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Technical Data Sheet
PartsTable / COMPONENT / C-056166 ITEM 21
C-056166 ITEM 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

The PROTECTIVE RING,VALVE is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: CRES; OVERSIZED; 7.859 IN. OD; 6.938 IN.

ID; 0.312 IN. THK 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 4820-01-210-5825, 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
C-056166 ITEM 21
NSN: 4820-01-210-5825
FSC: 4820
CAGE: 48422 — WILLIAM POWELL COMPANY, THE DBA POWELL VALVE DIV THE STARFLO CORPORATION (USA)
SPECIFICATIONS
general_characteristics_item_descriptionCRES; OVERSIZED; 7.859 IN. OD; 6.938 IN. ID; 0.312 IN. THK IN
NSN4820-01-210-5825
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: C-056166 ITEM 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: CRES; OVERSIZED; 7.859 IN. OD; 6.938 IN. ID; 0.312 IN. THK IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCRES; OVERSIZED; 7.859 IN. OD; 6.938 IN. ID; 0.312 IN. THK IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
4017391-0701Interchangeable
interchangeable cross-reference
interchangeable
80092Interchangeable
interchangeable cross-reference
interchangeable
80103Interchangeable
interchangeable cross-reference
interchangeable
21FK632Interchangeable
interchangeable cross-reference
interchangeable
7367747Interchangeable
interchangeable cross-reference
interchangeable
0056166Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C-056166 ITEM 21?
C-056166 ITEM 21 is a PROTECTIVE RING,VALVE.
What parts can replace C-056166 ITEM 21?
There are 14 known substitutes for C-056166 ITEM 21: 4017391-0701, 80092, 80103 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C-056166 ITEM 21?
C-056166 ITEM 21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-210-5825. 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