LK21090-0630

View detailed technical data, stock status, and sourcing information for: LK21090-0630
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-059-7438

Item Name Code

16282

Assigment Date

04/15/1978 (48 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes:items with bevel (conical) heads. See bolt, internal wrenching. Excludes:screw, shoulder; and screw, machine.

1.438 inches minimum and 1.500 inches maximum fastener length, 2a thread class, 1.376 inches minimum and 1.500 inches maximum thread length, right-hand thread direction, pan head style

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: 1.376 inches minimum and 1.500 inches maximum
Fastener Length: 1.438 inches minimum and 1.500 inches maximum
Head Style: pan
Head Diameter: 0.256 inches minimum and 0.270 inches maximum
Head Height: 0.087 inches minimum and 0.097 inches maximum
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.138 inches
Thread Quantity Per Inch: 32
Minimum Tensile Strength: 60000 pounds per square inch
Material: steel overall
Material Document And Classification: 66 fed std 1st material response or qq-s-637 fed spec 2nd material response overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416 ty2 cl3 fed spec 1st treatment response or mil-81562 ty2 cl3 mil spec 2nd treatment response overall
Thread Series Designator: unc
Nondefinitive Spec/Std Data: 3 type and 9c style

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
LK21090-0630	Socket Head Cap Screw
MS21090-0630	Socket Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-059-7438?

The FSCG of the NSN 5305-01-059-7438 is 5305

Does the NSN 5305-01-059-7438 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-059-7438 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 5305-01-059-7438 contain precious materials?

Precious metal content is unknown

Does NSN 5305-01-059-7438 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 5305-01-059-7438 was assigned to the Federal Catalog?

It was assigned 48 years ago, on Sat, Apr 15, 1978