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635001 ✓ 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

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: ALUMINUM, design_type: FRICTION, overall_diameter: 3.540 INCHES NOMINAL IN, inside_diameter_length: 0.620 INCHES NOMINAL IN, opening_inside_diameter_for_which_designed: 3.500 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-043-2759, 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
635001
NSN: 5315-00-043-2759
FSC: 5315
CAGE: 82471 — LENARD PACKAGING CO INC THE (USA)
SPECIFICATIONS
materialALUMINUM
design_typeFRICTION
overall_diameter3.540 INCHES NOMINAL IN
inside_diameter_length0.620 INCHES NOMINAL IN
opening_inside_diameter_for_which_designed3.500 INCHES NOMINAL IN
NSN5315-00-043-2759
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 635001 · 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
•
HEAD STYLE: FLAT
•
HEIGHT: 0.094 INCHES NOMINAL IN
•
DIAMETER: 0.250 INCHES NOMINAL IN
•
PIN CHAMFER ANGLE: 15.0 DEGREES NOMINAL
•
PIN HEAD DIAMETER: 0.375 INCHES NOMINAL IN
•
HOLE ARRANGEMENT STYLE: ONE END DRILLED
•
CHAMFER LENGTH: 0.062 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEFLAT
HEIGHT0.094 INCHES NOMINAL IN
DIAMETER0.250 INCHES NOMINAL IN
PIN CHAMFER ANGLE15.0 DEGREES NOMINAL
PIN HEAD DIAMETER0.375 INCHES NOMINAL IN
HOLE ARRANGEMENT STYLEONE END DRILLED
CHAMFER LENGTH0.062 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT
SURFACE TREATMENTPHOSPHATE OVERALL
UNDER HEAD LENGTH0.797 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
257-2621Interchangeable
interchangeable cross-reference
interchangeable
8-467708C91R6H3Interchangeable
interchangeable cross-reference
interchangeable
50902Interchangeable
interchangeable cross-reference
interchangeable
6350-01Interchangeable
interchangeable cross-reference
interchangeable
432759Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 635001?
635001 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 635001?
There are 5 known substitutes for 635001: 257-2621, 8-467708C91R6H3, 50902 and 2 more. Substitute compatibility should be verified for your specific system.
Is 635001 still available?
635001 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