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B-4-CN — Technical Data Sheet

✓ 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 NIPPLE,PIPE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY AND STEEL OVERALL, connection_type: THREADED EXTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: CENTER WRENCHING FACILITY, nominal_thread_size: 0.250 INCHES ALL ENDS IN, nominal_overall_length: 1.120 INCHES IN. This part is cataloged in the Federal Logistics Information System under NSN 4730-01-339-4642, 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
B-4-CN
NSN: 4730-01-339-4642
FSC: 4730
CAGE: 3T9T9 — SWAGELOK CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY AND STEEL OVERALL
connection_typeTHREADED EXTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorCENTER WRENCHING FACILITY
nominal_thread_size0.250 INCHES ALL ENDS IN
nominal_overall_length1.120 INCHES IN
thread_series_designatorNPT ALL ENDS
reduced_passage_nominal_inside_diameter0.280 INCHES ALL ENDS IN
NSN4730-01-339-4642
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: B-4-CN · 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: NPT ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
•
MATERIAL: COPPER ALLOY AND STEEL OVERALL
•
STYLE DESIGNATOR: CENTER WRENCHING FACILITY
•
NOMINAL OVERALL LENGTH: 1.120 INCHES IN
•
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
•
REDUCED PASSAGE NOMINAL INSIDE DIAMETER: 0.280 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 0.250 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
THREAD SERIES DESIGNATORNPT ALL ENDS
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
MATERIALCOPPER ALLOY AND STEEL OVERALL
STYLE DESIGNATORCENTER WRENCHING FACILITY
NOMINAL OVERALL LENGTH1.120 INCHES IN
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
REDUCED PASSAGE NOMINAL INSIDE DIAMETER0.280 INCHES ALL ENDS IN
NOMINAL THREAD SIZE0.250 INCHES ALL ENDS IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
09485-3-15InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MPR9576-18A22InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
1867767InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
51-1835InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
51-1835-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
4CN 1/4 BRASSInterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B-4-CN?
B-4-CN is a NIPPLE,PIPE.
What parts can replace B-4-CN?
There are 6 known substitutes for B-4-CN: 09485-3-15, MPR9576-18A22, 1867767 and 3 more. Substitute compatibility should be verified for your specific system.
Is B-4-CN still available?
B-4-CN 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: October 2026