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Technical Data Sheet
PartsTable / COMPONENT / 1 1/4X3/4 PTR-B
1 1/4X3/4 PTR-B ✓ 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 1 1/4X3/4 PTR-B is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-254-0330, 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
1 1/4X3/4 PTR-B
NSN: 4730-01-254-0330
FSC: 4730
CAGE: 30780 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV TUBE FITTINGS DIVISION (USA)
SPECIFICATIONS
Part Number1 1/4X3/4 PTR-B
NSN4730-01-254-0330
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1 1/4X3/4 PTR-B · 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
•
INTERNAL THREAD SIZE: 3/4-14
•
EXTERNAL SCREW THREAD SERIES DESIGNATOR: NPTF
•
MATERIAL: COPPER ALLOY
•
INTERNAL THREAD DIRECTION: RIGHT-HAND
•
EXTERNAL THREAD DIRECTION: RIGHT-HAND
•
STYLE DESIGNATOR: OUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL)
•
INTERNAL SCREW THREAD SERIES DESIGNATOR: NPTF
•
EXTERNAL THREAD SIZE: 1 1/4-11-1/2
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL THREAD SIZE3/4-14
EXTERNAL SCREW THREAD SERIES DESIGNATORNPTF
MATERIALCOPPER ALLOY
INTERNAL THREAD DIRECTIONRIGHT-HAND
EXTERNAL THREAD DIRECTIONRIGHT-HAND
STYLE DESIGNATOROUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL)
INTERNAL SCREW THREAD SERIES DESIGNATORNPTF
EXTERNAL THREAD SIZE1 1/4-11-1/2
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
AN912-8Interchangeable
interchangeable cross-reference
interchangeable
45B2344Interchangeable
interchangeable cross-reference
interchangeable
SAE-J530Interchangeable
interchangeable cross-reference
interchangeable
8-2 130140BInterchangeable
interchangeable cross-reference
interchangeable
110-DAInterchangeable
interchangeable cross-reference
interchangeable
25-242Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1 1/4X3/4 PTR-B?
1 1/4X3/4 PTR-B is a 1 1/4X3/4 PTR-B.
What parts can replace 1 1/4X3/4 PTR-B?
There are 15 known substitutes for 1 1/4X3/4 PTR-B: AN912-8, 45B2344, SAE-J530 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1 1/4X3/4 PTR-B?
1 1/4X3/4 PTR-B is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-254-0330. 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