PartsTable
Technical Data Sheet
9975258 ✓ Verified by PartsTable
· GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

CAPACITOR,VARIABLE,AIR DIELECTRI. Key specifications include material: COPPER ALLOY STEM, bonnet_type: INSIDE SPRING, connection_type: THREADED EXTERNAL PIPE FIRST END, connection_style: PLAIN (PIPE) FIRST END, style_designator: ANGLE, thread_direction: RIGHT-HAND FIRST END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-845-4168, 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
9975258
NSN: 4820-00-845-4168
FSC: 4820
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY STEM
bonnet_typeINSIDE SPRING
connection_typeTHREADED EXTERNAL PIPE FIRST END
connection_stylePLAIN (PIPE) FIRST END
style_designatorANGLE
thread_directionRIGHT-HAND FIRST END
features_providedVALVE STEM LOCK SHIELD AND BONNET PACKING
operating_pressure350.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodSPRING
flow_control_devicePOPPET
nominal_thread_size0.250 INCHES FIRST END IN
maximum_operating_temp200.0 FAHRENHEIT SINGLE RESPONSE DEGF
NSN4820-00-845-4168
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 9975258 · 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
OPERATING PRESSURE: 350.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
STYLE DESIGNATOR: ANGLE
ADJUSTABLE PRESSURE RANGE: +301.0 TO 350.0 POUNDS PER SQUARE INCH LBS
THREAD SERIES DESIGNATOR: NPTF FIRST END
BONNET TYPE: INSIDE SPRING
VALVE DISCHARGE FLOW RATE: 504.0 POUNDS PER HOUR LBS
NOMINAL PIPE SIZE ACCOMMODATED: 0.250 INCHES FIRST END IN
MEDIA FOR WHICH DESIGNED: STEAM SINGLE RESPONSE
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS (FLIS)
OPERATING PRESSURE350.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
STYLE DESIGNATORANGLE
ADJUSTABLE PRESSURE RANGE+301.0 TO 350.0 POUNDS PER SQUARE INCH LBS
THREAD SERIES DESIGNATORNPTF FIRST END
BONNET TYPEINSIDE SPRING
VALVE DISCHARGE FLOW RATE504.0 POUNDS PER HOUR LBS
NOMINAL PIPE SIZE ACCOMMODATED0.250 INCHES FIRST END IN
MEDIA FOR WHICH DESIGNEDSTEAM SINGLE RESPONSE
NOMINAL THREAD SIZE0.250 INCHES FIRST END IN
BONNET ATTACHMENT METHODINTEGRAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
5521Interchangeable
interchangeable cross-reference
interchangeable
166D2Interchangeable
interchangeable cross-reference
interchangeable
BT5521Interchangeable
interchangeable cross-reference
interchangeable
04603Interchangeable
interchangeable cross-reference
interchangeable
251DCInterchangeable
interchangeable cross-reference
interchangeable
1001Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9975258?
9975258 is a CAPACITOR,VARIABLE,AIR DIELECTRI.
What parts can replace 9975258?
There are 25 known substitutes for 9975258: 5521, 166D2, BT5521 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 9975258?
9975258 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-845-4168. This indicates validated use in U.S. government and defense supply chains.
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