18121B241

View detailed technical data, stock status, and sourcing information for: 18121B241
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-579-2136

Item Name Code

06657

Assigment Date

01/01/1963 (63 years ago)

2a thread class, right-hand thread direction, 0.750 inches nominal fastener length, fillister head style, 0.688 inches minimum and 0.750 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: 0.688 inches minimum and 0.750 inches maximum
Fastener Length: 0.750 inches nominal
Head Style: fillister
Head Diameter: 0.208 inches minimum and 0.226 inches maximum
Head Height: 0.089 inches minimum and 0.096 inches maximum
Hole Diameter: 0.046 inches nominal
Internal Drive Style: slot
Nominal Thread Diameter: 0.138 inches
Hole Quantity: 1
Thread Quantity Per Inch: 32
Minimum Tensile Strength: 55000 pounds per square inch
Screw Material: steel
Screw Material Document And Classification: 66 fed std single material response
Screw Surface Treatment: cadmium and chromate
Screw Surface Treatment Document And Classification: qq-p-416,type 2,class 3 fed spec single treatment response
Head Hole Configuration Style: round
Thread Series Designator: unc

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5305-00-010-0701	No Name Available	08/01/1982
5305-00-013-1912	No Name Available	01/01/1980
5305-00-141-4874	No Name Available	05/20/1988
5305-00-582-8128	No Name Available	12/01/1982
5305-00-614-0265	No Name Available	01/01/1963
5305-00-637-5799	No Name Available	01/01/1983
5305-00-660-2531	No Name Available	09/24/2012
5305-00-682-5519	No Name Available	02/07/1980
5305-00-714-0128	No Name Available	02/01/1983

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
10125395	Machine Screw
18121B241	Machine Screw
MS35263-32	Machine Screw
MS35265-32	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-00-579-2136?

The FSCG of the NSN 5305-00-579-2136 is 5305

Does the NSN 5305-00-579-2136 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-579-2136 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 5305-00-579-2136 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-00-579-2136 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 5305-00-579-2136 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963