5305-00-980-5251

Find complete technical information, availability, and procurement data for: 5305-00-980-5251
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-980-5251

Item Name Code

06657

Assigment Date

10/14/1966 (59 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.

flat countersunk head style, right-hand thread direction, 0.276 inches minimum thread length, 3a thread class, 0.401 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: 0.276 inches minimum
Fastener Length: 0.401 inches nominal
Head Style: flat countersunk
Head Diameter: 0.297 inches minimum and 0.302 inches maximum
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.190 inches
Thread Quantity Per Inch: 32
Minimum Tensile Strength: 160000 pounds per square inch
Hardness Rating: 36.0 rockwell c minimum and 40.0 rockwell c maximum
Countersink Angle: 100.0 degrees nominal
Screw Material: steel
Screw Surface Treatment: cadmium and chromate or zinc and chromate
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:

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GB510L3-2	Machine Screw
HT239PB3-2	Machine Screw
HT8043-3-2	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-00-980-5251?

The FSCG of the NSN 5305-00-980-5251 is 5305

Does the NSN 5305-00-980-5251 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-980-5251 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 5305-00-980-5251 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-00-980-5251 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 5305-00-980-5251 was assigned to the Federal Catalog?

It was assigned 59 years ago, on Fri, Oct 14, 1966