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AN828-20 ✓ 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, seat_angle: 37.0 DEGREES FIRST END, thread_class: 3A CENTER BULKHEAD A, connection_type: THREADED EXTERNAL TUBE FIRST END, connection_style: FLARED W/ GASKET SEAL (BOSS) SECOND END, nominal_thread_size: 1.625 INCHES CENTER BULKHEAD 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 4730-00-277-6419, 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
AN828-20
NSN: 4730-00-277-6419
FSC: 4730
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
seat_angle37.0 DEGREES FIRST END
thread_class3A CENTER BULKHEAD A
connection_typeTHREADED EXTERNAL TUBE FIRST END
connection_styleFLARED W/ GASKET SEAL (BOSS) SECOND END
nominal_thread_size1.625 INCHES CENTER BULKHEAD IN
nominal_overall_length3.310 INCHES IN
end_item_identificationAIRCRAFT APPLICATION
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) CENTER BULKHEAD
nondefinitive_spec/std_data3A FIGURE A
specification/standard_data81343-AS4841 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
furnished_items_and_quantity1 BULKHEAD NUT
NSN4730-00-277-6419
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN828-20 · 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
•
FURNISHED ITEMS AND QUANTITY: 1 BULKHEAD NUT
•
THREAD CLASS: 3A CENTER BULKHEAD A
•
CONNECTION TYPE: THREADED EXTERNAL BOSS SECOND END
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF) CENTER BULKHEAD
•
CONNECTION STYLE: FLARED (TUBE) FIRST END
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 1.250 INCHES FIRST END IN
•
NOMINAL THREAD SIZE: 1.625 INCHES CENTER BULKHEAD IN
TECHNICAL CHARACTERISTICS (FLIS)
FURNISHED ITEMS AND QUANTITY1 BULKHEAD NUT
THREAD CLASS3A CENTER BULKHEAD A
CONNECTION TYPETHREADED EXTERNAL BOSS SECOND END
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF) CENTER BULKHEAD
CONNECTION STYLEFLARED (TUBE) FIRST END
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED1.250 INCHES FIRST END IN
NOMINAL THREAD SIZE1.625 INCHES CENTER BULKHEAD IN
SPECIFICATION/STANDARD DATA81343-AS4841 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NOMINAL OVERALL LENGTH3.310 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
AS5406-20Interchangeable
Same NIIN cross-reference
interchangeable
AS5406Interchangeable
Same NIIN cross-reference
interchangeable
AN832-20Interchangeable
Same NIIN cross-reference
interchangeable
AS4841Interchangeable
Same NIIN cross-reference
interchangeable
20-20 070601CAInterchangeable
Same NIIN cross-reference
interchangeable
MIL-F-5509Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN828-20?
AN828-20 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace AN828-20?
There are 7 known substitutes for AN828-20: AS5406-20, AS5406, AN832-20 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AN828-20?
AN828-20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-6419. 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