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Technical Data Sheet
PartsTable / COMPONENT / 503A1-62
503A1-62 ✓ 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 420 OVERALL, hole_diameter: 0.102 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN, hardness_rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM, outside_diameter: 0.212 INCHES NOMINAL IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: PASSIVATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-184-9138, 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
503A1-62
NSN: 5310-00-184-9138
FSC: 5310
CAGE: 94033 — CARDWELL CONDENSER CORP LAPOINTE-ADMIRAL DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 420 OVERALL
hole_diameter0.102 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
outside_diameter0.212 INCHES NOMINAL IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentPASSIVATE OVERALL
material_thickness0.031 INCHES MINIMUM IN
nondefinitive_spec/std_dataB CLASS AND 3 STYLE
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-184-9138
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 503A1-62 · 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
•
HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
•
HOLE DIAMETER: 0.102 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 420 OVERALL
•
OUTSIDE DIAMETER: 0.212 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.031 INCHES MINIMUM IN
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
TECHNICAL CHARACTERISTICS (FLIS)
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
HOLE DIAMETER0.102 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
MATERIALSTEEL COMP 420 OVERALL
OUTSIDE DIAMETER0.212 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL THICKNESS0.031 INCHES MINIMUM IN
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
NONDEFINITIVE SPEC/STD DATAB CLASS AND 3 STYLE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
70018Interchangeable
interchangeable cross-reference
interchangeable
541838Interchangeable
interchangeable cross-reference
interchangeable
FFW84CLASSBSTYLE3Interchangeable
interchangeable cross-reference
interchangeable
5006-12Interchangeable
interchangeable cross-reference
interchangeable
541839Interchangeable
interchangeable cross-reference
interchangeable
FF-W-84A CL B ST 3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 503A1-62?
503A1-62 is a WASHER,LOCK.
What parts can replace 503A1-62?
There are 7 known substitutes for 503A1-62: 70018, 541838, FFW84CLASSBSTYLE3 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 503A1-62?
503A1-62 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-184-9138. 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