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202-21511-04C — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

202-21511-04C: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1137 OVERALL, nut_style: TUBE COUPLING, nut_height: 0.640 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-936-4360, 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
202-21511-04C
NSN: 4730-00-936-4360
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 80378 — TRIUMPH AEROSTRUCTURES, LLC DBA TRIUMPH AEROSTRUCTURES - VOUGHT INTEGRATED PROGRAMS DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP 1137 OVERALL
nut_styleTUBE COUPLING
nut_height0.640 INCHES NOMINAL IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
length_to_shoulder0.500 INCHES NOMINAL IN
width_across_flats0.559 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
smallest_inside_diameter0.437 INCHES NOMINAL IN
thread_quantity_per_inch20
NSN4730-00-936-4360
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 202-21511-04C · 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
•
LENGTH TO SHOULDER: 0.500 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.559 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
NUT HEIGHT: 0.640 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER0.500 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.559 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.438 INCHES IN
NUT HEIGHT0.640 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
NUT STYLETUBE COUPLING
THREAD CLASS3B
SUBSTITUTES & CROSS-REFERENCES 8
SAE-AS4841Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
AS4370Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS4370J04-Reference document
Same NSN cross-reference
Reference document — Secondary reference
029001-4CReference document
Same NSN cross-reference
Reference document — Secondary reference
MS27073-4JReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
105-0384-04Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 202-21511-04C?
202-21511-04C is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace 202-21511-04C?
There are 8 known substitutes for 202-21511-04C: SAE-AS4841, AS4370, AS4370J04- and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 202-21511-04C?
202-21511-04C is cataloged in the U.S. Government catalog under NSN 4730-00-936-4360. 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.