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548899 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

548899: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4820H FLANGE, flange_diameter: 0.247 INCHES NOMINAL IN, hardness_rating: 50.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM BODY, style_designator: PLAIN FLANGED, under_flange_height: 0.464 INCHES NOMINAL IN, body_inside_diameter: 0.055 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-048-3410, 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
548899
NSN: 4820-00-048-3410
FSC: 4820 — Valves, Nonpowered
CAGE: 59364 — HONEYWELL INTERNATIONAL INC. DBA HONEYWELL INTERNATIONAL DIV AEROSPACE - TEMPE (WEST WARNER ROAD) (USA)
SPECIFICATIONS
materialSTEEL COMP 4820H FLANGE
flange_diameter0.247 INCHES NOMINAL IN
hardness_rating50.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM BODY
style_designatorPLAIN FLANGED
under_flange_height0.464 INCHES NOMINAL IN
body_inside_diameter0.055 INCHES NOMINAL IN
seating_surface_shapeFLAT
flange_seat_to_disk_end_height0.100 INCHES NOMINAL IN
NSN4820-00-048-3410
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 548899 · 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: 0.100 INCHES NOMINAL IN
•
FLANGE DIAMETER: 0.247 INCHES NOMINAL IN
•
HARDNESS RATING: 50.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM BODY
•
STYLE DESIGNATOR: PLAIN FLANGED
•
BODY INSIDE DIAMETER: 0.055 INCHES NOMINAL IN
•
UNDER FLANGE HEIGHT: 0.464 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 4820H FLANGE
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.100 INCHES NOMINAL IN
FLANGE DIAMETER0.247 INCHES NOMINAL IN
HARDNESS RATING50.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM BODY
STYLE DESIGNATORPLAIN FLANGED
BODY INSIDE DIAMETER0.055 INCHES NOMINAL IN
UNDER FLANGE HEIGHT0.464 INCHES NOMINAL IN
MATERIALSTEEL COMP 4820H FLANGE
SEATING SURFACE SHAPEFLAT
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 548899?
548899 is a SEAT,VALVE.
What is the NSN for 548899?
548899 is cataloged in the U.S. Government catalog under NSN 4820-00-048-3410. 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.