LS4978

View detailed technical data, stock status, and sourcing information for: LS4978
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Federal Supply Group

Metal Bars, Sheets, and Shapes

Federal Supply Classification

9540 Nonferrous Base Metal Structural Shapes

National Stock Number

9540-00-027-9190

Item Name Code

37018

Assigment Date

01/01/1963 (63 years ago)

A structural shape fabricated from a ferrous or nonferrous material and resembles the following cross-sectional forms: for the letter h, both flanges of the h section are equal or longer than the width measured along the axis of the web; for the letter i, a 16 2/3 percent slope on the inside face of the ferrous type flange, either one or both of the nonferrous type flanges are shorter than the length measured along the axis of the web; for the letters t and z, on nonferrous type, the web is usually at right angles to the flanges. Letter h section may have a maximum of 5 percent slope on the inside face of the flanges.

4.750 inches nominal overall height, 0.078 inches nominal right side top flange thickness, extruded fabrication method, 0.396 feet nominal length, 0.078 inches nominal left side top flange thickness

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Fabrication Method: extruded
Overall Height: 4.750 inches nominal
Length: 0.396 feet nominal
Left Side Top Flange Thickness: 0.078 inches nominal
Right Side Top Flange Thickness: 0.078 inches nominal
Basic Shape Style: t shape
Leg Thickness: 0.078 inches nominal
Left Side Top Flange Distance To Center Of Both Flanges: 0.950 inches nominal
Right Side Top Flange Distance To Center Of Both Flanges: 0.950 inches nominal
Fillet Radius Where Top Left Flange Joins Web Flange/Leg: 0.940 inches nominal
Fillet Radius Where Top Right Flange Joins Web Flange/Leg: 0.940 inches nominal
Top Flange Width: 1.900 inches nominal
Weight Per Unit Measure: 0.0015 pounds per linear foot
First Tip Style: square w/ inner and outer corner radii
First Tip Inner Radius: 0.031 inches nominal
First Tip Outer Radius: 0.031 inches nominal
Second Tip Relationship To First Tip: identical
Third Tip Relationship To Preceding Tips: identical w/first tip
Right Top Inside Angle: 90.0 degrees nominal
Left Top Inside Angle: 90.0 degrees nominal
Material: aluminum alloy

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
LS4978	Structural Beam

FAQs

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

What is the FSCG of the NSN 9540-00-027-9190?

The FSCG of the NSN 9540-00-027-9190 is 9540

Does NSN 9540-00-027-9190 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 9540-00-027-9190 contain precious materials?

Precious metal content is unknown

Does NSN 9540-00-027-9190 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 9540-00-027-9190 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963