5305-01-388-1821

Find complete technical information, availability, and procurement data for: 5305-01-388-1821
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-388-1821

Item Name Code

06657

Assigment Date

03/23/1994 (32 years ago)

A hard case, usually made of plastic or other similar material and containing a flat, hard disk generally made of metal, glass, or the like with a center hole and coated with magnetically sensitive material, usually iron oxide. The magnetic disk is used as a storage medium on which information can be magnetically stored and retrieved. The case is designed to protect the enclosed magnetic disk from contaminants and other physical damage and mounts on the spindle of a disk drive.

2a thread class, flat countersunk undercut head style, 0.156 inches nominal fastener length, right-hand thread direction, 0.086 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: 0.086 inches nominal
Fastener Length: 0.156 inches nominal
Head Style: flat countersunk undercut
Head Diameter: 0.195 inches minimum and 0.225 inches maximum
Head Height: 0.025 inches minimum and 0.030 inches maximum
Internal Drive Style: slot
Nominal Thread Diameter: 0.112 inches
Features Provided: o ring
Thread Quantity Per Inch: 40
Countersink Angle: 100.0 degrees nominal
Part Name Assigned By Controlling Agency: navy special project
Screw Material: steel comp 302
Screw Material Document And Classification: qq-s-763 cond a fed spec single material response
Screw Surface Treatment: passivate
Screw Surface Treatment Document And Classification: qq-p-35 ty 6 fed spec single treatment response
Special Features: head has three slotted drives equally spaced 60.0 deg. apart. o-ring matl: kalrez o-ring,compound 4079
Thread Series Designator: unc

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
845-6641063PN2	Machine Screw
845-6641066	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-388-1821?

The FSCG of the NSN 5305-01-388-1821 is 5305

Does the NSN 5305-01-388-1821 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-388-1821 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 5305-01-388-1821 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-388-1821 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 5305-01-388-1821 was assigned to the Federal Catalog?

It was assigned 32 years ago, on Wed, Mar 23, 1994