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Technical Data Sheet
PartsTable / MRO / 43-1781
43-1781 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

CAPACITOR,FIXED,PLASTIC DIELECTR. Key specifications include diameter: 0.125 INCHES NOMINAL IN, material: LEATHER SEALING ELEMENT, body_style: W/O MTG FACILITIES TERMINAL(S) ON ONE SURFACE, body_width: 0.310 INCHES NOMINAL IN, case_style: SQUARE, seal_width: 0.750 INCHES NOMINAL 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 5315-00-043-1781, 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
MRO→ MRO_GENERAL→ 43-1781
NSN: 5315-00-043-1781
FSC: 5315
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
diameter0.125 INCHES NOMINAL IN
materialLEATHER SEALING ELEMENT
body_styleW/O MTG FACILITIES TERMINAL(S) ON ONE SURFACE
body_width0.310 INCHES NOMINAL IN
case_styleSQUARE
seal_width0.750 INCHES NOMINAL IN
body_height0.187 INCHES NOMINAL IN
body_length0.562 INCHES NOMINAL IN
terminal_length1.000 INCHES NOMINAL IN
style_designatorSTANDARD
underloop_length1.000 INCHES NOMINAL IN
terminal_diameter0.032 INCHES NOMINAL IN
NSN5315-00-043-1781
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 43-1781 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
STYLE DESIGNATOR: STANDARD
•
DIAMETER: 0.125 INCHES NOMINAL IN
•
UNDERLOOP LENGTH: 1.000 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY OVERALL
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 DESIGNATORSTANDARD
DIAMETER0.125 INCHES NOMINAL IN
UNDERLOOP LENGTH1.000 INCHES NOMINAL IN
MATERIALCOPPER ALLOY OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
601PE1039-5W2Interchangeable
interchangeable cross-reference
interchangeable
7743505P001Interchangeable
interchangeable cross-reference
interchangeable
431781Interchangeable
interchangeable cross-reference
interchangeable
48943Interchangeable
interchangeable cross-reference
interchangeable
94414Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 43-1781?
43-1781 is a CAPACITOR,FIXED,PLASTIC DIELECTR. It is classified as a MRO (MRO_GENERAL).
What parts can replace 43-1781?
There are 5 known substitutes for 43-1781: 601PE1039-5W2, 7743505P001, 431781 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 43-1781?
43-1781 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-043-1781. 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