5305-01-166-6139

Find complete technical information, availability, and procurement data for: 5305-01-166-6139
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-166-6139

Item Name Code

29294

Assigment Date

11/15/1983 (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.

3a thread class, crowned hexagon head style, 1.853 inches minimum and 1.873 inches maximum fastener length, 0.306 inches minimum and 0.357 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: 0.306 inches minimum and 0.357 inches maximum
Fastener Length: 1.853 inches minimum and 1.873 inches maximum
Head Style: crowned hexagon
Head Height: 0.157 inches minimum and 0.172 inches maximum
Width Between Flats: 0.492 inches minimum and 0.502 inches maximum
Grip Diameter: 0.3112 inches minimum and 0.3117 inches maximum
Shank Unthreaded Hole Diameter: 0.076 inches minimum and 0.086 inches maximum first hole
Internal Drive Style: slot
Nominal Thread Diameter: 0.312 inches
Grip Length: 1.375 inches minimum and 1.391 inches maximum
Thread Quantity Per Inch: 24
Distance From Head Largest Bearing Surface To Shank Hole Center: 1.677 inches minimum and 1.697 inches maximum first hole
Surface Finish: 32.0 microinches bearing surface of head
Surface Finish: 32.0 microinches grip
Special Features: retaining element in shank
Material: steel comp xm-13 overall
Material Document And Classification: ams 5629 assn std single material response overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: qq-p-35 fed spec 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
MS3369B522	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-166-6139?

The FSCG of the NSN 5305-01-166-6139 is 5305

Does the NSN 5305-01-166-6139 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-166-6139 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 5305-01-166-6139 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-166-6139 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 5305-01-166-6139 was assigned to the Federal Catalog?

It was assigned 42 years ago, on Tue, Nov 15, 1983