20C3659-1

View detailed technical data, stock status, and sourcing information for: 20C3659-1
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-948-1148

Item Name Code

01852

Assigment Date

03/30/1966 (60 years ago)

2a thread class, right-hand thread direction, knurled no. 1 head style, 0.844 inches nominal fastener length, 0.280 inches nominal 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: 0.280 inches nominal
Fastener Length: 0.844 inches nominal
Head Style: knurled no. 1
Head Diameter: 0.307 inches minimum and 0.317 inches maximum
Head Height: 0.190 inches nominal
First Diameter From Head: 0.090 inches minimum and 0.100 inches maximum
Distance From Largest Bearing Surface Of Head To End Of First Diameter: 0.564 inches nominal
Internal Drive Style: slot
Nominal Thread Diameter: 0.138 inches
Thread Quantity Per Inch: 32
Externally Relieved Body Diameter Quantity: 1
Material: steel comp 303 overall
Material Document And Classification: astm a582 assn std single material response overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: mil-f-14072,finish e300 mil spec single treatment response overall
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Below is a list of NSNs that have been officially superseded by this NSN: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
5305-01-133-7175	No Name Available	04/01/1989
5305-01-581-5251	No Name Available	01/01/2023

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
10689305-2	Externally Relieved Body Screw
1121-577	Externally Relieved Body Screw
20C3659-1	Externally Relieved Body Screw
6133-SS-0632-7	Externally Relieved Body Screw
6133SS0632	Externally Relieved Body Screw
6133SS0632-7	Externally Relieved Body Screw

FAQs

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

What is the FSCG of the NSN 5305-00-948-1148?

The FSCG of the NSN 5305-00-948-1148 is 5305

Does the NSN 5305-00-948-1148 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-948-1148 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 5305-00-948-1148 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-00-948-1148 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 5305-00-948-1148 was assigned to the Federal Catalog?

It was assigned 60 years ago, on Wed, Mar 30, 1966