18312ADX

View detailed technical data, stock status, and sourcing information for: 18312ADX
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-990-1347

Item Name Code

06657

Assigment Date

01/01/1962 (64 years ago)

flat countersunk head style, 2a thread class, right-hand thread direction, 1.188 inches minimum and 1.250 inches maximum fastener length, 0.935 inches minimum and 1.097 inches maximum 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: 2a
Thread Direction: right-hand
Thread Length: 0.935 inches minimum and 1.097 inches maximum
Fastener Length: 1.188 inches minimum and 1.250 inches maximum
Head Style: flat countersunk
Head Diameter: 0.452 inches minimum and 0.507 inches maximum
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 60000 pounds per square inch
Countersink Angle: 80.0 degrees minimum and 82.0 degrees maximum
Screw Material: steel
Screw Material Document And Classification: 66 fed std single material response or astma108 assn std single material response
Screw Surface Treatment: cadmium and chromate
Screw Surface Treatment Document And Classification: qq-p-416,ty 2,cl 3 fed spec single treatment response or mil-c-81562,ty 2 cl 3 mil spec single treatment response
Thread Series Designator: unc
Nondefinitive Spec/Std Data: 3 type and 2c style

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5305-00-011-3995	No Name Available	02/01/1984
5305-00-013-3783	No Name Available	09/01/1982
5305-00-297-8219	Machine Screw	07/01/2025
5305-00-682-5439	No Name Available	10/01/1982
5305-01-197-3256	No Name Available	10/01/1986

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
18312ADX	Machine Screw
5305009901347	Machine Screw
MS35190-292	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-00-990-1347?

The FSCG of the NSN 5305-00-990-1347 is 5305

Does the NSN 5305-00-990-1347 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-990-1347 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 5305-00-990-1347 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-990-1347 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 5305-00-990-1347 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962