NAS1581K3R2G

View detailed technical data, stock status, and sourcing information for: NAS1581K3R2G
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-621-8211

Item Name Code

29294

Assigment Date

09/18/2013 (12 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes:bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.

3a thread class, flat countersunk head style, 0.487 inches nominal fastener length, right-hand thread direction, 0.363 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: 0.363 inches nominal
Fastener Length: 0.487 inches nominal
Head Style: flat countersunk
Head Diameter: 0.3047 inches nominal
Grip Diameter: 0.1885 inches minimum and 0.1895 inches maximum
Internal Drive Style: torque-set ribbed
Nominal Thread Diameter: 0.190 inches
Grip Length: 0.363 inches nominal
Thread Quantity Per Inch: 32
Minimum Tensile Strength: 1600 pounds per square inch
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Material: titanium alloy uns r56400 overall
Material Document And Classification: ams 4928 assn std single material response and ams 4967 assn std single material response overall
Surface Treatment: aluminum overall
Surface Treatment Document And Classification: nas 4006 assn std single treatment response overall
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
NAS1581K3R2G	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-621-8211?

The FSCG of the NSN 5305-01-621-8211 is 5305

Does the NSN 5305-01-621-8211 have a Schedule B code assigned?

Yes, the Schedule B code is 8108908000

Does NSN 5305-01-621-8211 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 5305-01-621-8211 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-621-8211 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 5305-01-621-8211 was assigned to the Federal Catalog?

It was assigned 12 years ago, on Wed, Sep 18, 2013