6242857-57

View detailed technical data, stock status, and sourcing information for: 6242857-57
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-309-7045

Item Name Code

16282

Assigment Date

10/21/1989 (36 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.

right-hand thread direction, 1.125 inches minimum thread length, flat chamfer head style, 1.250 inches nominal fastener length, 3a thread class

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: 1.125 inches minimum
Fastener Length: 1.250 inches nominal
Head Style: flat chamfer
Head Diameter: 0.468 inches nominal
Head Height: 0.312 inches nominal
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.312 inches
Width Across Flats: 0.250 inches nominal
Thread Quantity Per Inch: 24
Minimum Tensile Strength: 125000 pounds per square inch
Minimum Yield Strength: 80000 pounds per square inch
Special Features: knurled head optional
Color: gray/grey overall
Material: steel corrosion resisting overall
Surface Treatment: ceramic overall
Surface Treatment Document And Classification: mil-c-81751,ty 1 cl 4 mil spec single treatment response 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
2994949-57	Socket Head Cap Screw
6242857-57	Socket Head Cap Screw
KS812-524-1.25	Socket Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-309-7045?

The FSCG of the NSN 5305-01-309-7045 is 5305

Does the NSN 5305-01-309-7045 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-309-7045 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 5305-01-309-7045 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-309-7045 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 5305-01-309-7045 was assigned to the Federal Catalog?

It was assigned 36 years ago, on Sat, Oct 21, 1989