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PartsTable / COMPONENT / 992-D-21
992-D-21 ✓ 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,FIXED,MICA DIELECTRIC. Key specifications include material: COPPER ALLOY, overall_length: 2.000 INCHES NOMINAL IN, inside_diameter: 2.250 INCHES NOMINAL IN, outside_diameter: 2.617 INCHES NOMINAL IN, valve_design_control_activity: 75545, valve_size_for_which_designed: 2.500 INCHES IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-056-6838, 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
992-D-21
NSN: 4820-01-056-6838
FSC: 4820
CAGE: 75545 — LAWLER MANUFACTURING COMPANY, INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY
overall_length2.000 INCHES NOMINAL IN
inside_diameter2.250 INCHES NOMINAL IN
outside_diameter2.617 INCHES NOMINAL IN
valve_design_control_activity75545
valve_size_for_which_designed2.500 INCHES IN
valve_type_for_which_designedPRESSURE REDUCING
valve_model_number_for_which_designedSTYL S
NSN4820-01-056-6838
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 992-D-21 · 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
•
VALVE TYPE FOR WHICH DESIGNED: PRESSURE REDUCING
•
INSIDE DIAMETER: 2.250 INCHES NOMINAL IN
•
VALVE MODEL NUMBER FOR WHICH DESIGNED: STYL S
•
VALVE DESIGN CONTROL ACTIVITY: 75545
•
MATERIAL: COPPER ALLOY
•
OUTSIDE DIAMETER: 2.617 INCHES NOMINAL IN
•
VALVE SIZE FOR WHICH DESIGNED: 2.500 INCHES IN
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)
VALVE TYPE FOR WHICH DESIGNEDPRESSURE REDUCING
INSIDE DIAMETER2.250 INCHES NOMINAL IN
OVERALL LENGTH2.000 INCHES NOMINAL IN
VALVE MODEL NUMBER FOR WHICH DESIGNEDSTYL S
VALVE DESIGN CONTROL ACTIVITY75545
MATERIALCOPPER ALLOY
OUTSIDE DIAMETER2.617 INCHES NOMINAL IN
VALVE SIZE FOR WHICH DESIGNED2.500 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
2941Interchangeable
interchangeable cross-reference
interchangeable
294-100Interchangeable
interchangeable cross-reference
interchangeable
C69AA1A2AM0DInterchangeable
interchangeable cross-reference
interchangeable
6264302Interchangeable
interchangeable cross-reference
interchangeable
87761Interchangeable
interchangeable cross-reference
interchangeable
992DInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 992-D-21?
992-D-21 is a CAPACITOR,FIXED,MICA DIELECTRIC.
What parts can replace 992-D-21?
There are 18 known substitutes for 992-D-21: 2941, 294-100, C69AA1A2AM0D and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 992-D-21?
992-D-21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-056-6838. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026