5305-01-398-4030

Find complete technical information, availability, and procurement data for: 5305-01-398-4030
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-398-4030

Item Name Code

18257

Assigment Date

11/02/1994 (31 years ago)

A thin flat metal or plastic item of various peripheral shapes having a solid or laminated cross-section. It is designed to maintain a predetermined distance between two surfaces. For round items without a hole and having a solid rectangular cross-section use disk, solid, plain. Items with either (1) a solid (not laminated) cross-section, or (2) a non-separable laminated cross-section with one hole centrally located, must have a thickness less than 0.006 inch (0.152 mm) for items less than 1/4 inch (6.35 mm) outside diameter or shortest distance across peripheral flats, and less than 0.016 inch (0.406 mm) for items 1/4 inch (6.35 mm) or more outside diameter, or shortest distance across peripheral flats. For items with thickness greater than those indicated above, see spacer, plate; washer, flat and spacer, ring. When thickness and/or outside diameter or shortest distance across peripheral flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance. See also shim stock, laminated; shim stock assortment, gasket; and bearing, washer, thrust.

2a thread class, hexagon extended washer head style, 1.500 inches nominal fastener length, right-hand thread direction, 0.750 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: 0.750 inches nominal
Fastener Length: 1.500 inches nominal
Head Style: hexagon extended washer
Head Height: 0.270 inches minimum and 0.295 inches maximum
Width Between Flats: 0.552 inches minimum and 0.562 inches maximum
Extended Washer Diameter: 0.720 inches minimum and 0.780 inches maximum
Extended Washer Thickness: 0.035 inches minimum and 0.065 inches maximum
Nominal Thread Diameter: 0.375 inches
Thread Quantity Per Inch: 16
Minimum Tensile Strength: 160000 pounds per square inch
Special Features: two slots 180 degrees apart, 0.090 in. nom deep, 0.120 in. nom wide, 0.750 inm mom lg from end opposite the head
Material: steel overall
Surface Treatment: zinc overall
Surface Treatment Document And Classification: astm b633, sc 2, type 1 assn std single treatment response overall
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
88-22745	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-398-4030?

The FSCG of the NSN 5305-01-398-4030 is 5305

Does the NSN 5305-01-398-4030 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-398-4030 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 5305-01-398-4030 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-398-4030 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 5305-01-398-4030 was assigned to the Federal Catalog?

It was assigned 31 years ago, on Wed, Nov 2, 1994