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0450-51 — Technical Data Sheet

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— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, surface_finish: 16.0 MICROINCHES OUTSIDE DIAMETER, first_end_style: CHAMFERED, second_end_style: SQUARE, surface_treatment: PASSIVATE OVERALL, pin_overall_length: 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4820-01-099-3727, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
0450-51
NSN: 4820-01-099-3727
FSC: 4820
CAGE: 54716 — HYDRASEARCH CO., INC. DBA USE CAGE CODE 32142 FOR CATALOGING (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
surface_finish16.0 MICROINCHES OUTSIDE DIAMETER
first_end_styleCHAMFERED
second_end_styleSQUARE
surface_treatmentPASSIVATE OVERALL
pin_overall_length0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
pin_overall_diameter0.1254 INCHES MINIMUM AND 0.1257 INCHES MAXIMUM IN
first_end_taper_angle45.0 DEGREES NOMINAL
first_end_taper_length0.050 INCHES MAXIMUM IN
criticality_code_justificationZZZY
material_document_and_classificationASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
second_end_relationship_with_first_endNOT IDENTICAL
NSN4820-01-099-3727
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 0450-51 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: NICKEL ALLOY SEAT
TECHNICAL CHARACTERISTICS
MATERIALNICKEL ALLOY SEAT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
40174InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
648698InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
402-3703InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
C4581PL990 1-2IInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A6SI51-3InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
570-3PL3737InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 0450-51?
0450-51 is a SEAT,VALVE.
What parts can replace 0450-51?
There are 14 known substitutes for 0450-51: 40174, 648698, 402-3703 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 0450-51?
0450-51 is cataloged in the Federal Logistics Information System under NSN 4820-01-099-3727. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026