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AS21902W1212V — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AS21902W1212V: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075 OVERALL, thread_class: 3A ALL ENDS A, nominal_width: 1.375 INCHES ALL ENDS IN, nominal_length: 1.750 INCHES ALL ENDS IN, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-627-7181, 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
AS21902W1212V
NSN: 4730-01-627-7181
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 7075 OVERALL
thread_class3A ALL ENDS A
nominal_width1.375 INCHES ALL ENDS IN
nominal_length1.750 INCHES ALL ENDS IN
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_styleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END ALL ENDS
style_designatorFLARELESS W/ CENTER WRENCHING FACILITY
nominal_thread_size1.0625 INCHES ALL ENDS IN
thread_quantity_per_inch12 ALL ENDS
thread_series_designatorUNIFIED NATIONAL JOINT (UNJ) ALL ENDS
specification/standard_data81343-AS5174W1212V PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
material_document_and_classificationSAE AS21902 MIL SPEC ALL MATERIAL RESPONSES OVERALL
NSN4730-01-627-7181
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS21902W1212V · 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: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END ALL ENDS
•
NOMINAL LENGTH: 1.750 INCHES ALL ENDS IN
•
CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS
•
STYLE DESIGNATOR: FLARELESS W/ CENTER WRENCHING FACILITY
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE AS21902 MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
NOMINAL THREAD SIZE: 1.0625 INCHES ALL ENDS IN
•
SPECIFICATION/STANDARD DATA: 81343-AS5174W1212V PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
NOMINAL WIDTH: 1.375 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLESWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END ALL ENDS
NOMINAL LENGTH1.750 INCHES ALL ENDS IN
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
STYLE DESIGNATORFLARELESS W/ CENTER WRENCHING FACILITY
MATERIAL DOCUMENT AND CLASSIFICATIONSAE AS21902 MIL SPEC ALL MATERIAL RESPONSES OVERALL
NOMINAL THREAD SIZE1.0625 INCHES ALL ENDS IN
SPECIFICATION/STANDARD DATA81343-AS5174W1212V PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NOMINAL WIDTH1.375 INCHES ALL ENDS IN
PART NAME ASSIGNED BY CONTROLLING AGENCYUNION,IN-LINE
THREAD CLASS3A ALL ENDS A
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 3
AS18280Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS5174W1212VReference document
Same NSN cross-reference
Reference document — Design control — primary reference
SAE-AS4841Reference document
Same NSN cross-reference
Reference document — Design control — primary 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 AS21902W1212V?
AS21902W1212V is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace AS21902W1212V?
There are 3 known substitutes for AS21902W1212V: AS18280, AS5174W1212V, SAE-AS4841. Substitute compatibility should be verified for your specific system.
What is the NSN for AS21902W1212V?
AS21902W1212V is cataloged in the U.S. Government catalog under NSN 4730-01-627-7181. 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.