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Technical Data Sheet
PartsTable / COMPONENT / M05-6163555
M05-6163555 ✓ Verified by PartsTable
— · NUT WASHER
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

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 410 OVERALL, hole_diameter: 0.141 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM, outside_diameter: 0.275 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-616-3555, 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
M05-6163555
NSN: 5310-00-616-3555
FSC: 5310
CAGE: 53774 — MISCO INC (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OVERALL
hole_diameter0.141 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
outside_diameter0.275 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentPASSIVATE OVERALL
material_thickness0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
end_item_identificationMULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-35,TY 2 OR TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-616-3555
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M05-6163555 · 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: QQ-P-35,TY 2 OR TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.275 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35,TY 2 OR TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.275 INCHES MINIMUM AND 0.295 INCHES MAXIMUM IN
MATERIAL THICKNESS0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN
STYLE DESIGNATORFLAT INTERNAL TEETH
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP 410 OVERALL
HOLE DIAMETER0.141 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
1224Interchangeable
interchangeable cross-reference
interchangeable
1229G423Interchangeable
interchangeable cross-reference
interchangeable
115551Interchangeable
interchangeable cross-reference
interchangeable
5310PL0652572Interchangeable
interchangeable cross-reference
interchangeable
MS35333-33Interchangeable
interchangeable cross-reference
interchangeable
MILW6986Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M05-6163555?
M05-6163555 is a WASHER,LOCK.
What parts can replace M05-6163555?
There are 28 known substitutes for M05-6163555: 1224, 1229G423, 115551 and 25 more. Substitute compatibility should be verified for your specific system.
Is M05-6163555 still available?
M05-6163555 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026