5305-01-338-7581

Find complete technical information, availability, and procurement data for: 5305-01-338-7581
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-338-7581

Item Name Code

06657

Assigment Date

05/10/1991 (35 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, hexagon head style, 2.609 inches minimum and 2.656 inches maximum fastener length, 2.545 inches minimum and 2.614 inches maximum thread length, 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: 3a
Thread Direction: right-hand
Thread Length: 2.545 inches minimum and 2.614 inches maximum
Fastener Length: 2.609 inches minimum and 2.656 inches maximum
Head Style: hexagon
Head Height: 0.105 inches minimum and 0.120 inches maximum
Width Between Flats: 0.305 inches minimum and 0.314 inches maximum
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.190 inches
Thread Quantity Per Inch: 32
Minimum Tensile Strength: 160000 pounds per square inch
Screw Material: iron alloy 660
Screw Material Document And Classification: ams 5731 assn std single material response or ams 5737 assn std single material response
Screw Surface Treatment: passivate
Screw Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response
Bearing Surface Of Head Surface Finish: 63.0 microinches
Thread Surface Finish: 32.0 microinches
Thread Series Designator: unjf
Specification/Standard Data: 80205-nas1802 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
NAS1802-3-42	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-338-7581?

The FSCG of the NSN 5305-01-338-7581 is 5305

Does the NSN 5305-01-338-7581 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-338-7581 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 5305-01-338-7581 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-338-7581 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 5305-01-338-7581 was assigned to the Federal Catalog?

It was assigned 35 years ago, on Fri, May 10, 1991