499 inches minimum thread length, hexagon head style, 3a thread class, right-hand thread direction, 2.156 inches nominal 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: 0.499 inches minimum
Fastener Length: 2.156 inches nominal
Head Style: hexagon
Head Height: 0.172 inches minimum and 0.203 inches maximum
Width Between Flats: 0.367 inches minimum and 0.376 inches maximum
Hole Diameter: 0.070 inches nominal
Nominal Thread Diameter: 0.190 inches
Grip Length: 1.625 inches nominal
Hole Quantity: 6
Hole Type: drilled
Features Provided: finished head
Thread Quantity Per Inch: 24
Minimum Tensile Strength: 125000 pounds per square inch
Hardness Rating: 26.0 rockwell c minimum and 32.0 rockwell c maximum overall
Hole Configuration Style: hexagon longitudinal hole
Material: steel comp 8740 or steel comp 8630 or steel comp 8735 or steel comp 4037 or steel comp 4130 or steel comp 4140 overall
Material Document And Classification: mil-s-6049 mil spec 1st material response or mil-s-6050 mil spec 2nd material response or mil-s-6098 mil spec 3rd material response or ams 6300 assn std 4th material response or mil-s-6758 mil spec 5th material response or mil-s-5626 mil spec 6th material response overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,type 2,class 3 fed spec all treatment responses overall
Thread Series Designator: unc

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5306-00-145-6982	No Name Available	01/01/1960

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
AN73A21	Machine Bolt
MS20074-03-21	Machine Bolt

FAQs

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

What is the FSCG of the NSN 5306-00-816-5769?

The FSCG of the NSN 5306-00-816-5769 is 5306

Does the NSN 5306-00-816-5769 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-00-816-5769 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 5306-00-816-5769 contain precious materials?

Precious metal content is unknown

Does NSN 5306-00-816-5769 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 5306-00-816-5769 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962