5305-01-179-2437

Find complete technical information, availability, and procurement data for: 5305-01-179-2437
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-179-2437

Item Name Code

01852

Assigment Date

05/16/1984 (42 years ago)

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

0.230 inches minimum and 0.250 inches maximum thread length, flat chamfer head style, right-hand thread direction, 3a thread class, 0.625 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: 3a
Thread Direction: right-hand
Thread Length: 0.230 inches minimum and 0.250 inches maximum
Fastener Length: 0.625 inches nominal
Head Style: flat chamfer
Head Diameter: 0.270 inches nominal
Head Height: 0.159 inches minimum and 0.164 inches maximum
First Diameter From Head: 0.125 inches nominal
Distance From Largest Bearing Surface Of Head To End Of First Diameter: 0.385 inches nominal
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.164 inches
Width Across Flats: 0.141 inches nominal
Thread Quantity Per Inch: 32
Minimum Tensile Strength: 80000 pounds per square inch
Hardness Rating: 80.0 rockwell b minimum overall
Minimum Yield Strength: 30000 pounds per square inch
Externally Relieved Body Diameter Quantity: 1
Material: steel comp 302 or steel comp 303 or steel comp 304 or steel comp 305 or steel comp 316 overall
Material Document And Classification: 66 fed std all material responses overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response overall
Thread Series Designator: unc

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
6080608	Externally Relieved Body Screw

FAQs

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

What is the FSCG of the NSN 5305-01-179-2437?

The FSCG of the NSN 5305-01-179-2437 is 5305

Does the NSN 5305-01-179-2437 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-179-2437 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 5305-01-179-2437 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-179-2437 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 5305-01-179-2437 was assigned to the Federal Catalog?

It was assigned 42 years ago, on Wed, May 16, 1984