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301-0256 ✓ 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 REDUCER,TUBE is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, outside_diameter: 0.484 INCHES MINIMUM AND 0.506 INCHES MAXIMUM IN, center_hole_diameter: 0.346 INCHES MINIMUM AND 0.356 INCHES MAXIMUM IN, cross-sectional_height: 0.069 INCHES MINIMUM AND 0.075 INCHES MAXIMUM 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 4730-00-010-2774, 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
301-0256
NSN: 4730-00-010-2774
FSC: 4730
CAGE: 93568 — HARSCO CORP BMY-COMBAT SYSTEMS DIV (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter0.484 INCHES MINIMUM AND 0.506 INCHES MAXIMUM IN
center_hole_diameter0.346 INCHES MINIMUM AND 0.356 INCHES MAXIMUM IN
cross-sectional_height0.069 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
NSN4730-00-010-2774
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 301-0256 · 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 CLASS: 2A SECOND END A
•
CONNECTION STYLE: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
•
REDUCER TYPE: CONCENTRIC
•
MATERIAL: STEEL OVERALL
•
SEAT ANGLE: 37.0 DEGREES SECOND END
•
NOMINAL THREAD SIZE: 0.562 INCHES SECOND END IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2A SECOND END A
CONNECTION STYLESWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
THREAD CLASS2B FIRST END
REDUCER TYPECONCENTRIC
MATERIALSTEEL OVERALL
SEAT ANGLE37.0 DEGREES SECOND END
NOMINAL THREAD SIZE0.562 INCHES SECOND END IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
THREAD SERIES DESIGNATORUNF FIRST END
THREAD SERIES DESIGNATORUNF SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
MS29512-04Interchangeable
interchangeable cross-reference
interchangeable
269-78REVAPC27Interchangeable
interchangeable cross-reference
interchangeable
GA1070Interchangeable
interchangeable cross-reference
interchangeable
J514Interchangeable
interchangeable cross-reference
interchangeable
MS51534A8-6Interchangeable
interchangeable cross-reference
interchangeable
8-6TRBTX-SInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 301-0256?
301-0256 is a REDUCER,TUBE.
What parts can replace 301-0256?
There are 8 known substitutes for 301-0256: MS29512-04, 269-78REVAPC27, GA1070 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 301-0256?
301-0256 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-010-2774. 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