AN178C21A

View detailed technical data, stock status, and sourcing information for: AN178C21A
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-665-3606

Item Name Code

27851

Assigment Date

07/26/2017 (9 years ago)

An item so shaped as to deflect one or more of the following: dust, dirt, grease, oil, or liquid into a desired direction or away from a particular area. Can be attached to a stationary or with a revolving part. May or may not be a mechanical device.

3a thread class, right-hand thread direction, 2.209 inches minimum and 2.250 inches maximum fastener length, hexagon head style, 0.608 inches nominal thread 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: 0.608 inches nominal
Fastener Length: 2.209 inches minimum and 2.250 inches maximum
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
Internal Drive Style: w/o internal drive
Nominal Thread Diameter: 0.500 inches
Grip Length: 1.422 inches minimum and 1.454 inches maximum
Thread Quantity Per Inch: 20
Part Name Assigned By Controlling Agency: bolt-machine,close tolerance,aircraft
Material: steel corrosion resisting overall
Material Document And Classification: mil-b-6812 mil spec single material response overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: qq-p-416,ty ii,cl 3 and iaw mil-b-6812 fed spec single treatment response overall
Thread Series Designator: unf
Specification/Standard Data: 88044-an173 thru an186 government standard

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
AN178C21A	Close Tolerance Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-665-3606?

The FSCG of the NSN 5306-01-665-3606 is 5306

Does the NSN 5306-01-665-3606 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-665-3606 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 5306-01-665-3606 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-01-665-3606 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 5306-01-665-3606 was assigned to the Federal Catalog?

It was assigned 9 years ago, on Wed, Jul 26, 2017