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811HT5D ✓ 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

MOUNTING PAD,ELECTRICAL-ELECTRON. Key specifications include material: ALUMINUM ALLOY OVERALL, seat_angle: 37.0 DEGREES ALL ENDS, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE ALL ENDS, special_features: SUPPORTS GRUMMAN A10 AIRCRAFT, surface_treatment: ANODIZE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-8460, 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
811HT5D
NSN: 4730-00-278-8460
FSC: 4730
CAGE: 80049 — DEPARTMENT OF THE AIR FORCE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
seat_angle37.0 DEGREES ALL ENDS
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
special_featuresSUPPORTS GRUMMAN A10 AIRCRAFT
surface_treatmentANODIZE OVERALL
nominal_thread_size0.500 INCHES ALL ENDS IN
maximum_operating_temp225.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length1.250 INCHES IN
media_for_which_designedHYDRAULIC FLUID SINGLE RESPONSE
thread_series_designatorUNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS
specification/standard_data81343-AS5174 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN4730-00-278-8460
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 811HT5D · 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
•
THREAD SERIES DESIGNATOR: UNF ALL ENDS
•
THREAD CLASS: 3A ALL ENDS A
•
SURFACE TREATMENT: ANODIZE OUTSIDE
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.313 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.500 INCHES ALL ENDS IN
•
MATERIAL: ALUMINUM ALLOY OVERALL
•
STYLE DESIGNATOR: FLARED W/ CENTER WRENCHING FACILITY
•
NOMINAL OVERALL LENGTH: 1.406 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNF ALL ENDS
THREAD CLASS3A ALL ENDS A
SURFACE TREATMENTANODIZE OUTSIDE
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.313 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.500 INCHES ALL ENDS IN
MATERIALALUMINUM ALLOY OVERALL
STYLE DESIGNATORFLARED W/ CENTER WRENCHING FACILITY
NOMINAL OVERALL LENGTH1.406 INCHES IN
SURFACE TREATMENTANODIZE INSIDE
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
AS5174Interchangeable
interchangeable cross-reference
interchangeable
AS4841Interchangeable
interchangeable cross-reference
interchangeable
AS5174D0505Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 811HT5D?
811HT5D is a MOUNTING PAD,ELECTRICAL-ELECTRON.
What parts can replace 811HT5D?
There are 3 known substitutes for 811HT5D: AS5174, AS4841, AS5174D0505. Substitute compatibility should be verified for your specific system.
What is the NSN for 811HT5D?
811HT5D is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-8460. 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