423-140

View detailed technical data, stock status, and sourcing information for: 423-140
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-260-7705

Item Name Code

18257

Assigment Date

08/05/1987 (39 years ago)

An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. Excludes:bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.

3.5 millimeters nominal head height, 40.0 millimeters nominal fastener length, 38.4 millimeters minimum and 40.0 millimeters maximum thread length, hexagon 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 Direction: right-hand
Thread Length: 38.4 millimeters minimum and 40.0 millimeters maximum
Fastener Length: 40.0 millimeters nominal
Head Style: hexagon
Head Height: 3.5 millimeters nominal
Width Between Flats: 8.0 millimeters nominal
Nominal Thread Diameter: 5.0 millimeters
Minimum Tensile Strength: 116000 pounds per square inch
Hardness Rating: 23.0 rockwell c minimum and 32.0 rockwell c maximum overall
Thread Pitch In Millimeters: 0.8
External Thread Tolerance Class: 6g
Color: red overall
Material: steel property class 8.8 overall
Surface Treatment: dichromate zinc overall
Thread Series Designator: m

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
423-140	Hexagon Head Cap Screw
6K.HALSKR M5 X 40-8.8	Hexagon Head Cap Screw
908-042	Hexagon Head Cap Screw
983886 IT-7	Hexagon Head Cap Screw
M5 X 40-8.8 DIN933	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-260-7705?

The FSCG of the NSN 5305-01-260-7705 is 5305

Does the NSN 5305-01-260-7705 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-260-7705 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 5305-01-260-7705 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-260-7705 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 5305-01-260-7705 was assigned to the Federal Catalog?

It was assigned 39 years ago, on Wed, Aug 5, 1987