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Technical Data Sheet

MS21921V8P — Technical Data Sheet

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· 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, nut_style: TUBE COUPLING, nut_height: 0.850 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN, seat_angle: 45.00 DEGREES NOMINAL, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-543-0367, 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
MS21921V8P
NSN: 4730-01-543-0367
FSC: 4730
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleTUBE COUPLING
nut_height0.850 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN
seat_angle45.00 DEGREES NOMINAL
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
special_featuresCORROSION RESISTANT STEEL (15-5) WITH CADMIUM PLATING
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
length_to_shoulder0.599 INCHES MINIMUM AND 0.619 INCHES MAXIMUM IN
width_across_flats0.875 INCHES NOMINAL IN
nominal_thread_size0.750 INCHES IN
NSN4730-01-543-0367
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MS21921V8P · 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
SPECIFICATION/STANDARD DATA: 81343 - AS21921 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
NOMINAL THREAD SIZE: 0.750 INCHES IN
SEAT ANGLE: 45.00 DEGREES NOMINAL
THREAD QUANTITY PER INCH: 16
SMALLEST INSIDE DIAMETER: 0.552 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN
NUT STYLE: TUBE COUPLING
NOMINAL TUBE OUTSIDE DIAMETER: 0.500 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
SPECIFICATION/STANDARD DATA81343 - AS21921 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
NOMINAL THREAD SIZE0.750 INCHES IN
SEAT ANGLE45.00 DEGREES NOMINAL
THREAD QUANTITY PER INCH16
SMALLEST INSIDE DIAMETER0.552 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN
NUT STYLETUBE COUPLING
NOMINAL TUBE OUTSIDE DIAMETER0.500 INCHES IN
NUT HEIGHT0.850 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
D10008-8Same_fsc
same_fsc cross-reference
same_fsc
AC1034C08Same_fsc
same_fsc cross-reference
same_fsc
D10008-12Same_fsc
same_fsc cross-reference
same_fsc
LD83023-12Same_fsc
same_fsc cross-reference
same_fsc
H10008-12Same_fsc
same_fsc cross-reference
same_fsc
AS18280Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS21921V8P?
MS21921V8P is a INJECTOR ASSEMBLY,FUEL.
What parts can replace MS21921V8P?
There are 9 known substitutes for MS21921V8P: D10008-8, AC1034C08, D10008-12 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21921V8P?
MS21921V8P is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-543-0367. This indicates validated use in U.S. government and defense supply chains.
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