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AN911-4 — Technical Data Sheet

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— · 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,PIPE TO BOSS is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, connection_type: THREADED EXTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, special_features: GRUMMAN AEROSPACE A-10 AIRCRAFT, style_designator: CENTER WRENCHING FACILITY, surface_treatment: CADMIUM OUTSIDE. This part is cataloged in the Federal Logistics Information System under NSN 4730-00-186-7800, 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
AN911-4
NSN: 4730-00-186-7800
FSC: 4730
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
connection_typeTHREADED EXTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
special_featuresGRUMMAN AEROSPACE A-10 AIRCRAFT
style_designatorCENTER WRENCHING FACILITY
surface_treatmentCADMIUM OUTSIDE
nominal_thread_size0.500 INCHES ALL ENDS IN
nominal_overall_length1.848 INCHES IN
thread_series_designatorANPT ALL ENDS
specification/standard_data81349-MIL-F-5509 GOVERNMENT SPECIFICATION
NSN4730-00-186-7800
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN911-4 · 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
•
SURFACE TREATMENT: CADMIUM OUTSIDE
•
SPECIFICATION/STANDARD DATA: 81349-MIL-F-5509 GOVERNMENT SPECIFICATION
•
NOMINAL THREAD SIZE: 0.500 INCHES ALL ENDS IN
•
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
•
STYLE DESIGNATOR: CENTER WRENCHING FACILITY
•
NOMINAL OVERALL LENGTH: 1.848 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
TECHNICAL CHARACTERISTICS
SURFACE TREATMENTCADMIUM OUTSIDE
SPECIFICATION/STANDARD DATA81349-MIL-F-5509 GOVERNMENT SPECIFICATION
NOMINAL THREAD SIZE0.500 INCHES ALL ENDS IN
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
STYLE DESIGNATORCENTER WRENCHING FACILITY
NOMINAL OVERALL LENGTH1.848 INCHES IN
SURFACE TREATMENTCADMIUM OUTSIDE
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
SPECIAL FEATURESGRUMMAN AEROSPACE A-10 AIRCRAFT
MATERIALCOPPER ALLOY OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
AS4860InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AS4842InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AN911-8InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AN911-3KInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AN911-2DInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
895D91InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN911-4?
AN911-4 is a ADAPTER,STRAIGHT,PIPE TO BOSS.
What parts can replace AN911-4?
There are 21 known substitutes for AN911-4: AS4860, AS4842, AN911-8 and 18 more. Substitute compatibility should be verified for your specific system.
Is AN911-4 still available?
AN911-4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026