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211251 ✓ 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 ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, point_type: SPLIT, point_angle: 118.0 DEGREES NOMINAL, shank_style: STRAIGHT ROUND, flute_length: 1.000 INCHES NOMINAL IN, overall_length: 2.000 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-397-5926, 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
211251
NSN: 4730-00-397-5926
FSC: 4730
CAGE: 81982 — HYDRO-AIRE AEROSPACE CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
point_typeSPLIT
point_angle118.0 DEGREES NOMINAL
shank_styleSTRAIGHT ROUND
flute_length1.000 INCHES NOMINAL IN
flute_quantity2
overall_length2.000 INCHES NOMINAL IN
shank_diameter0.067 INCHES NOMINAL IN
special_featuresJOBBERS LG; WIRE SIZE 51
cutting_end_styleGENERAL PURPOSE
surface_treatmentOXIDE FILM OVERALL
nominal_cutting_diameter0.0670 INCHES IN
NSN4730-00-397-5926
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 211251 · 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
•
NOMINAL OVERALL LENGTH: 1.700 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-351 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: UNF SECOND END
•
CONNECTION TYPE: THREADED INTERNAL BOSS SECOND END
•
MATERIAL: ALUMINUM ALLOY OVERALL
•
CONNECTION STYLE: FLARELESS (TUBE) FIRST END
•
SURFACE TREATMENT: ANODIZE OUTSIDE
•
NOMINAL THREAD SIZE: 0.750 INCHES SECOND END IN
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL OVERALL LENGTH1.700 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-351 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATORUNF SECOND END
CONNECTION TYPETHREADED INTERNAL BOSS SECOND END
MATERIALALUMINUM ALLOY OVERALL
CONNECTION STYLEFLARELESS (TUBE) FIRST END
SURFACE TREATMENTANODIZE OUTSIDE
NOMINAL THREAD SIZE0.750 INCHES SECOND END IN
THREAD CLASS3B SECOND END
CONNECTION TYPEUNTHREADED EXTERNAL TUBE FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
NAS907 TYASZ51Interchangeable
interchangeable cross-reference
interchangeable
24179Interchangeable
interchangeable cross-reference
interchangeable
18151Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 211251?
211251 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace 211251?
There are 3 known substitutes for 211251: NAS907 TYASZ51, 24179, 18151. Substitute compatibility should be verified for your specific system.
What is the NSN for 211251?
211251 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-397-5926. 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