MS28774-439

View detailed technical data, stock status, and sourcing information for: MS28774-439
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5330 Packing and Gasket Materials

National Stock Number

5330-01-045-2491

Item Name Code

13706

Assigment Date

07/29/1977 (49 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.

square/rectangular cross-sectional shape style, scarf-peripheral retainer joint type, 0.106 inches minimum and 0.110 inches maximum cross-sectional height, 6.738 inches nominal center hole diameter, 6.972 inches minimum and 6.976 inches maximum peripheral 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: square/rectangular
Cross-Sectional Height: 0.106 inches minimum and 0.110 inches maximum
Center Hole Diameter: 6.738 inches nominal
Peripheral Diameter: 6.972 inches minimum and 6.976 inches maximum
Joint Type: scarf-peripheral retainer
Cut Type: diagonal overall
Material: plastic polytetrafluoroethylene overall
Material Document And Classification: mil-r-8791 mil spec single material response overall

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
7-3814PC54	Packing Retainer
AS7891-439	Packing Retainer
MS28774-439	Packing Retainer

FAQs

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

What is the FSCG of the NSN 5330-01-045-2491?

The FSCG of the NSN 5330-01-045-2491 is 5330

Does the NSN 5330-01-045-2491 have a Schedule B code assigned?

Yes, the Schedule B code is 3926904500

Does NSN 5330-01-045-2491 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 5330-01-045-2491 contain precious materials?

Precious metal content is unknown

Does NSN 5330-01-045-2491 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 5330-01-045-2491 was assigned to the Federal Catalog?

It was assigned 49 years ago, on Fri, Jul 29, 1977