0.250-20UNC-3AX0.500 NICU

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-412-4895

Item Name Code

06672

Assigment Date

04/20/1995 (31 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.

0.490 inches minimum and 0.500 inches maximum fastener length, right-hand thread direction, 0.500 inches maximum thread length, headless (setscrew) head style, 3a 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: 3a
Thread Direction: right-hand
Thread Length: 0.500 inches maximum
Fastener Length: 0.490 inches minimum and 0.500 inches maximum
Head Style: headless (setscrew)
Locking Feature: patch or pellet or strip threads
Point Style: half dog
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.250 inches
Width Across Flats: 0.125 inches nominal
Thread Quantity Per Inch: 20
Material: nickel alloy r-405 fastener
Material: plastic polyamide (nylon) locking feature
Material Document And Classification: qq-n-281 cl b form 1 cond hf fed spec single material response fastener
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
0.250-20UNC-3AX 0.500 NICU	Setscrew
0.250-20UNC-3AX0.500 NICU	Setscrew
122-5486623 PC13	Setscrew
150-6404868-39	Setscrew
211055631	Setscrew

FAQs

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

What is the FSCG of the NSN 5305-01-412-4895?

The FSCG of the NSN 5305-01-412-4895 is 5305

Does the NSN 5305-01-412-4895 have a Schedule B code assigned?

Yes, the Schedule B code is 7508900000

Does NSN 5305-01-412-4895 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 5305-01-412-4895 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-412-4895 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 5305-01-412-4895 was assigned to the Federal Catalog?

It was assigned 31 years ago, on Thu, Apr 20, 1995