2-56X.188

View detailed technical data, stock status, and sourcing information for: 2-56X.188
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-280-5749

Item Name Code

16282

Assigment Date

06/13/1988 (38 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.

3a thread class, 0.131 inches minimum and 0.203 inches maximum thread length, 0.173 inches minimum and 0.203 inches maximum fastener length, pan head style, 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: 0.131 inches minimum and 0.203 inches maximum
Fastener Length: 0.173 inches minimum and 0.203 inches maximum
Head Style: pan
Head Diameter: 0.154 inches minimum and 0.164 inches maximum
Head Height: 0.038 inches minimum and 0.046 inches maximum
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.086 inches
Width Across Flats: 0.050 inches minimum and 0.051 inches maximum
Thread Quantity Per Inch: 56
Material: steel comp 303 overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response overall
Thread Series Designator: unc

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
2-56X.188	Socket Head Cap Screw
885C615P0112	Socket Head Cap Screw
885C615P112	Socket Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-280-5749?

The FSCG of the NSN 5305-01-280-5749 is 5305

Does the NSN 5305-01-280-5749 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-280-5749 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 5305-01-280-5749 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-280-5749 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 5305-01-280-5749 was assigned to the Federal Catalog?

It was assigned 38 years ago, on Mon, Jun 13, 1988