PartsTable
Technical Data Sheet
PartsTable / MRO / S-203-7
S-203-7 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The LOCK,VALVE SPRING RETAINER is a the manufacturer industrial component. Key specifications include body_width: 2.188 INCHES MINIMUM AND 2.312 INCHES MAXIMUM IN, body_height: 3.938 INCHES MINIMUM AND 4.062 INCHES MAXIMUM IN, body_length: 2.438 INCHES MINIMUM AND 2.562 INCHES MAXIMUM IN, inclosure_type: HERMETICALLY SEALED, overall_height: 4.532 INCHES MINIMUM AND 4.656 INCHES MAXIMUM IN, special_features: STYLE DESIGNATOR:NO.60 IRREGULAR SHAPE FROM FIIG A03200. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5915-00-228-5407, 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
MRO→ MRO_GENERAL→ S-203-7
NSN: 5915-00-228-5407
FSC: 5915
CAGE: 09376 — OMNITEC DATA CORP SUB OF NYTRONICS INC (USA)
SPECIFICATIONS
body_width2.188 INCHES MINIMUM AND 2.312 INCHES MAXIMUM IN
body_height3.938 INCHES MINIMUM AND 4.062 INCHES MAXIMUM IN
body_length2.438 INCHES MINIMUM AND 2.562 INCHES MAXIMUM IN
inclosure_typeHERMETICALLY SEALED
overall_height4.532 INCHES MINIMUM AND 4.656 INCHES MAXIMUM IN
special_featuresSTYLE DESIGNATOR:NO.60 IRREGULAR SHAPE FROM FIIG A03200
style_designatorRECTANGULAR TERMINAL/TERMINALS ON ONE SURFACE
nominal_thread_size0.138 INCHES IN
supplementary_featuresCROSS-SECTIONAL SHAPE STYLE:NO.195 IRREGULAR SHAPE FROM FIIG A03200
reference_frequency_per_function800.0 HERTZ BLANK LOCATION NOT OTHERWISE SPECIFIED
frequency_band_width_per_function780.00 HERTZ BLANK AND 820.00 HERTZ BLANK LOCATION NOT OTHERWISE SPECIFIED
input_impedance_per_function_w/load120.0 KILOHMS BLANK LOCATION NOT OTHERWISE SPECIFIED
NSN5915-00-228-5407
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available LOCK,VALVE SPRING RETAINER TITLE COMPONENT PN S-203-7 MFR LOCK,VALVE SPRING RETA
KEY FEATURES
•
FUNCTIONAL TERMINAL TYPE AND QUANTITY: 2 TAB, SOLDER LUG GROUND THIRD FUNCTION
•
DISCRIMINATION AT SPECIFIED FREQUENCIES PER FUNCTION IN DECIBELS: 75.0 NOMINAL BLANK AND 2.0 NOMINAL BLANK AND 65.0 NOMINAL BLANK FIRST FUNCTION
•
REFERENCE FREQUENCY PER FUNCTION: 800.0 HERTZ BLANK LOCATION NOT OTHERWISE SPECIFIED
•
SPECIFIED FREQUENCIES OF DISCRIMINATION PER FUNCTION: 410.00 HERTZ BLANK AND 780.00 HERTZ BLANK AND 820.00 HERTZ BLANK AND 1.17 KILOHERTZ BLANK LOCATION NOT OTHERWISE SPECIFIED
•
MOUNTING FACILITY TYPE AND QUANTITY: 4 THREADED STUD(S) LOCATION NOT OTHERWISE SPECIFIED
•
OUTPUT IMPEDANCE PER FUNCTION W/SOURCE ACROSS INPUT: 500.0 KILOHMS BLANK LOCATION NOT OTHERWISE SPECIFIED
•
STYLE DESIGNATOR: RECTANGULAR TERMINAL/TERMINALS ON ONE SURFACE
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT4.532 INCHES MINIMUM AND 4.656 INCHES MAXIMUM IN
FUNCTIONAL TERMINAL TYPE AND QUANTITY2 TAB, SOLDER LUG GROUND THIRD FUNCTION
DISCRIMINATION AT SPECIFIED FREQUENCIES PER FUNCTION IN DECIBELS75.0 NOMINAL BLANK AND 2.0 NOMINAL BLANK AND 65.0 NOMINAL BLANK FIRST FUNCTION
REFERENCE FREQUENCY PER FUNCTION800.0 HERTZ BLANK LOCATION NOT OTHERWISE SPECIFIED
SPECIFIED FREQUENCIES OF DISCRIMINATION PER FUNCTION410.00 HERTZ BLANK AND 780.00 HERTZ BLANK AND 820.00 HERTZ BLANK AND 1.17 KILOHERTZ BLANK LOCATION NOT OTHERWISE SPECIFIED
MOUNTING FACILITY TYPE AND QUANTITY4 THREADED STUD(S) LOCATION NOT OTHERWISE SPECIFIED
OUTPUT IMPEDANCE PER FUNCTION W/SOURCE ACROSS INPUT500.0 KILOHMS BLANK LOCATION NOT OTHERWISE SPECIFIED
STYLE DESIGNATORRECTANGULAR TERMINAL/TERMINALS ON ONE SURFACE
INPUT IMPEDANCE PER FUNCTION W/LOAD120.0 KILOHMS BLANK LOCATION NOT OTHERWISE SPECIFIED
FREQUENCY BAND WIDTH PER FUNCTION780.00 HERTZ BLANK AND 820.00 HERTZ BLANK LOCATION NOT OTHERWISE SPECIFIED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
12420471Interchangeable
interchangeable cross-reference
interchangeable
12420471-002Interchangeable
interchangeable cross-reference
interchangeable
17591Interchangeable
interchangeable cross-reference
interchangeable
VR12AInterchangeable
interchangeable cross-reference
interchangeable
LK82Interchangeable
interchangeable cross-reference
interchangeable
S2037Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S-203-7?
S-203-7 is a LOCK,VALVE SPRING RETAINER. It is classified as a MRO (MRO_GENERAL).
What parts can replace S-203-7?
There are 11 known substitutes for S-203-7: 12420471, 12420471-002, 17591 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S-203-7?
S-203-7 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5915-00-228-5407. 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