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518862 — COVER,ACCESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

518862: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2014 OVERALL, hole_diameter: 0.350 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN, heat_treatment: T-6 SOLUTION HEAT TREATED, ARTIFICALLY AGED, hardness_rating: 78.0 ROCKWELL B NOMINAL, shoulder_height: 0.050 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN, outside_diameter: 0.555 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-558-9304, 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
518862
NSN: 5310-00-558-9304
NIINs: 005589304, 012256861
FSC: 5310 — Nuts and Washers
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2014 OVERALL
hole_diameter0.350 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
heat_treatmentT-6 SOLUTION HEAT TREATED, ARTIFICALLY AGED
hardness_rating78.0 ROCKWELL B NOMINAL
shoulder_height0.050 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
outside_diameter0.555 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN
style_designatorSHOULDERED
shoulder_diameter0.485 INCHES MINIMUM AND 0.489 INCHES MAXIMUM IN
surface_treatmentANODIZE OVERALL
material_thickness0.020 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
material_document_and_classificationQQ-A-225/4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationAMS2470 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-558-9304
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 518862 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS2470 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER HEIGHT: 0.050 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
•
HEAT TREATMENT: T-6 SOLUTION HEAT TREATED, ARTIFICALLY AGED
•
HARDNESS RATING: 78.0 ROCKWELL B NOMINAL
•
STYLE DESIGNATOR: SHOULDERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.555 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.020 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS2470 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SHOULDER HEIGHT0.050 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
HEAT TREATMENTT-6 SOLUTION HEAT TREATED, ARTIFICALLY AGED
HARDNESS RATING78.0 ROCKWELL B NOMINAL
STYLE DESIGNATORSHOULDERED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.555 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN
MATERIAL THICKNESS0.020 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
SHOULDER DIAMETER0.485 INCHES MINIMUM AND 0.489 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE OVERALL
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 518862?
518862 is a COVER,ACCESS.
What is the NSN for 518862?
518862 is cataloged in the U.S. Government catalog under NSN 5310-00-558-9304. This indicates validated use in U.S. government and defense supply chains.
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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.