PartsTable
Technical Data Sheet
Download PDF

MS21916-4-2C — INJECTOR ASSEMBLY,FUEL

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MS21916-4-2C: INJECTOR ASSEMBLY,FUEL.

The INJECTOR ASSEMBLY,FUEL is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, reducer_type: CONCENTRIC, thread_class: 3A ALL ENDS A, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS, surface_treatment: PASSIVATE OUTSIDE, nominal_thread_size: 0.312 INCHES SECOND END IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-052-7349, 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
MS21916-4-2C
NSN: 4730-00-052-7349
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
reducer_typeCONCENTRIC
thread_class3A ALL ENDS A
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS
surface_treatmentPASSIVATE OUTSIDE
nominal_thread_size0.312 INCHES SECOND END IN
nominal_overall_length1.094 INCHES IN
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
specification/standard_data81349-MIL-F-18280C GOVERNMENT SPECIFICATION
material_document_and_classificationQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4730-00-052-7349
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS21916-4-2C · 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
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.094 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 0.438 INCHES FIRST END IN
•
SPECIFICATION/STANDARD DATA: 81349-MIL-F-18280C GOVERNMENT SPECIFICATION
•
SURFACE TREATMENT: PASSIVATE OUTSIDE
•
THREAD CLASS: 3A ALL ENDS A
TECHNICAL CHARACTERISTICS
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS
NOMINAL OVERALL LENGTH1.094 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE0.438 INCHES FIRST END IN
NOMINAL THREAD SIZE0.312 INCHES SECOND END IN
SPECIFICATION/STANDARD DATA81349-MIL-F-18280C GOVERNMENT SPECIFICATION
SURFACE TREATMENTPASSIVATE OUTSIDE
THREAD CLASS3A ALL ENDS A
MATERIALSTEEL COMP 304 OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 5
MS21916J4-2Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS18280Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS21916Reference document
Same NSN cross-reference
Reference document — Secondary reference
SAE-AS18280Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
10086117Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy MS21916-4-2C?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is MS21916-4-2C?
MS21916-4-2C is a INJECTOR ASSEMBLY,FUEL.
What parts can replace MS21916-4-2C?
There are 5 known substitutes for MS21916-4-2C: MS21916J4-2, AS18280, AS21916 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21916-4-2C?
MS21916-4-2C is cataloged in the U.S. Government catalog under NSN 4730-00-052-7349. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MS21916-4-2C

✓ 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.