1788271-1

View detailed technical data, stock status, and sourcing information for: 1788271-1
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-245-2507

Item Name Code

06672

Assigment Date

07/11/1969 (57 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, 0.625 inches nominal fastener length, right-hand thread direction, headless (setscrew) head style, 0.625 inches minimum 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: 0.625 inches minimum
Fastener Length: 0.625 inches nominal
Head Style: headless (setscrew)
Locking Feature: pellet threads
Point Style: cup
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.312 inches
Width Across Flats: 0.156 inches nominal
Thread Quantity Per Inch: 18
Hardness Rating: 28.0 rockwell c minimum and 34.0 rockwell c maximum overall
Material: steel overall
Material Document And Classification: fed std 66,comp 4130 fed std single material response or mil-s-16974,grade 4130 mil spec single material response overall
Surface Treatment: zinc overall
Surface Treatment Document And Classification: qq-z-325,ty 2,cl 2 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
1788271-1	Setscrew
BUWEPSDWG1788271-1	Setscrew

FAQs

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

What is the FSCG of the NSN 5305-00-245-2507?

The FSCG of the NSN 5305-00-245-2507 is 5305

Does the NSN 5305-00-245-2507 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-245-2507 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 5305-00-245-2507 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-245-2507 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 5305-00-245-2507 was assigned to the Federal Catalog?

It was assigned 57 years ago, on Fri, Jul 11, 1969