5305-01-163-1981

Find complete technical information, availability, and procurement data for: 5305-01-163-1981
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-163-1981

Item Name Code

22846

Assigment Date

09/29/1983 (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.

0.250 inches nominal thread length, 2a thread class, right-hand thread direction, flat chamfer head style, 0.438 inches minimum and 0.440 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: 2a
Thread Direction: right-hand
Thread Length: 0.250 inches nominal
Fastener Length: 0.438 inches minimum and 0.440 inches maximum
Head Style: flat chamfer
Head Diameter: 0.375 inches nominal
Head Height: 0.187 inches nominal
Shoulder Diameter: 0.2485 inches minimum and 0.2495 inches maximum first shoulder
Shoulder Length: 0.188 inches minimum and 0.190 inches maximum first shoulder
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.190 inches
Width Across Flats: 0.125 inches nominal
Thread Quantity Per Inch: 32
Chamfer Angle: 45.0 degrees nominal
Shoulder Shape: round first shoulder
Material: steel comp 303 overall
Thread Series Designator: unf

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
0N295571	Shoulder Screw
DBS-A1-18	Shoulder Screw

FAQs

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

What is the FSCG of the NSN 5305-01-163-1981?

The FSCG of the NSN 5305-01-163-1981 is 5305

Does the NSN 5305-01-163-1981 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-163-1981 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 5305-01-163-1981 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-163-1981 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 5305-01-163-1981 was assigned to the Federal Catalog?

It was assigned 42 years ago, on Thu, Sep 29, 1983