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2021888 — ADAPTER,STRAIGHT,PIPE TO TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

2021888: ADAPTER,STRAIGHT,PIPE TO TUBE.

The ADAPTER,STRAIGHT,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, nut_style: TUBE COUPLING, flow_angle: 90.0 DEGREES, leg_length: 20.3 MILLIMETERS NOMINAL FIRST END MM, nut_height: 0.730 INCHES NOMINAL IN, seat_angle: 20.0 DEGREES FIRST END. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-270-4580, 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
2021888
NSN: 4730-00-270-4580
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleTUBE COUPLING
flow_angle90.0 DEGREES
leg_length20.3 MILLIMETERS NOMINAL FIRST END MM
nut_height0.730 INCHES NOMINAL IN
seat_angle20.0 DEGREES FIRST END
reducer_typeCONCENTRIC
thread_class2A FIRST END A
overall_width0.375 INCHES NOMINAL IN
thread_seriesUNS
overall_length1.220 INCHES NOMINAL IN
connection_typeTHREADED EXTERNAL TUBE FIRST END
NSN4730-00-270-4580
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2021888 · 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
SUBSTITUTES & CROSS-REFERENCES 9
J246Reference document
Same NSN cross-reference
Reference document — Secondary reference
4-4 120102BAReference document
Same NSN cross-reference
Reference document — Secondary reference
VS68B-4-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
SAE J246 4-4 120102BAReference document
Same NSN cross-reference
Reference document — Secondary reference
7377806Reference document
Same NSN cross-reference
Reference document — Secondary reference
68AB-4-4Reference 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 2021888?
2021888 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace 2021888?
There are 9 known substitutes for 2021888: J246, 4-4 120102BA, VS68B-4-4 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2021888?
2021888 is cataloged in the U.S. Government catalog under NSN 4730-00-270-4580. 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.