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Technical Data Sheet
PartsTable / COMPONENT / 51310B172
51310B172 ✓ 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 COVER,ELECTRICAL CONNECTOR is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, outside_diameter: 3.725 INCHES NOMINAL IN, style_designator: BUTTERFLY, material_thickness: 0.445 INCHES NOMINAL IN, bolt_circle_diameter: 3.120 INCHES NOMINAL 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 4820-01-223-8807, 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
51310B172
NSN: 4820-01-223-8807
FSC: 4820
CAGE: 1NB39 — DOVER RESOURCES, INC. DIV NORRISEAL (USA)
SPECIFICATIONS
materialCOPPER ALLOY
outside_diameter3.725 INCHES NOMINAL IN
style_designatorBUTTERFLY
material_thickness0.445 INCHES NOMINAL IN
bolt_circle_diameter3.120 INCHES NOMINAL IN
NSN4820-01-223-8807
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 51310B172 · 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
•
OUTSIDE DIAMETER: 3.725 INCHES NOMINAL IN
•
STYLE DESIGNATOR: BUTTERFLY
•
MATERIAL: COPPER ALLOY
•
MATERIAL THICKNESS: 0.445 INCHES NOMINAL IN
•
BOLT CIRCLE DIAMETER: 3.120 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER3.725 INCHES NOMINAL IN
STYLE DESIGNATORBUTTERFLY
MATERIALCOPPER ALLOY
MATERIAL THICKNESS0.445 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER3.120 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
33-5478-1Interchangeable
interchangeable cross-reference
interchangeable
40-17100-8Interchangeable
interchangeable cross-reference
interchangeable
20PC100-1Interchangeable
interchangeable cross-reference
interchangeable
900092Interchangeable
interchangeable cross-reference
interchangeable
TMD-B-502-11Interchangeable
interchangeable cross-reference
interchangeable
900-092 PIECE 4 5INInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51310B172?
51310B172 is a COVER,ELECTRICAL CONNECTOR.
What parts can replace 51310B172?
There are 9 known substitutes for 51310B172: 33-5478-1, 40-17100-8, 20PC100-1 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 51310B172?
51310B172 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-223-8807. 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