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PartsTable / COMPONENT / 990 1-1/2
990 1-1/2 ✓ 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 990 1-1/2 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-431-7505, 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
990 1-1/2
NSN: 4820-01-431-7505
FSC: 4820
CAGE: 86184 — GRISWOLD INDUSTRIES DBA CLA-VAL CO (USA)
SPECIFICATIONS
Part Number990 1-1/2
NSN4820-01-431-7505
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 990 1-1/2 · 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
•
FIRST END CONNECTION TYPE: THREADED EXTERNAL PIPE
•
BODY STYLE: STRAIGHT THRU
•
FURNISHED ITEMS: UNION NUT AND TAILPIECE
•
MEDIA FOR WHICH DESIGNED: WATER
•
FIRST END STYLE DESIGNATOR: PLAIN
•
FIRST END THREAD DIRECTION: RIGHT-HAND
•
FLOW CONTROL DEVICE: DISK
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
TECHNICAL CHARACTERISTICS (FLIS)
FIRST END CONNECTION TYPETHREADED EXTERNAL PIPE
BODY STYLESTRAIGHT THRU
FURNISHED ITEMSUNION NUT AND TAILPIECE
MEDIA FOR WHICH DESIGNEDWATER
FIRST END STYLE DESIGNATORPLAIN
FIRST END THREAD DIRECTIONRIGHT-HAND
FLOW CONTROL DEVICEDISK
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
END CONNECTION QUANTITY2
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
99-0112Interchangeable
IBM cache battery pack 3.6V
interchangeable
021112Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 990 1-1/2?
990 1-1/2 is a 990 1-1/2.
What parts can replace 990 1-1/2?
There are 2 known substitutes for 990 1-1/2: 99-0112, 021112. Substitute compatibility should be verified for your specific system.
What is the NSN for 990 1-1/2?
990 1-1/2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-431-7505. 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