PartsTable
Technical Data Sheet
HS4751 ✓ 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: TITANIUM ALLOY OVERALL, seat_angle: 12.0 DEGREES FIRST END, thread_class: 3A ALL ENDS A, connection_type: THREADED EXTERNAL TUBE ALL ENDS, connection_style: FLARELESS (TUBE) FIRST END, nominal_thread_size: 1.312 INCHES FIRST END IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-536-2270, 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
HS4751
NSN: 4730-00-536-2270
FSC: 4730
CAGE: 02731 — MCDONNELL DOUGLAS HELICOPTER CO INC (USA)
SPECIFICATIONS
materialTITANIUM ALLOY OVERALL
seat_angle12.0 DEGREES FIRST END
thread_class3A ALL ENDS A
connection_typeTHREADED EXTERNAL TUBE ALL ENDS
connection_styleFLARELESS (TUBE) FIRST END
nominal_thread_size1.312 INCHES FIRST END IN
nominal_overall_length1.478 INCHES IN
end_item_identification05A HELICOPTER, CHINOOK, CH-47 A
media_for_which_designedFLUID SINGLE RESPONSE
thread_quantity_per_inch12 FIRST END
thread_series_designatorUNIFIED NATIONAL JOINT (UNJ) FIRST END
material_document_and_classificationAMS4965 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967,130 KSI UTS MIN ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN4730-00-536-2270
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: HS4751 · 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: UNIFIED NATIONAL JOINT (UNJ) FIRST END
MATERIAL DOCUMENT AND CLASSIFICATION: AMS4965 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967,130 KSI UTS MIN ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD CLASS: 3A ALL ENDS A
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 1.000 INCHES FIRST END IN
MEDIA FOR WHICH DESIGNED: FLUID SINGLE RESPONSE
THREAD QUANTITY PER INCH: 12 FIRST END
NOMINAL THREAD SIZE: 1.250 INCHES SECOND END IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT (UNJ) FIRST END
MATERIAL DOCUMENT AND CLASSIFICATIONAMS4965 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967,130 KSI UTS MIN ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATORUNJEF SECOND END
THREAD CLASS3A ALL ENDS A
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED1.000 INCHES FIRST END IN
MEDIA FOR WHICH DESIGNEDFLUID SINGLE RESPONSE
THREAD QUANTITY PER INCH12 FIRST END
NOMINAL THREAD SIZE1.250 INCHES SECOND END IN
SEAT ANGLE12.0 DEGREES FIRST END
CONNECTION STYLEFLARELESS (TUBE) FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
5961PL0900818Interchangeable
interchangeable cross-reference
interchangeable
414826-12Interchangeable
interchangeable cross-reference
interchangeable
A7367Interchangeable
interchangeable cross-reference
interchangeable
HS4751-16Interchangeable
Same NIIN cross-reference
interchangeable
386557Interchangeable
Same NIIN cross-reference
interchangeable
RF9916-13Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HS4751?
HS4751 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace HS4751?
There are 6 known substitutes for HS4751: 5961PL0900818, 414826-12, A7367 and 3 more. Substitute compatibility should be verified for your specific system.
Is HS4751 still available?
HS4751 is currently cancelled.
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