4B-1283-A

View detailed technical data, stock status, and sourcing information for: 4B-1283-A

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4B-1283-A
Federal Supply Group
Engines, Turbines, and Components
Federal Supply Classification
2815 Diesel Engines and Components
National Stock Number
2815-00-739-5903
Item Name Code
15884
Assigment Date
01/01/1961 (65 years ago)

Two or more complete ring, piston grouped for a single piston or for all pistons of an internal combustion engine, air compressor, or the like.

45.0 chamfer angle in deg, flat head style, 0.5820 inches nominal groove diameter, 0.0312 inches nominal chamfer length, 0.3650 inches nominal head height

Product Characteristics

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

Head Style
flat
Head Height
0.3650 inches nominal
Chamfer Angle In Deg
45.0
Groove Diameter
0.5820 inches nominal
Chamfer Length
0.0312 inches nominal
Groove Width
0.2480 inches nominal
Outside Diameter
3.3660 inches nominal
Seat Angle In Deg
45.0
Stem Style
grooved
Carbon Relief Groove
not included
Neck Radius
0.4688 inches nominal
Stem Length
12.1350 inches nominal
Stem Diameter
0.6850 inches nominal
Distance From Groove To Stem End
0.4520 inches nominal
Material And Location
unable to decode

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
4B-1283-A Engine Poppet Valve
B-5235 Engine Poppet Valve

FAQs

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

What is the FSCG of the NSN 2815-00-739-5903?
The FSCG of the NSN 2815-00-739-5903 is 2815
Does the NSN 2815-00-739-5903 have a Schedule B code assigned?
Yes, the Schedule B code is 8409998000
Does NSN 2815-00-739-5903 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 2815-00-739-5903 contain precious materials?
Precious metal content is unknown
Does NSN 2815-00-739-5903 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 2815-00-739-5903 was assigned to the Federal Catalog?
It was assigned 65 years ago, on Sun, Jan 1, 1961

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