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555982 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

555982: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, flange_diameter: 0.367 INCHES NOMINAL IN, style_designator: PLAIN FLANGED, surface_treatment: ANODIZE OVERALL, under_flange_height: 0.135 INCHES NOMINAL IN, body_outside_diameter: 0.210 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-887-3288, 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
555982
NSN: 4820-00-887-3288
FSC: 4820 — Valves, Nonpowered
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
flange_diameter0.367 INCHES NOMINAL IN
style_designatorPLAIN FLANGED
surface_treatmentANODIZE OVERALL
under_flange_height0.135 INCHES NOMINAL IN
body_outside_diameter0.210 INCHES NOMINAL IN
seating_surface_shapeFLAT
body_stepped_inside_diameter0.125 INCHES NOMINAL FIRST STEP IN
flange_seat_to_disk_end_height0.255 INCHES NOMINAL IN
NSN4820-00-887-3288
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 555982 · 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: 0.255 INCHES NOMINAL IN
•
FLANGE DIAMETER: 0.367 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 0.210 INCHES NOMINAL IN
•
BODY STEPPED INSIDE DIAMETER: 0.092 INCHES MINIMUM AND 0.097 INCHES MAXIMUM SECOND STEP IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
SURFACE TREATMENT: ANODIZE OVERALL
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.255 INCHES NOMINAL IN
FLANGE DIAMETER0.367 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.210 INCHES NOMINAL IN
BODY STEPPED INSIDE DIAMETER0.092 INCHES MINIMUM AND 0.097 INCHES MAXIMUM SECOND STEP IN
BODY STEPPED INSIDE DIAMETER0.125 INCHES NOMINAL FIRST STEP IN
BODY STEPPED INSIDE DIAMETER0.160 INCHES NOMINAL THIRD STEP IN
STYLE DESIGNATORPLAIN FLANGED
SURFACE TREATMENTANODIZE OVERALL
UNDER FLANGE HEIGHT0.135 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY 6061 OVERALL
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 555982?
555982 is a SEAT,VALVE.
What is the NSN for 555982?
555982 is cataloged in the U.S. Government catalog under NSN 4820-00-887-3288. 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.