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MS21916-6-4 — INJECTOR ASSEMBLY,FUEL

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MS21916-6-4: INJECTOR ASSEMBLY,FUEL.

The INJECTOR ASSEMBLY,FUEL is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1137 OR STEEL COMP 1141 OR STEEL COMP 4130 OVERALL, reducer_type: CONCENTRIC, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL BOSS ALL ENDS, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS, surface_treatment: CADMIUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-541-4901, 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
MS21916-6-4
NSN: 4730-00-541-4901
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: K3784 — MARSHALL OF CAMBRIDGE AEROSPACE LIMITED (GBR)
SPECIFICATIONS
materialSTEEL COMP 1137 OR STEEL COMP 1141 OR STEEL COMP 4130 OVERALL
reducer_typeCONCENTRIC
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL BOSS ALL ENDS
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS
surface_treatmentCADMIUM OVERALL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.438 INCHES SECOND END IN
maximum_operating_temp275.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length1.219 INCHES IN
end_item_identificationGRUMMAN A10 AIRCRAFT; X2M ASSAULT AMPHIBIOUS VEHICLE, COMMAND (AAVC-7A1)
media_for_which_designedHYDRAULIC FLUID SINGLE RESPONSE
NSN4730-00-541-4901
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS21916-6-4 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.219 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL BOSS ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-367 FED SPEC SINGLE MATERIAL RESPONSE OR ASTM A576-677 ASSN STD SINGLE MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
REDUCED PASSAGE NOMINAL INSIDE DIAMETER: 0.188 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.438 INCHES SECOND END IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS
NOMINAL OVERALL LENGTH1.219 INCHES IN
CONNECTION TYPETHREADED EXTERNAL BOSS ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-367 FED SPEC SINGLE MATERIAL RESPONSE OR ASTM A576-677 ASSN STD SINGLE MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
REDUCED PASSAGE NOMINAL INSIDE DIAMETER0.188 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.438 INCHES SECOND END IN
NOMINAL THREAD SIZE0.562 INCHES FIRST END IN
SPECIFICATION/STANDARD DATA96906-MS21916 GOVERNMENT STANDARD
SUBSTITUTES & CROSS-REFERENCES 6
ER919-6Reference document
Same NSN cross-reference
Reference document — Secondary reference
ER919-6-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
4730-541-4901Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS21916-6-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS18280Reference document
Same NSN cross-reference
Reference document — Secondary reference
4730005414901Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS21916-6-4?
MS21916-6-4 is a INJECTOR ASSEMBLY,FUEL.
What parts can replace MS21916-6-4?
There are 6 known substitutes for MS21916-6-4: ER919-6, ER919-6-4, 4730-541-4901 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21916-6-4?
MS21916-6-4 is cataloged in the U.S. Government catalog under NSN 4730-00-541-4901. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.