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NMP-128 ✓ 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

The CAPACITOR,FIXED,ELECTROLYTIC is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include material: COPPER ALLOY, seat_angle: 45.0 DEGREES NOMINAL, thread_class: 2B, overall_height: 1.675 INCHES NOMINAL IN, outside_diameter: 2.500 INCHES NOMINAL IN, style_designator: PLUG. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-036-1739, 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
NMP-128
NSN: 4820-00-036-1739
FSC: 4820
CAGE: 75954 — KUNKLE INDUSTRIES INC LONERGAN VALVE DIV (USA)
SPECIFICATIONS
materialCOPPER ALLOY
seat_angle45.0 DEGREES NOMINAL
thread_class2B
overall_height1.675 INCHES NOMINAL IN
outside_diameter2.500 INCHES NOMINAL IN
style_designatorPLUG
nominal_thread_size0.500 INCHES IN
thread_series_designatorUNF
NSN4820-00-036-1739
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: NMP-128 · 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
•
SEAT ANGLE: 45.0 DEGREES NOMINAL
•
MATERIAL: COPPER ALLOY
•
STYLE DESIGNATOR: PLUG
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
THREAD SERIES DESIGNATOR: UNF
•
OUTSIDE DIAMETER: 2.500 INCHES NOMINAL IN
•
THREAD CLASS: 2B
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)
SEAT ANGLE45.0 DEGREES NOMINAL
MATERIALCOPPER ALLOY
STYLE DESIGNATORPLUG
NOMINAL THREAD SIZE0.500 INCHES IN
OVERALL HEIGHT1.675 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNF
OUTSIDE DIAMETER2.500 INCHES NOMINAL IN
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
005.101.0007Interchangeable
interchangeable cross-reference
interchangeable
005-101-0007Interchangeable
Same NIIN cross-reference
interchangeable
18-1-5Interchangeable
Same NIIN cross-reference
interchangeable
18-5-1-161Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NMP-128?
NMP-128 is a CAPACITOR,FIXED,ELECTROLYTIC.
What parts can replace NMP-128?
There are 4 known substitutes for NMP-128: 005.101.0007, 005-101-0007, 18-1-5 and 1 more. Substitute compatibility should be verified for your specific system.
Is NMP-128 still available?
NMP-128 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026