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RB19054 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

RB19054: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303MA OVERALL, thread_class: 2A SINGLE THREADED PORTION A, seat_angle_in_deg: 90.000 NOMINAL, surface_treatment: PASSIVATE OVERALL, nominal_thread_size: 1.250 INCHES SINGLE THREADED PORTION IN, seating_surface_shape: ANGULAR. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-498-7302, 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
RB19054
NSN: 4820-00-498-7302
FSC: 4820 — Valves, Nonpowered
CAGE: 51663 — HYDRO-AIRE AEROSPACE CORP. DBA LEAR ROMEC DIV LEAR ROMEC (USA)
SPECIFICATIONS
materialSTEEL COMP 303MA OVERALL
thread_class2A SINGLE THREADED PORTION A
seat_angle_in_deg90.000 NOMINAL
surface_treatmentPASSIVATE OVERALL
nominal_thread_size1.250 INCHES SINGLE THREADED PORTION IN
seating_surface_shapeANGULAR
thread_quantity_per_inch18 SINGLE THREADED PORTION
thread_series_designatorUNEF SINGLE THREADED PORTION
NSN4820-00-498-7302
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: RB19054 · 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
•
NOMINAL THREAD SIZE: 1.250 INCHES SINGLE THREADED PORTION IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
THREAD CLASS: 2A SINGLE THREADED PORTION A
•
THREAD QUANTITY PER INCH: 18 SINGLE THREADED PORTION
•
MATERIAL: STEEL COMP 303MA OVERALL
•
SEAT ANGLE IN DEG: 90.000 NOMINAL
•
THREAD SERIES DESIGNATOR: UNEF SINGLE THREADED PORTION
•
SEATING SURFACE SHAPE: ANGULAR
TECHNICAL CHARACTERISTICS
NOMINAL THREAD SIZE1.250 INCHES SINGLE THREADED PORTION IN
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS2A SINGLE THREADED PORTION A
THREAD QUANTITY PER INCH18 SINGLE THREADED PORTION
MATERIALSTEEL COMP 303MA OVERALL
SEAT ANGLE IN DEG90.000 NOMINAL
THREAD SERIES DESIGNATORUNEF SINGLE THREADED PORTION
SEATING SURFACE SHAPEANGULAR
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is RB19054?
RB19054 is a SEAT,VALVE.
What is the NSN for RB19054?
RB19054 is cataloged in the U.S. Government catalog under NSN 4820-00-498-7302. 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.