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503B — VALVE,REGULATING,TEMPERATURE

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

503B: VALVE,REGULATING,TEMPERATURE.

The VALVE,REGULATING,TEMPERATURE is a the manufacturer industrial component. Key specifications include section_delay_time: 4.000 MICROSECONDS NOMINAL SINGLE SECTION US, signal_delay_method: INDUCTANCE, fsc_application_data: RADAR TRANSMITTERS,NONAIRBORNE,EXCEPT FIRE CONTROL AND GUIDEDMISSILE, terminal_type_and_quantity: 4 TAB SOLDER LUG. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-025-2910, 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
MRO→ MRO_GENERAL→ 503B
NSN: 4820-00-025-2910
NIINs: 000252910, 003946350, 008240050
FSC: 4820 — Valves, Nonpowered
CAGE: 91494 — SINGER CO THE CONTROLS DIV (USA)
SPECIFICATIONS
section_delay_time4.000 MICROSECONDS NOMINAL SINGLE SECTION US
signal_delay_methodINDUCTANCE
fsc_application_dataRADAR TRANSMITTERS,NONAIRBORNE,EXCEPT FIRE CONTROL AND GUIDEDMISSILE
terminal_type_and_quantity4 TAB SOLDER LUG
NSN4820-00-025-2910
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 503B · 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
SUBSTITUTES & CROSS-REFERENCES 3
T0532CReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
503-001Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
698-T0532CSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 503B?
503B is a VALVE,REGULATING,TEMPERATURE. It is classified as a MRO (MRO_GENERAL).
What parts can replace 503B?
There are 3 known substitutes for 503B: T0532C, 503-001, 698-T0532C. Substitute compatibility should be verified for your specific system.
What is the NSN for 503B?
503B is cataloged in the U.S. Government catalog under NSN 4820-00-025-2910. 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.