AN178C26A

View detailed technical data, stock status, and sourcing information for: AN178C26A
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-443-6694

Item Name Code

27851

Assigment Date

04/15/1997 (29 years ago)

A shaped metallic item designed to increase the effectiveness of radio frequency/electromagnetic interference, or a nonmetallic item containing a wire mesh, metal, or other electrically conductive particles designed to provide environmental sealing and radio frequency/electromagnetic interference shielding. For bulk items see wire mesh, knitted or gasketing material, conductive.

3a thread class, 0.750 inches minimum and 0.829 inches maximum thread length, hexagon head style, right-hand thread direction, 2.828 inches minimum and 2.875 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: 0.750 inches minimum and 0.829 inches maximum
Fastener Length: 2.828 inches minimum and 2.875 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
Head Minor Diameter: 0.870 inches nominal
Nominal Thread Diameter: 0.500 inches
Grip Length: 2.046 inches minimum and 2.078 inches maximum
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 125000 pounds per square inch
Material: steel comp 431 overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: qq-p-416,ty2,cl3 fed spec single treatment 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
AN178C26A	Close Tolerance Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-443-6694?

The FSCG of the NSN 5306-01-443-6694 is 5306

Does the NSN 5306-01-443-6694 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-443-6694 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 5306-01-443-6694 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-01-443-6694 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 5306-01-443-6694 was assigned to the Federal Catalog?

It was assigned 29 years ago, on Tue, Apr 15, 1997