5305-01-263-8493

Find complete technical information, availability, and procurement data for: 5305-01-263-8493
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-263-8493

Item Name Code

16282

Assigment Date

09/20/1987 (38 years ago)

An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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 not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see bolt, shear. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see bolt, machine.

3a thread class, right-hand thread direction, 0.435 inches minimum and 0.565 inches maximum fastener length, flat countersunk head style, 0.253 inches minimum and 0.454 inches maximum thread 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: 0.253 inches minimum and 0.454 inches maximum
Fastener Length: 0.435 inches minimum and 0.565 inches maximum
Head Style: flat countersunk
Head Diameter: 0.456 inches minimum and 0.508 inches maximum
Locking Feature: patch or pellet or strip threads
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 160000 pounds per square inch
Hardness Rating: 36.0 rockwell c minimum and 40.0 rockwell c maximum fastener
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Part Name Assigned By Controlling Agency: navy special project
Material: plastic locking feature
Material: steel comp e4340 or steel comp 8740 fastener
Material Document And Classification: mil-f-18240 mil spec single material response locking feature
Material Document And Classification: mil-s-5000 mil spec 1st material response or mil-s-6049 mil spec 2nd material response or ams 6322 assn std 2nd material response fastener
Surface Treatment: cadmium and chromate fastener
Surface Treatment Document And Classification: qq-p-416,type 2,class 2 fed spec single treatment response fastener
Thread Series Designator: unjf
Specification/Standard Data: 80205-nas7104 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:

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NAS7104L2	Socket Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-263-8493?

The FSCG of the NSN 5305-01-263-8493 is 5305

Does the NSN 5305-01-263-8493 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-263-8493 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 5305-01-263-8493 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-263-8493 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 5305-01-263-8493 was assigned to the Federal Catalog?

It was assigned 38 years ago, on Sun, Sep 20, 1987