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981766 ✓ 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

CAPACITOR,FIXED,PAPER DIELECTRIC. Key specifications include material: TITANIUM OVERALL, overall_length: 44.0 MILLIMETERS NOMINAL MM, special_features: BLUE; LOCKING BOLT; FOR USE WITH SOLID TITANIUM TIBIAL AND HUMERAL INTRAMEDULLARY NAIL, outside_thread_diameter: 3.9 MILLIMETERS NOMINAL MM, part_name_assigned_by_controlling_agency: BOLT TIBIAL ORTHO3.9MM O/S THREAD DIA 44MM O/A LG BLUE LOCK BOLT MM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-050-4205, 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
981766
NSN: 4730-00-050-4205
FSC: 4730
CAGE: F6137 — SAFRAN LANDING SYSTEMS (FRA)
SPECIFICATIONS
materialTITANIUM OVERALL
overall_length44.0 MILLIMETERS NOMINAL MM
special_featuresBLUE; LOCKING BOLT; FOR USE WITH SOLID TITANIUM TIBIAL AND HUMERAL INTRAMEDULLARY NAIL
outside_thread_diameter3.9 MILLIMETERS NOMINAL MM
part_name_assigned_by_controlling_agencyBOLT TIBIAL ORTHO3.9MM O/S THREAD DIA 44MM O/A LG BLUE LOCK BOLT MM
NSN4730-00-050-4205
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 981766 · 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
•
STYLE DESIGNATOR: ANGLE
•
HEIGHT: 0.812 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
ASSEMBLY CLEARANCE RADIUS: 0.406 INCHES MAXIMUM IN
•
ANGLE: 45.0 DEGREES
•
SCREW THREAD SERIES DESIGNATOR: SAE-LT
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORANGLE
SPECIAL FEATURESGRUMMAN A10 AIRCRAFT
HEIGHT0.812 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.250 INCHES IN
ASSEMBLY CLEARANCE RADIUS0.406 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONMRAP BUFFALO MK2A2
ANGLE45.0 DEGREES
SCREW THREAD SERIES DESIGNATORSAE-LT
THREAD QUANTITY PER INCH28
WIDTH ACROSS FLATS0.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 32
S6127-61801-3Interchangeable
interchangeable cross-reference
interchangeable
21670Interchangeable
interchangeable cross-reference
interchangeable
21937Interchangeable
interchangeable cross-reference
interchangeable
122-660345 PC 30Interchangeable
interchangeable cross-reference
interchangeable
200954Interchangeable
interchangeable cross-reference
interchangeable
122-5277738 ITEM 33Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 981766?
981766 is a CAPACITOR,FIXED,PAPER DIELECTRIC.
What parts can replace 981766?
There are 32 known substitutes for 981766: S6127-61801-3, 21670, 21937 and 29 more. Substitute compatibility should be verified for your specific system.
Is 981766 still available?
981766 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: July 2026