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Technical Data Sheet
PartsTable / COMPONENT / SD4235
SD4235 ✓ 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 1060 OR STEEL COMP 1065 OR STEEL COMP 1070 OR STEEL COMP 1075 OR STEEL COMP 1080 OVERALL, hole_diameter: 0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN, outside_diameter: 0.494 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, style_designator: FLAT EXTERNAL TEETH, material_thickness: 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN, nondefinitive_spec/std_data: B TYPE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-011-4604, 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
SD4235
NSN: 5310-00-011-4604
FSC: 5310
CAGE: 35311 — AMERICAN STANDARD INC WESTINGHOUSE AIR BRAKE CO DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 1060 OR STEEL COMP 1065 OR STEEL COMP 1070 OR STEEL COMP 1075 OR STEEL COMP 1080 OVERALL
hole_diameter0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
outside_diameter0.494 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
style_designatorFLAT EXTERNAL TEETH
material_thickness0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
nondefinitive_spec/std_dataB TYPE
material_document_and_classification-QQ-S-633 CANC FED SPEC ALL MATERIAL RESPONSES OVERALL
NSN5310-00-011-4604
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SD4235 · 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
•
OUTSIDE DIAMETER: 0.494 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1060 OR STEEL COMP 1065 OR STEEL COMP 1070 OR STEEL COMP 1075 OR STEEL COMP 1080 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: -QQ-S-633 CANC FED SPEC ALL MATERIAL RESPONSES OVERALL
•
NONDEFINITIVE SPEC/STD DATA: B TYPE
•
STYLE DESIGNATOR: FLAT EXTERNAL TEETH
•
MATERIAL THICKNESS: 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.494 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
HOLE DIAMETER0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1060 OR STEEL COMP 1065 OR STEEL COMP 1070 OR STEEL COMP 1075 OR STEEL COMP 1080 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION-QQ-S-633 CANC FED SPEC ALL MATERIAL RESPONSES OVERALL
NONDEFINITIVE SPEC/STD DATAB TYPE
STYLE DESIGNATORFLAT EXTERNAL TEETH
MATERIAL THICKNESS0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
121753Interchangeable
interchangeable cross-reference
interchangeable
801625-551-003 PC NO 17AInterchangeable
interchangeable cross-reference
interchangeable
1114-13Interchangeable
interchangeable cross-reference
interchangeable
2358T2Interchangeable
interchangeable cross-reference
interchangeable
7521031Interchangeable
interchangeable cross-reference
interchangeable
914105Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SD4235?
SD4235 is a WASHER,LOCK.
What parts can replace SD4235?
There are 31 known substitutes for SD4235: 121753, 801625-551-003 PC NO 17A, 1114-13 and 28 more. Substitute compatibility should be verified for your specific system.
Is SD4235 still available?
SD4235 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