AN178-25

View detailed technical data, stock status, and sourcing information for: AN178-25
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-00-685-3436

Item Name Code

27851

Assigment Date

01/01/1963 (63 years ago)

right-hand thread direction, 2.719 inches nominal fastener length, 3a thread class, 0.781 inches minimum thread length, hexagon 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: 0.781 inches minimum
Fastener Length: 2.719 inches nominal
Head Style: hexagon
Head Height: 0.265 inches minimum and 0.297 inches maximum
Width Between Flats: 0.740 inches minimum and 0.752 inches maximum
Grip Diameter: 0.4986 inches minimum and 0.4991 inches maximum
Nominal Thread Diameter: 0.500 inches
Grip Length: 1.938 inches nominal
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 125000 pounds per square inch
Hardness Rating: 26.0 rockwell c minimum and 32.0 rockwell c maximum overall
Surface Finish: 63.0 microinches bearing surface of head
Surface Finish: 63.0 microinches grip
Material: steel comp 8740 or steel comp 8630 or steel comp 8735 or steel comp 4140 or steel comp 4130 overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416 ty 2 cl 3 fed spec all treatment responses 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Below is a list of NSNs that have been officially superseded by this NSN: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
5306-01-466-9158	No Name Available	10/01/2001

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
5210306 PART 24	Close Tolerance Bolt
AN178-25	Close Tolerance Bolt
AN178-25A	Close Tolerance Bolt

FAQs

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

What is the FSCG of the NSN 5306-00-685-3436?

The FSCG of the NSN 5306-00-685-3436 is 5306

Does the NSN 5306-00-685-3436 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-00-685-3436 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 5306-00-685-3436 contain precious materials?

Precious metal content is unknown

Does NSN 5306-00-685-3436 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 5306-00-685-3436 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963