0.250-20UNC-2AX1.000LG NICU

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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-490-5590

Item Name Code

06657

Assigment Date

10/01/2001 (24 years ago)

A tubular shaped item with a round or hexagon peripheral shape having two flat bearing surfaces perpendicular to the axis of the centrally located hole. It is designed to maintain a predetermined distance between assembled parts. The item may be with or without flange(s) of any peripheral shape. The overall length must exceed 25 percent of the outside diameter or distance across peripheral flats of the body. (when the length, outside diameter, and/or distance across peripheral flats are designed as a tolerance, the maximum dimension will be used to determine compliance). For items having other than a round or hexagon peripheral shape, see spacer, plate. Excludes:items with lubricating features, see bearing, sleeve and bushing, sleeve. See also bushing, tapered; spacer, ring; washer, flat; and washer, (as modified).

right-hand thread direction, 1.000 inches nominal fastener length, cross recess type 1 internal drive style, 2a thread class, flat countersunk 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
Fastener Length: 1.000 inches nominal
Head Style: flat countersunk
Internal Drive Style: cross recess type 1
End Item Identification: valve, globe
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 20
Screw Material: nickel alloy
Special Features: part of logistic escape trunk fairing assembly
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-2AX1.000LG NICU	Machine Screw
167-6406424 FIND 73	Machine Screw
563-7067896-37	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-490-5590?

The FSCG of the NSN 5305-01-490-5590 is 5305

Does the NSN 5305-01-490-5590 have a Schedule B code assigned?

Yes, the Schedule B code is 7508900000

Does NSN 5305-01-490-5590 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 5305-01-490-5590 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-490-5590 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 5305-01-490-5590 was assigned to the Federal Catalog?

It was assigned 24 years ago, on Mon, Oct 1, 2001