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A7420.002.156 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

A7420.002.156: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include end_item_identification: 1 INCH RELIEF VALVE IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-195-7883, 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
A7420.002.156
NSN: 4820-00-195-7883
NIINs: 001957883, 012284875, 014115488
FSC: 4820 — Valves, Nonpowered
CAGE: 01343 — ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY (USA)
SPECIFICATIONS
end_item_identification1 INCH RELIEF VALVE IN
NSN4820-00-195-7883
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: A7420.002.156 · 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
•
THREAD LENGTH: 1.438 INCHES NOMINAL SINGLE THREADED PORTION IN
•
STYLE DESIGNATOR: PLAIN THREADED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764,TYPE 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
BODY INSIDE DIAMETER: 1.000 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 1.500 INCHES SINGLE THREADED PORTION IN
•
THREAD CLASS: 2A SINGLE THREADED PORTION A
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT1.688 INCHES NOMINAL IN
THREAD LENGTH1.438 INCHES NOMINAL SINGLE THREADED PORTION IN
STYLE DESIGNATORPLAIN THREADED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764,TYPE 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
BODY INSIDE DIAMETER1.000 INCHES NOMINAL IN
NOMINAL THREAD SIZE1.500 INCHES SINGLE THREADED PORTION IN
THREAD CLASS2A SINGLE THREADED PORTION A
MATERIALSTEEL OVERALL
SEAT ANGLE IN DEG45.000 NOMINAL
THREAD SERIES DESIGNATORUNEF SINGLE THREADED PORTION
SUBSTITUTES & CROSS-REFERENCES 2
20326PC5Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
7420-002-156Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is A7420.002.156?
A7420.002.156 is a SEAT,VALVE.
What parts can replace A7420.002.156?
There are 2 known substitutes for A7420.002.156: 20326PC5, 7420-002-156. Substitute compatibility should be verified for your specific system.
What is the NSN for A7420.002.156?
A7420.002.156 is cataloged in the U.S. Government catalog under NSN 4820-00-195-7883. 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.