840566-1

View detailed technical data, stock status, and sourcing information for: 840566-1
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-538-7787

Item Name Code

05277

Assigment Date

09/25/1974 (51 years ago)

prevailing torque with nonmetallic insert locking feature, 3b thread class, hexagon nut style, dry film lubricant lubrication, right-hand thread direction

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3b
Thread Direction: right-hand
Locking Feature: prevailing torque with nonmetallic insert
Lubrication: dry film lubricant
Nut Style: hexagon
Nut Height: 0.170 inches minimum and 0.190 inches maximum
Width Across Flats: 0.302 inches minimum and 0.314 inches maximum
Temp Rating: 250.0 fahrenheit nominal
Thread Series: unc
Thread Quantity Per Inch: 32
Nominal Thread Size: 0.164 inches
Bearing Surface Type: chamfered
Material: plastic locking insert
Material: steel nut
Material Document And Classification: mil-p-79,ty fbe mil spec single material response locking insert
Surface Treatment: cadmium overall except insert
Surface Treatment Document And Classification: qq-p-416,ty 1,cl 3 fed spec single treatment response overall except insert

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
22NM408-82	Hexagon Self-Locking Nut
840566-1	Hexagon Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-538-7787?

The FSCG of the NSN 5310-00-538-7787 is 5310

Does the NSN 5310-00-538-7787 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-538-7787 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 5310-00-538-7787 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-538-7787 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 5310-00-538-7787 was assigned to the Federal Catalog?

It was assigned 51 years ago, on Wed, Sep 25, 1974