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N-12188 5IN PC4 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

N-12188 5IN PC4: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, overall_height: 0.937 INCHES NOMINAL IN, special_features: NHA VALVE GATE 5 INCH IN, style_designator: PLAIN, body_inside_diameter: 5.187 INCHES NOMINAL IN, body_outside_diameter: 5.625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-459-5681, 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-12188 5IN PC4
NSN: 4820-01-459-5681
FSC: 4820 — Valves, Nonpowered
CAGE: 76364 — MILWAUKEE VALVE CO, INC DIV MILWAUKEE VALVE COMPANY, LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
overall_height0.937 INCHES NOMINAL IN
special_featuresNHA VALVE GATE 5 INCH IN
style_designatorPLAIN
body_inside_diameter5.187 INCHES NOMINAL IN
body_outside_diameter5.625 INCHES NOMINAL IN
seating_surface_shapeO-RING
end_item_identificationW/S CODE NIMITZ CLASS CVN
material_document_and_classificationQQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4820-01-459-5681
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: N-12188 5IN PC4 · 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
•
BODY OUTSIDE DIAMETER: 5.625 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
BODY INSIDE DIAMETER: 5.187 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.937 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER5.625 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-288 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
BODY INSIDE DIAMETER5.187 INCHES NOMINAL IN
SPECIAL FEATURESNHA VALVE GATE 5 INCH IN
END ITEM IDENTIFICATIONW/S CODE NIMITZ CLASS CVN
MATERIALCOPPER ALLOY OVERALL
SEATING SURFACE SHAPEO-RING
SUBSTITUTES & CROSS-REFERENCES 2
5476-5-1-YSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
N-12188Reference 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-12188 5IN PC4?
N-12188 5IN PC4 is a SEAT,VALVE.
What parts can replace N-12188 5IN PC4?
There are 2 known substitutes for N-12188 5IN PC4: 5476-5-1-Y, N-12188. Substitute compatibility should be verified for your specific system.
What is the NSN for N-12188 5IN PC4?
N-12188 5IN PC4 is cataloged in the U.S. Government catalog under NSN 4820-01-459-5681. 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.