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Technical Data Sheet
PartsTable / COMPONENT / 803-2177525-C4B1AF
803-2177525-C4B1AF ✓ 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

HOLDER,ELECTRICAL CONTACT BRUSH. Key specifications include material: STEEL BODY, valve_size: 0.750 INCHES IN, valve_operation_method: MANUAL, material_document_and_classification: MIL-S-24093 MIL SPEC SINGLE MATERIAL RESPONSE BODY, part_name_assigned_by_controlling_agency: ANGLE STOP WITH BACKSEAT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-491-8055, 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
803-2177525-C4B1AF
NSN: 4820-00-491-8055
FSC: 4820
CAGE: 80064 — NAVAL SHIP SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL BODY
valve_size0.750 INCHES IN
valve_operation_methodMANUAL
material_document_and_classificationMIL-S-24093 MIL SPEC SINGLE MATERIAL RESPONSE BODY
part_name_assigned_by_controlling_agencyANGLE STOP WITH BACKSEAT
NSN4820-00-491-8055
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 803-2177525-C4B1AF · 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
•
MATERIAL: STEEL BODY
•
NOMINAL PIPE SIZE ACCOMMODATED: 0.750 INCHES FIRST END IN
•
FLOW CONTROL DEVICE: DISK
•
MAXIMUM OPERATING TEMP: 775.0 FAHRENHEIT SINGLE RESPONSE DEGF
•
VALVE OPERATION METHOD: MANUAL
•
BONNET TYPE: OUTSIDE SCREW-YOKE
•
BONNET ATTACHMENT METHOD: BOLTED
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL BODY
MATERIALSTEEL FLOW CONTROL DEVICE
NOMINAL PIPE SIZE ACCOMMODATED0.750 INCHES FIRST END IN
FLOW CONTROL DEVICEDISK
MAXIMUM OPERATING TEMP775.0 FAHRENHEIT SINGLE RESPONSE DEGF
VALVE OPERATION METHODMANUAL
BONNET TYPEOUTSIDE SCREW-YOKE
BONNET ATTACHMENT METHODBOLTED
MATERIALSTEEL STEM
MATERIALSTEEL SEAT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
5530WInterchangeable
interchangeable cross-reference
interchangeable
803-2177525-C4B1AFInterchangeable
interchangeable cross-reference
interchangeable
803-2177525-C4B1AFL1Interchangeable
Same NIIN cross-reference
interchangeable
803-2177525-C421AFInterchangeable
Same NIIN cross-reference
interchangeable
803-2177525-C421AFL1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 803-2177525-C4B1AF?
803-2177525-C4B1AF is a HOLDER,ELECTRICAL CONTACT BRUSH.
What parts can replace 803-2177525-C4B1AF?
There are 5 known substitutes for 803-2177525-C4B1AF: 5530W, 803-2177525-C4B1AF, 803-2177525-C4B1AFL1 and 2 more. Substitute compatibility should be verified for your specific system.
Is 803-2177525-C4B1AF still available?
803-2177525-C4B1AF 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