0645-0428-18UDK

View detailed technical data, stock status, and sourcing information for: 0645-0428-18UDK
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-139-6941

Item Name Code

16282

Assigment Date

09/10/1971 (54 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes:items with bevel (conical) heads. See bolt, internal wrenching. Excludes:screw, shoulder; and screw, machine.

1.000 inches minimum and 1.071 inches maximum thread length, 3a thread class, flat chamfer head style, right-hand thread direction, 1.109 inches minimum and 1.156 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: 3a
Thread Direction: right-hand
Thread Length: 1.000 inches minimum and 1.071 inches maximum
Fastener Length: 1.109 inches minimum and 1.156 inches maximum
Head Style: flat chamfer
Head Diameter: 0.365 inches minimum and 0.375 inches maximum
Head Height: 0.244 inches minimum and 0.250 inches maximum
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.250 inches
Width Across Flats: 0.187 inches minimum and 0.190 inches maximum
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 160000 pounds per square inch
Hardness Rating: 36.0 rockwell c minimum and 43.0 rockwell c maximum overall
Material: steel 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
0645-0428-18UDK	Socket Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-139-6941?

The FSCG of the NSN 5305-00-139-6941 is 5305

Does the NSN 5305-00-139-6941 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-139-6941 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 5305-00-139-6941 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-139-6941 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 5305-00-139-6941 was assigned to the Federal Catalog?

It was assigned 54 years ago, on Fri, Sep 10, 1971