1/4-20UNC-2X3/4

View detailed technical data, stock status, and sourcing information for: 1/4-20UNC-2X3/4
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-119-4266

Item Name Code

06657

Assigment Date

09/24/1981 (44 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.

right-hand thread direction, 0.725 inches minimum and 0.750 inches maximum thread length, flat countersunk head style, 0.750 inches nominal fastener length, 2a thread class

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: 0.725 inches minimum and 0.750 inches maximum
Fastener Length: 0.750 inches nominal
Head Style: flat countersunk
Head Diameter: 0.452 inches minimum and 0.507 inches maximum
Internal Drive Style: slot
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 20
Countersink Angle: 80.0 degrees minimum and 82.0 degrees maximum
Screw Material: nickel alloy 400
Screw Material Document And Classification: qq-n-281 cl a fed spec single material response
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
1/4-20UNC-2X3/4	Machine Screw
2477283-8	Machine Screw
2477283-F-8	Machine Screw
400 5489326 REV-ITEM 6	Machine Screw
62788AX	Machine Screw
6744243-6	Machine Screw
6809969-84	Machine Screw
M8830024	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-119-4266?

The FSCG of the NSN 5305-01-119-4266 is 5305

Does the NSN 5305-01-119-4266 have a Schedule B code assigned?

Yes, the Schedule B code is 7508900000

Does NSN 5305-01-119-4266 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 5305-01-119-4266 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-119-4266 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 5305-01-119-4266 was assigned to the Federal Catalog?

It was assigned 44 years ago, on Thu, Sep 24, 1981