4820-01-187-1257 GUIDE,POPPET Index 4330-01-187-1259 METAL BOWL GUARD

National Stock Number:
4820-01-187-1258

Federal Supply Class:
4820

National Item Identification Number:
011871258

Description:
SEAT,VALVE

Detail:
A replaceable item designed to provide a circular stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see INSERT, ENGINE VALVE SEAT.


Manufacturer Information:
3660077842EATON CORPORATION
36600 PC 577842EATON CORPORATION
C364PC1508192MARINE ELECTRONICS INC
C-3610777842EATON CORPORATION


Techincal Specification:
BODY INSIDE DIAMETER1.125 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-19468 MIL SPEC SINGLE MATERIAL RESPONSE SEAT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE BODY
MATERIALNICKEL ALLOY BODY
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE SEAT
NOMINAL THREAD SIZE2.125 INCHES FIRST THREADED PORTION
NOMINAL THREAD SIZE2.500 INCHES SECOND THREADED PORTION
OVERALL HEIGHT2.515 INCHES NOMINAL
SEATING SURFACE SHAPEANGULAR
SEAT ANGLE IN DEG45.000 NOMINAL
SPECIAL FEATURESHEX WRENCHING FEATURE
STYLE DESIGNATORDOUBLE FLANGED
THREAD CLASS2A FIRST THREADED PORTION
THREAD CLASS2A SECOND THREADED PORTION
THREAD LENGTH0.688 INCHES NOMINAL FIRST THREADED PORTION
THREAD LENGTH0.594 INCHES NOMINAL SECOND THREADED PORTION
THREAD QUANTITY PER INCH12 SECOND THREADED PORTION
THREAD QUANTITY PER INCH16 FIRST THREADED PORTION
THREAD SERIES DESIGNATORUN FIRST THREADED PORTION
THREAD SERIES DESIGNATORUN SECOND THREADED PORTION


Click here to Register for Free 30-day Trial

© 2025 NSN-Now. All rights reserved.    Privacy Policy  |  Contact Us