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N-551 PIECE 4 — RETAINER,DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

N-551 PIECE 4: RETAINER,DISK,VALVE.

The RETAINER,DISK,VALVE is a the manufacturer industrial component. Key specifications include inside_diameter: 0.1250 INCHES NOMINAL IN, outside_diameter: 1.4375 INCHES NOMINAL IN, end_item_identification: E/I PRESSURE REDUCING VALVE, valve_design_control_activity: 35795, valve_size_for_which_designed: 1.000 INCHES IN, valve_model_number_for_which_designed: MODEL 30. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-462-6077, 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
N-551 PIECE 4
NSN: 4820-01-462-6077
FSC: 4820 — Valves, Nonpowered
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
inside_diameter0.1250 INCHES NOMINAL IN
outside_diameter1.4375 INCHES NOMINAL IN
end_item_identificationE/I PRESSURE REDUCING VALVE
valve_design_control_activity35795
valve_size_for_which_designed1.000 INCHES IN
valve_model_number_for_which_designedMODEL 30
NSN4820-01-462-6077
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: N-551 PIECE 4 · 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
•
VALVE MODEL NUMBER FOR WHICH DESIGNED: MODEL 30
•
OUTSIDE DIAMETER: 1.4375 INCHES NOMINAL IN
•
VALVE SIZE FOR WHICH DESIGNED: 1.000 INCHES IN
•
INSIDE DIAMETER: 0.1250 INCHES NOMINAL IN
•
VALVE DESIGN CONTROL ACTIVITY: 35795
TECHNICAL CHARACTERISTICS
VALVE MODEL NUMBER FOR WHICH DESIGNEDMODEL 30
OUTSIDE DIAMETER1.4375 INCHES NOMINAL IN
VALVE SIZE FOR WHICH DESIGNED1.000 INCHES IN
INSIDE DIAMETER0.1250 INCHES NOMINAL IN
VALVE DESIGN CONTROL ACTIVITY35795
END ITEM IDENTIFICATIONE/I PRESSURE REDUCING VALVE
SUBSTITUTES & CROSS-REFERENCES 1
N-551Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is N-551 PIECE 4?
N-551 PIECE 4 is a RETAINER,DISK,VALVE.
What parts can replace N-551 PIECE 4?
There is 1 known substitute for N-551 PIECE 4: N-551. Substitute compatibility should be verified for your specific system.
What is the NSN for N-551 PIECE 4?
N-551 PIECE 4 is cataloged in the U.S. Government catalog under NSN 4820-01-462-6077. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.