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506878 — COVER,ELECTRONIC COMMUNICATION E

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

506878: COVER,ELECTRONIC COMMUNICATION E.

COVER,ELECTRONIC COMMUNICATION E. Key specifications include material: ALUMINUM ALLOY, nut_style: PLATE, nut_height: 0.405 INCHES NOMINAL IN, nut_length: 0.609 INCHES NOMINAL IN, plate_width: 1.555 INCHES NOMINAL IN, thread_class: 2B. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-915-9918, 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→ 506878
NSN: 5310-00-915-9918
NIINs: 009159918, 013395518, 015285026
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
nut_stylePLATE
nut_height0.405 INCHES NOMINAL IN
nut_length0.609 INCHES NOMINAL IN
plate_width1.555 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
locking_featurePREVAILING TORQUE ALL METAL DESIGN
plate_thickness0.061 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_size0.190 INCHES IN
mounting_hole_diameter0.250 INCHES NOMINAL IN
NSN5310-00-915-9918
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 506878 · 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
•
PLATE THICKNESS: 0.061 INCHES NOMINAL IN
•
NUT LENGTH: 0.609 INCHES NOMINAL IN
•
DISTANCE FROM MOUNTING HOLE CENTER TO BASE: 0.375 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
PLATE WIDTH: 1.555 INCHES NOMINAL IN
•
MOUNTING HOLE ARRANGEMENT STYLE: 2 HOLES
•
DISTANCE FROM BASE TO CENTER OF APERTURE: 0.875 INCHES NOMINAL IN
•
MOUNTING HOLE DIAMETER: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
PLATE THICKNESS0.061 INCHES NOMINAL IN
NUT LENGTH0.609 INCHES NOMINAL IN
DISTANCE FROM MOUNTING HOLE CENTER TO BASE0.375 INCHES NOMINAL IN
THREAD SERIESUNF
PLATE WIDTH1.555 INCHES NOMINAL IN
MOUNTING HOLE ARRANGEMENT STYLE2 HOLES
DISTANCE FROM BASE TO CENTER OF APERTURE0.875 INCHES NOMINAL IN
MOUNTING HOLE DIAMETER0.250 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG WIDTH1.125 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 506878?
506878 is a COVER,ELECTRONIC COMMUNICATION E. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 506878?
506878 is cataloged in the U.S. Government catalog under NSN 5310-00-915-9918. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.