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Technical Data Sheet
PartsTable / COMPONENT / 503B1-35
503B1-35 ✓ 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 OVERALL, hole_diameter: 0.141 INCHES MINIMUM AND 0.148 INCHES MAXIMUM IN, hardness_rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM, outside_diameter: 0.250 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, material_thickness: 0.031 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-010-6495, 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
503B1-35
NSN: 5310-00-010-6495
FSC: 5310
CAGE: 94033 — CARDWELL CONDENSER CORP LAPOINTE-ADMIRAL DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.141 INCHES MINIMUM AND 0.148 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
outside_diameter0.250 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
material_thickness0.031 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN
nondefinitive_spec/std_data2 STYLE AND A CLASS
material_document_and_classification-FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-010-6495
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 503B1-35 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: -FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.250 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
MATERIAL: STEEL OVERALL
•
MATERIAL THICKNESS: 0.031 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN
•
HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
•
HOLE DIAMETER: 0.141 INCHES MINIMUM AND 0.148 INCHES MAXIMUM IN
•
NONDEFINITIVE SPEC/STD DATA: 2 STYLE AND A CLASS
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATION-FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.250 INCHES MAXIMUM IN
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
MATERIALSTEEL OVERALL
MATERIAL THICKNESS0.031 INCHES MINIMUM AND 0.374 INCHES MAXIMUM IN
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
HOLE DIAMETER0.141 INCHES MINIMUM AND 0.148 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATA2 STYLE AND A CLASS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
90362Interchangeable
interchangeable cross-reference
interchangeable
31GCF-230-EInterchangeable
interchangeable cross-reference
interchangeable
90800Interchangeable
interchangeable cross-reference
interchangeable
90261Interchangeable
interchangeable cross-reference
interchangeable
54X595Interchangeable
Same NIIN cross-reference
interchangeable
43-9352-500-060Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 503B1-35?
503B1-35 is a WASHER,LOCK.
What parts can replace 503B1-35?
There are 8 known substitutes for 503B1-35: 90362, 31GCF-230-E, 90800 and 5 more. Substitute compatibility should be verified for your specific system.
Is 503B1-35 still available?
503B1-35 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026