5305-01-079-5139

Find complete technical information, availability, and procurement data for: 5305-01-079-5139
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-079-5139

Item Name Code

06657

Assigment Date

07/07/1979 (47 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.

2a thread class, 2.406 inches minimum and 2.500 inches maximum fastener length, 2.196 inches minimum and 2.390 inches maximum thread length, right-hand thread direction, flat countersunk head style

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: 2.196 inches minimum and 2.390 inches maximum
Fastener Length: 2.406 inches minimum and 2.500 inches maximum
Head Style: flat countersunk
Head Diameter: 0.442 inches minimum and 0.507 inches maximum
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 55000 pounds per square inch
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Screw Material Document And Classification: qq-w-321 fed spec all material responses or qq-b-626 fed spec all material responses
Screw Surface Treatment: oxide
Screw Surface Treatment Document And Classification: mil-f-495 mil spec single treatment response
Thread Series Designator: unc
Nondefinitive Spec/Std Data: 3 type and 3c style

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
MS24693-DB108	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-079-5139?

The FSCG of the NSN 5305-01-079-5139 is 5305

Does NSN 5305-01-079-5139 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 5305-01-079-5139 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-079-5139 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 5305-01-079-5139 was assigned to the Federal Catalog?

It was assigned 47 years ago, on Sat, Jul 7, 1979