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556946 — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

556946: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 440C, overall_height: 2.090 INCHES NOMINAL IN, inside_diameter: 0.100 INCHES MAXIMUM IN, style_designator: POPPET, flange_seat_to_disk_end_height: 1.695 INCHES NOMINAL IN, material_document_and_classification: QQ-S-763, CLASS 440C, COND A FED SPEC SINGLE MATERIAL RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-887-0328, 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
556946
NSN: 4820-00-887-0328
FSC: 4820 — Valves, Nonpowered
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP 440C
overall_height2.090 INCHES NOMINAL IN
inside_diameter0.100 INCHES MAXIMUM IN
style_designatorPOPPET
flange_seat_to_disk_end_height1.695 INCHES NOMINAL IN
material_document_and_classificationQQ-S-763, CLASS 440C, COND A FED SPEC SINGLE MATERIAL RESPONSE
NSN4820-00-887-0328
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 556946 · 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
•
FLANGE SEAT TO DISK END HEIGHT: 1.695 INCHES NOMINAL IN
•
STYLE DESIGNATOR: POPPET
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763, CLASS 440C, COND A FED SPEC SINGLE MATERIAL RESPONSE
•
INSIDE DIAMETER: 0.100 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 440C
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT1.695 INCHES NOMINAL IN
OVERALL HEIGHT2.090 INCHES NOMINAL IN
STYLE DESIGNATORPOPPET
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763, CLASS 440C, COND A FED SPEC SINGLE MATERIAL RESPONSE
INSIDE DIAMETER0.100 INCHES MAXIMUM IN
MATERIALSTEEL COMP 440C
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 556946?
556946 is a DISK,VALVE.
What is the NSN for 556946?
556946 is cataloged in the U.S. Government catalog under NSN 4820-00-887-0328. 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.