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577910 — ATTENUATOR,FIXED

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

577910: ATTENUATOR,FIXED.

The ATTENUATOR,FIXED is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, body_style: ROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE, power_rating: 2.0 WATTS AVERAGE AND 0.2 KILOWATTS PEAK, flange_diameter: 0.855 INCHES MINIMUM AND 0.865 INCHES MAXIMUM IN, frequency_range: 0.000 HERTZ MINIMUM AND 18.000 GIGAHERTZ MAXIMUM, hardness_rating: 75.0 ROCKWELL R MINIMUM AND 15.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-979-6366, 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
577910
NSN: 4820-00-979-6366
NIINs: 009796366, 010554063
FSC: 4820 — Valves, Nonpowered
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
body_styleROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE
power_rating2.0 WATTS AVERAGE AND 0.2 KILOWATTS PEAK
flange_diameter0.855 INCHES MINIMUM AND 0.865 INCHES MAXIMUM IN
frequency_range0.000 HERTZ MINIMUM AND 18.000 GIGAHERTZ MAXIMUM
hardness_rating75.0 ROCKWELL R MINIMUM AND 15.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL
mounting_methodCONNECTOR
style_designatorPLAIN FLANGED
surface_treatmentPASSIVATE OVERALL
application_designTRANSMISSION LINE
under_flange_height0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
body_inside_diameter0.398 INCHES MINIMUM AND 0.402 INCHES MAXIMUM IN
NSN4820-00-979-6366
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 577910 · 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: 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
•
FLANGE DIAMETER: 0.855 INCHES MINIMUM AND 0.865 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.621 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
•
SEAL ACCOMMODATION TYPE: GROOVED
•
HARDNESS RATING: 75.0 ROCKWELL R MINIMUM AND 15.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL
•
STYLE DESIGNATOR: PLAIN FLANGED
•
BODY INSIDE DIAMETER: 0.398 INCHES MINIMUM AND 0.402 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
FLANGE DIAMETER0.855 INCHES MINIMUM AND 0.865 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.621 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
SEAL ACCOMMODATION TYPEGROOVED
HARDNESS RATING75.0 ROCKWELL R MINIMUM AND 15.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL
STYLE DESIGNATORPLAIN FLANGED
BODY INSIDE DIAMETER0.398 INCHES MINIMUM AND 0.402 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
UNDER FLANGE HEIGHT0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN
MATERIALSTEEL CORROSION RESISTING OVERALL
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 577910?
577910 is a ATTENUATOR,FIXED.
What is the NSN for 577910?
577910 is cataloged in the U.S. Government catalog under NSN 4820-00-979-6366. 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.