NAS1221-6-20

View detailed technical data, stock status, and sourcing information for: NAS1221-6-20
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-354-1915

Item Name Code

06657

Assigment Date

02/25/1992 (34 years ago)

right-hand thread direction, 3a thread class, 0.579 inches nominal thread length, flat countersunk head style, 1.814 inches minimum and 1.844 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: 0.579 inches nominal
Fastener Length: 1.814 inches minimum and 1.844 inches maximum
Head Style: flat countersunk
Head Diameter: 0.703 inches minimum and 0.762 inches maximum
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.375 inches
Thread Quantity Per Inch: 24
Minimum Tensile Strength: 160000 pounds per square inch
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Screw Material: steel comp 4140 or steel comp e4340 or steel comp 8740
Screw Material Document And Classification: mil-s-5626 mil spec 1st material response or mil-s-5000 mil spec 2nd material response or mil-s-6049 mil spec 3rd material response
Screw Surface Treatment: cadmium and chromate
Screw Surface Treatment Document And Classification: qq-p-416 type 2 class 2 fed spec single treatment response
Thread Series Designator: unjf

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
NAS1221-6-20	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-354-1915?

The FSCG of the NSN 5305-01-354-1915 is 5305

Does the NSN 5305-01-354-1915 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-354-1915 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 5305-01-354-1915 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-354-1915 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 5305-01-354-1915 was assigned to the Federal Catalog?

It was assigned 34 years ago, on Tue, Feb 25, 1992