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AS21912 ✓ 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 material: STEEL CORROSION RESISTING OVERALL, leg_length: 1.500 INCHES MINIMUM AND 1.547 INCHES MAXIMUM THIRD END IN, seat_angle: 12.0 DEGREES ALL ENDS, thread_class: 3A FIRST END BULKHEAD A, connection_type: THREADED EXTERNAL TUBE ALL ENDS, connection_style: FLARELESS (TUBE) ALL ENDS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-113-5496, 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
AS21912
NSN: 4730-00-113-5496
FSC: 4730
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
leg_length1.500 INCHES MINIMUM AND 1.547 INCHES MAXIMUM THIRD END IN
seat_angle12.0 DEGREES ALL ENDS
thread_class3A FIRST END BULKHEAD A
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
connection_styleFLARELESS (TUBE) ALL ENDS
special_featuresMATERIAL CORROSION RESISTANT STEEL (15-5PH) CADMIUM PLATED; RUN HAS BULKHEAD FEATURE
surface_treatmentCADMIUM OVERALL
nominal_thread_size0.875 INCHES FIRST END BULKHEAD IN
thread_quantity_per_inch12 FIRST END BULKHEAD
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END BULKHEAD
specification/standard_data81343 - AS21912 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN4730-00-113-5496
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS21912 · 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
•
SEAT ANGLE: 12.0 DEGREES ALL ENDS
•
THREAD SERIES DESIGNATOR: UN ALL ENDS
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 1.000 INCHES ALL ENDS IN
•
CONNECTION STYLE: FLARELESS (TUBE) ALL ENDS
•
LEG LENGTH: 1.719 INCHES NOMINAL THIRD END IN
•
THREAD QUANTITY PER INCH: 12 ALL ENDS
•
NOMINAL THREAD SIZE: 1.312 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS (FLIS)
SEAT ANGLE12.0 DEGREES ALL ENDS
THREAD SERIES DESIGNATORUN ALL ENDS
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED1.000 INCHES ALL ENDS IN
CONNECTION STYLEFLARELESS (TUBE) ALL ENDS
LEG LENGTH1.719 INCHES NOMINAL THIRD END IN
THREAD SERIES DESIGNATORUN FIRST END BULKHEAD
THREAD QUANTITY PER INCH12 ALL ENDS
NOMINAL THREAD SIZE1.312 INCHES ALL ENDS IN
NOMINAL THREAD SIZE1.312 INCHES FIRST END BULKHEAD IN
THREAD CLASS3A FIRST END BULKHEAD A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
MS21912-16Interchangeable
Same NIIN cross-reference
interchangeable
AS21912-16Interchangeable
Same NIIN cross-reference
interchangeable
SAE-AS18280Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AS21912?
AS21912 is a INJECTOR ASSEMBLY,FUEL.
What parts can replace AS21912?
There are 3 known substitutes for AS21912: MS21912-16, AS21912-16, SAE-AS18280. Substitute compatibility should be verified for your specific system.
What is the NSN for AS21912?
AS21912 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-113-5496. 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