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3556-1-64 — UNION,VALVE DISK STEM

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

3556-1-64: UNION,VALVE DISK STEM.

The UNION,VALVE DISK STEM is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: STAINLESS STEEL; LOCKWELDS ARE EMPLOYED ON DISK AND DISK UNION AS A MEANS OF SECURING. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-236-6021, 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
3556-1-64
NSN: 4730-01-236-6021
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 57574 — VELAN VALVE CORP. (USA)
SPECIFICATIONS
general_characteristics_item_descriptionSTAINLESS STEEL; LOCKWELDS ARE EMPLOYED ON DISK AND DISK UNION AS A MEANS OF SECURING
NSN4730-01-236-6021
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3556-1-64 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
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GENERAL CHARACTERISTICS ITEM DESCRIPTION: STAINLESS STEEL; LOCKWELDS ARE EMPLOYED ON DISK AND DISK UNION AS A MEANS OF SECURING
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSTAINLESS STEEL; LOCKWELDS ARE EMPLOYED ON DISK AND DISK UNION AS A MEANS OF SECURING
SUBSTITUTES & CROSS-REFERENCES 1
33626-1Reference 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 3556-1-64?
3556-1-64 is a UNION,VALVE DISK STEM.
What parts can replace 3556-1-64?
There is 1 known substitute for 3556-1-64: 33626-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 3556-1-64?
3556-1-64 is cataloged in the U.S. Government catalog under NSN 4730-01-236-6021. 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.