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550516 ✓ 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

FILTER,RADIO FREQUENCY INTERFERE. Key specifications include material: STEEL ALLOY OVERALL, point_type: SPLIT, point_angle: 135.0 DEGREES NOMINAL, shank_style: STRAIGHT ROUND, flute_length: 3.188 INCHES NOMINAL IN, overall_length: 4.500 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 4820-00-369-3411, 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
550516
NSN: 4820-00-369-3411
FSC: 4820
CAGE: 77068 — ALLIED-SIGNAL INC DBA ALLIED-SIGNAL AEROSPACE CO ELECTRODYNAMICS DIV (USA)
SPECIFICATIONS
materialSTEEL ALLOY OVERALL
point_typeSPLIT
point_angle135.0 DEGREES NOMINAL
shank_styleSTRAIGHT ROUND
flute_length3.188 INCHES NOMINAL IN
flute_quantity2
overall_length4.500 INCHES NOMINAL IN
shank_diameter0.312 INCHES NOMINAL IN
special_featuresCOBALT/HSS,JOBBERS LG;FRACTIONAL SIZE 5/16
nominal_cutting_diameter0.3125 INCHES IN
cutting_rotation_directionRIGHT-HAND
nondefinitive_spec/std_dataJ TYPE
NSN4820-00-369-3411
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 550516 · 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; 0.750 IN. MAJOR OD DIA; 0.281 IN. MINOR OD DIA; 2.938 IN. O/A LG IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCRES; 0.750 IN. MAJOR OD DIA; 0.281 IN. MINOR OD DIA; 2.938 IN. O/A LG IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
550 5/16Interchangeable
interchangeable cross-reference
interchangeable
5133PL0881822Interchangeable
interchangeable cross-reference
interchangeable
NAS907Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 550516?
550516 is a FILTER,RADIO FREQUENCY INTERFERE.
What parts can replace 550516?
There are 3 known substitutes for 550516: 550 5/16, 5133PL0881822, NAS907. Substitute compatibility should be verified for your specific system.
What is the NSN for 550516?
550516 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-369-3411. 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