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NMP227 PIECE 51 — Technical Data Sheet

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— · 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 SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, thread_class: 2A SINGLE THREADED PORTION A, thread_length: 0.281 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_height: 0.500 INCHES NOMINAL IN, style_designator: PLAIN THREADED, seat_angle_in_deg: 45.000 NOMINAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4820-00-036-1738, 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
NMP227 PIECE 51
NSN: 4820-00-036-1738
FSC: 4820
CAGE: 75954 — KUNKLE INDUSTRIES INC LONERGAN VALVE DIV (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class2A SINGLE THREADED PORTION A
thread_length0.281 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_height0.500 INCHES NOMINAL IN
style_designatorPLAIN THREADED
seat_angle_in_deg45.000 NOMINAL
nominal_thread_size1.808 INCHES SINGLE THREADED PORTION IN
body_inside_diameter0.984 INCHES NOMINAL IN
seating_surface_shapeANGULAR
thread_quantity_per_inch18 SINGLE THREADED PORTION
thread_series_designatorUN SINGLE THREADED PORTION
NSN4820-00-036-1738
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: NMP227 PIECE 51 · 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
•
STYLE DESIGNATOR: PLAIN THREADED
•
SEATING SURFACE SHAPE: ANGULAR
•
THREAD LENGTH: 0.281 INCHES NOMINAL SINGLE THREADED PORTION IN
•
MATERIAL: NICKEL ALLOY OVERALL
•
THREAD SERIES DESIGNATOR: UN SINGLE THREADED PORTION
•
NOMINAL THREAD SIZE: 1.808 INCHES SINGLE THREADED PORTION IN
•
SEAT ANGLE IN DEG: 45.000 NOMINAL
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.500 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN THREADED
SEATING SURFACE SHAPEANGULAR
THREAD LENGTH0.281 INCHES NOMINAL SINGLE THREADED PORTION IN
MATERIALNICKEL ALLOY OVERALL
THREAD SERIES DESIGNATORUN SINGLE THREADED PORTION
NOMINAL THREAD SIZE1.808 INCHES SINGLE THREADED PORTION IN
SEAT ANGLE IN DEG45.000 NOMINAL
BODY INSIDE DIAMETER0.984 INCHES NOMINAL IN
THREAD QUANTITY PER INCH18 SINGLE THREADED PORTION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
5154InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
DS-934338InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
10-292730InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
127CInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
TVR12-11InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
70C44081A01InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NMP227 PIECE 51?
NMP227 PIECE 51 is a SEAT,VALVE.
What parts can replace NMP227 PIECE 51?
There are 16 known substitutes for NMP227 PIECE 51: 5154, DS-934338, 10-292730 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NMP227 PIECE 51?
NMP227 PIECE 51 is cataloged in the Federal Logistics Information System under NSN 4820-00-036-1738. 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: September 2026