NSN 4730-01-421-5218

Part Details | UNION NUT

4730-01-421-5218 An internally threaded nut which has an internal seat or shoulder designed to engage the nut retaining flange of a union tailpiece. The threaded portion is used to engage the thread piece of a union, union elbor or the like. Excludes NUT (1), TUBE COUPLING.

Alternate Parts: 8036397434X6XXXX009, 803-6397434-X6XXXX-009, 80363974009, 803-63974-009, 6397434, 4730-01-421-5218, 01-421-5218, 4730014215218, 014215218

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
47NOV 09, 199501-421-521819964 ( NUT, UNION )
REFERENCE DRAWINGS & PICTURES

HEXAGON

Cross Reference | NSN 4730-01-421-5218
Part Number Cage Code Manufacturer
803-6397434-X6XXXX-00953711NAVAL SEA SYSTEMS COMMAND
803-63974-00953711NAVAL SEA SYSTEMS COMMAND
639743453711NAVAL SEA SYSTEMS COMMAND
Technical Data | NSN 4730-01-421-5218
Characteristic Specifications
THREAD SERIES UN
NOMINAL THREAD SIZE3.375 INCHES
THREAD QUANTITY PER INCH12
THREAD CLASS3B
THREAD DIRECTION RIGHT-HAND
NUT STYLE HEXAGON
SHOULDER WIDTH0.270 INCHES NOMINAL
WIDTH ACROSS FLATS3.719 INCHES NOMINAL
SMALLEST INSIDE DIAMETER2.762 INCHES NOMINAL
SHOULDER STEP WIDTH0.250 INCHES NOMINAL
SHOULDER SEAT DIAMETER1.469 INCHES NOMINAL
END ITEM IDENTIFICATIONSEAWOLF CLASS SSN