PartsTable
Technical Data Sheet
C681551-4 ✓ 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 BEARING,ROLLER,TAPERED is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: COPPER ALLOY OVERALL, connection_type: THREADED INTERNAL PIPE FIRST END, connection_style: PLAIN (PIPE) FIRST END, style_designator: GROOVED AND THREADED INTERNAL, mounting_end_type: FLAT, nominal_thread_size: 0.750 INCHES FIRST END 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 4730-00-882-9956, 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
C681551-4
NSN: 4730-00-882-9956
FSC: 4730
CAGE: 06845 — RAYTHEON COMPANY DBA RAYTHEON CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
connection_typeTHREADED INTERNAL PIPE FIRST END
connection_stylePLAIN (PIPE) FIRST END
style_designatorGROOVED AND THREADED INTERNAL
mounting_end_typeFLAT
nominal_thread_size0.750 INCHES FIRST END IN
nominal_overall_length1.906 INCHES IN
thread_series_designatorNPT FIRST END
material_document_and_classificationQQ-B-1005,COMP 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4730-00-882-9956
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: C681551-4 · 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
NOMINAL OVERALL LENGTH: 1.906 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-1005,COMP 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CONNECTION STYLE: PLAIN (PIPE) FIRST END
STYLE DESIGNATOR: GROOVED AND THREADED INTERNAL
NOMINAL THREAD SIZE: 0.750 INCHES FIRST END IN
CONNECTION TYPE: THREADED INTERNAL PIPE FIRST END
MATERIAL: COPPER ALLOY OVERALL
THREAD SERIES DESIGNATOR: NPT FIRST END
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL OVERALL LENGTH1.906 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-1005,COMP 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CONNECTION STYLEPLAIN (PIPE) FIRST END
STYLE DESIGNATORGROOVED AND THREADED INTERNAL
NOMINAL THREAD SIZE0.750 INCHES FIRST END IN
CONNECTION TYPETHREADED INTERNAL PIPE FIRST END
MATERIALCOPPER ALLOY OVERALL
THREAD SERIES DESIGNATORNPT FIRST END
MOUNTING END TYPEFLAT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
M205Interchangeable
interchangeable cross-reference
interchangeable
UTDM205Interchangeable
interchangeable cross-reference
interchangeable
703234Interchangeable
interchangeable cross-reference
interchangeable
703-2 3/4Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C681551-4?
C681551-4 is a BEARING,ROLLER,TAPERED.
What parts can replace C681551-4?
There are 4 known substitutes for C681551-4: M205, UTDM205, 703234 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C681551-4?
C681551-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-882-9956. This indicates validated use in U.S. government and defense supply chains.
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