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05-378300 — COVER,ACCESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

05-378300: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include hole_diameter: 0.188 INCHES NOMINAL IN, outside_diameter: 0.562 INCHES NOMINAL IN, style_designator: SHOULDERED AND RECESSED, shoulder_diameter: 0.312 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-505-7760, 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
05-378300
NSN: 5310-00-505-7760
NIINs: 005057760, 012014715
FSC: 5310 — Nuts and Washers
CAGE: 31435 — LUCAS AEROSPACE POWER EQUIPMENT CORPORATION (USA)
SPECIFICATIONS
hole_diameter0.188 INCHES NOMINAL IN
outside_diameter0.562 INCHES NOMINAL IN
style_designatorSHOULDERED AND RECESSED
shoulder_diameter0.312 INCHES NOMINAL IN
NSN5310-00-505-7760
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 05-378300 · 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: SHOULDERED AND RECESSED
•
OUTSIDE DIAMETER: 0.562 INCHES NOMINAL IN
•
SHOULDER DIAMETER: 0.312 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.188 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSHOULDERED AND RECESSED
OUTSIDE DIAMETER0.562 INCHES NOMINAL IN
SHOULDER DIAMETER0.312 INCHES NOMINAL IN
HOLE DIAMETER0.188 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
A32927Reference document
Same NSN cross-reference
Reference document — Secondary reference
AC490-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 05-378300?
05-378300 is a COVER,ACCESS.
What parts can replace 05-378300?
There are 2 known substitutes for 05-378300: A32927, AC490-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 05-378300?
05-378300 is cataloged in the U.S. Government catalog under NSN 5310-00-505-7760. 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.