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Technical Data Sheet
PartsTable / COMPONENT / MS21916-4C
MS21916-4C ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The INJECTOR ASSEMBLY,FUEL is a the manufacturer industrial component. Key specifications include reducer_type: CONCENTRIC, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL BOSS ALL ENDS, surface_treatment: PASSIVATE OVERALL, nominal_thread_size: 0.562 INCHES FIRST END IN, nominal_overall_length: 1.219 INCHES IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-720-0233, 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
MS21916-4C
NSN: 4730-00-720-0233
FSC: 4730
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
reducer_typeCONCENTRIC
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL BOSS ALL ENDS
special_featuresMATERIAL: STEEL COMP 304 OVERALL; CONNECTION STYLE:EXTERNAL SEAT FOR GASKET SEAL ALL ENDS; MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL.
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.562 INCHES FIRST END IN
nominal_overall_length1.219 INCHES IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
specification/standard_data81343-AS21916 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
surface_treatment_document_and_classificationMIL-F-14072,E300,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE
NSN4730-00-720-0233
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS21916-4C · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD CLASS: 3A ALL ENDS A
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
REDUCER TYPE: CONCENTRIC
•
NOMINAL THREAD SIZE: 0.438 INCHES SECOND END IN
•
NOMINAL OVERALL LENGTH: 1.219 INCHES IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-14072,E300,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3A ALL ENDS A
SURFACE TREATMENTPASSIVATE OVERALL
REDUCER TYPECONCENTRIC
NOMINAL THREAD SIZE0.438 INCHES SECOND END IN
NOMINAL OVERALL LENGTH1.219 INCHES IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072,E300,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE
NOMINAL THREAD SIZE0.562 INCHES FIRST END IN
CONNECTION TYPETHREADED EXTERNAL BOSS ALL ENDS
SPECIFICATION/STANDARD DATA81343-AS21916 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
ST7M141C5LInterchangeable
interchangeable cross-reference
interchangeable
10117486Interchangeable
interchangeable cross-reference
interchangeable
PLGA1561020Interchangeable
interchangeable cross-reference
interchangeable
156102Interchangeable
interchangeable cross-reference
interchangeable
201.25.27.10-01.01 ITEM-009Interchangeable
interchangeable cross-reference
interchangeable
HU09156102Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS21916-4C?
MS21916-4C is a INJECTOR ASSEMBLY,FUEL.
What parts can replace MS21916-4C?
There are 17 known substitutes for MS21916-4C: ST7M141C5L, 10117486, PLGA1561020 and 14 more. Substitute compatibility should be verified for your specific system.
Is MS21916-4C still available?
MS21916-4C 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