258B

View detailed technical data, stock status, and sourcing information for: 258B
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Federal Supply Group

Pumps and Compressors

Federal Supply Classification

4310 Compressors and Vacuum Pumps

National Stock Number

4310-00-131-2912

Item Name Code

11459

Assigment Date

01/01/1961 (65 years ago)

A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes:packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.

beveled face scraper, ventilated oil control cross-sectional shape style, 0.2900 inches minimum and 0.3050 inches maximum radial wall thickness, concentric ring style, 0.3110 inches nominal overall width, 8.875 inches standard bore 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: beveled face scraper, ventilated oil control
Ring Style: concentric
Radial Wall Thickness: 0.2900 inches minimum and 0.3050 inches maximum
Overall Width: 0.3110 inches nominal
Standard Bore Diameter: 8.875 inches
Joint Style: vertical joint
Oil Passage Type And Quantity: 10 slot horizontally through ring
Material: iron 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
107013PC229	Piston Ring
107027PC229	Piston Ring
107028PC229	Piston Ring
107413PC229	Piston Ring
107427PC229	Piston Ring
107428PC229	Piston Ring
107513PC229	Piston Ring
107527PC229	Piston Ring
107528PC229	Piston Ring
110913PC229	Piston Ring
110928PC229	Piston Ring
111113PC229	Piston Ring
111127PC229	Piston Ring
111128PC229	Piston Ring
111213PC229	Piston Ring
111227PC229	Piston Ring
111228PC229	Piston Ring
113413PC229	Piston Ring
113427PC229	Piston Ring
113428PC229	Piston Ring
114713PC229	Piston Ring
114727PC229	Piston Ring
114728PC229	Piston Ring
116313PC229	Piston Ring
116327PC229	Piston Ring
116328PC229	Piston Ring
116613PC229	Piston Ring
116627PC229	Piston Ring
116628PC229	Piston Ring
116713PC229	Piston Ring
116727PC229	Piston Ring
116728PC229	Piston Ring
116828PC229	Piston Ring
116913PC229	Piston Ring
116927PC229	Piston Ring
116928PC229	Piston Ring
117028PC229	Piston Ring
117513PC229	Piston Ring
117527PC229	Piston Ring
117528PC229	Piston Ring
118213PC229	Piston Ring
118227PC229	Piston Ring
118228PC229	Piston Ring
118828PC299	Piston Ring
119628PC229	Piston Ring
119728PC229	Piston Ring
258B	Piston Ring

FAQs

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

What is the FSCG of the NSN 4310-00-131-2912?

The FSCG of the NSN 4310-00-131-2912 is 4310

Does the NSN 4310-00-131-2912 have a Schedule B code assigned?

Yes, the Schedule B code is 8414902095

Does NSN 4310-00-131-2912 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 4310-00-131-2912 contain precious materials?

Precious metal content is unknown

Does NSN 4310-00-131-2912 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 4310-00-131-2912 was assigned to the Federal Catalog?

It was assigned 65 years ago, on Sun, Jan 1, 1961