7521921

View detailed technical data, stock status, and sourcing information for: 7521921
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5330 Packing and Gasket Materials

National Stock Number

5330-00-752-1921

Item Name Code

04522

Assigment Date

01/01/1962 (64 years ago)

An item designed to fit over a packing gland by mating with a surface of a second part which together will retain into a narrow groove or confined space the packing, preformed or o-ring, or an item designed to fit over a rod or shaft, to mate with a stuffing box to confine packing material. It may function as a static or dynamic seal retainer with the packing located on, around, or in the centerline direction of the rod or shaft axis. It may have holes or joints for mounting, be threaded or unthreaded. See also packing nut and packing nut, stuffing tube.

4.000 inches nominal overall length, solid single or composition cross-sectional shape style, 2.906 inches nominal overall width, 0.375 inches nominal outside corner radius, 0.406 inches nominal hole diameter

Product Characteristics

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

Cross-Sectional Shape Style: solid single or composition
Hole Diameter: 0.406 inches nominal
Overall Length: 4.000 inches nominal
Overall Width: 2.906 inches nominal
Outside Corner Radius: 0.375 inches nominal
Center To Center Distance Between Bolt Holes Along Width: 2.094 inches nominal
Center To Center Distance Between Bolt Holes Along Length: 3.250 inches nominal
Outside Edge To Bolt Hole Center Distance Along Length: 0.375 inches nominal
Cross-Sectional Thickness: 0.031 inches nominal
Material: asbestos and rubber butadiene-acrylonitrile class nbr overall
Material Document And Classification: mil-g-12803,+1141-a mil spec single material response overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
2940-00-345-5734	No Name Available	01/01/1963

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
1378A6	Gasket
7521921	Gasket
913614	Gasket

FAQs

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

What is the FSCG of the NSN 5330-00-752-1921?

The FSCG of the NSN 5330-00-752-1921 is 5330

Does NSN 5330-00-752-1921 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 5330-00-752-1921 contain precious materials?

Precious metal content is unknown

Does NSN 5330-00-752-1921 contain hazardous materials?

Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of fed std 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.

When the NSN 5330-00-752-1921 was assigned to the Federal Catalog?

It was assigned 64 years ago, on Mon, Jan 1, 1962