NAS720B4-8

View detailed technical data, stock status, and sourcing information for: NAS720B4-8
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-141-6641

Item Name Code

06660

Assigment Date

11/03/1982 (43 years ago)

pan no. 2 head style, 2a thread class, 0.500 inches nominal thread length, right-hand thread direction, 0.500 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: 2a
Thread Direction: right-hand
Thread Length: 0.500 inches nominal
Fastener Length: 0.500 inches nominal
Head Style: pan no. 2
Head Diameter: 0.219 inches nominal
Head Height: 0.218 inches nominal
Washer Quantity: 2
Internal Drive Style: slot
Nominal Thread Diameter: 0.112 inches
Thread Quantity Per Inch: 40
Minimum Tensile Strength: 55000 pounds per square inch
Secondary Washer Relationship To Primary Washer: not identical
Secondary Washer Style: flat
Primary Washer Outside Diameter: 0.209 inches nominal
Secondary Washer Outside Diameter: 0.213 inches nominal
Primary Washer Style: split helical ring
Primary Washer Material Thickness: 0.025 inches nominal
Secondary Washer Material Thickness: 0.016 inches nominal
Material: copper alloy 510 primary washer
Material: copper alloy 230 fastener
Material: copper alloy secondary washer
Surface Treatment: tin overall
Thread Series Designator: unc
Specification/Standard Data: 80205-nas 720 professional/industrial association 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
NAS720B4-8	Assembled Washer Screw

FAQs

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

What is the FSCG of the NSN 5305-01-141-6641?

The FSCG of the NSN 5305-01-141-6641 is 5305

Does the NSN 5305-01-141-6641 have a Schedule B code assigned?

Yes, the Schedule B code is 7415338550

Does NSN 5305-01-141-6641 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 5305-01-141-6641 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-141-6641 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 5305-01-141-6641 was assigned to the Federal Catalog?

It was assigned 43 years ago, on Wed, Nov 3, 1982