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PartsTable / COMPONENT / 501643-1
501643-1 ✓ 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,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1006 OVERALL, thickness: 0.060 INCHES NOMINAL IN, hole_diameter: 0.993 INCHES MINIMUM AND 1.007 INCHES MAXIMUM IN, overall_diameter: 1.354 INCHES MINIMUM AND 1.359 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-735-1093, 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
501643-1
NSN: 5310-00-735-1093
FSC: 5310
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP 1006 OVERALL
thickness0.060 INCHES NOMINAL IN
hole_diameter0.993 INCHES MINIMUM AND 1.007 INCHES MAXIMUM IN
overall_diameter1.354 INCHES MINIMUM AND 1.359 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationMIL-S-11310 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-735-1093
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 501643-1 · 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
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-11310 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 1006 OVERALL
•
HOLE DIAMETER: 0.993 INCHES MINIMUM AND 1.007 INCHES MAXIMUM IN
•
OVERALL DIAMETER: 1.354 INCHES MINIMUM AND 1.359 INCHES MAXIMUM IN
•
THICKNESS: 0.060 INCHES NOMINAL IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL SHAPE STYLEROUND
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-11310 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 1006 OVERALL
HOLE DIAMETER0.993 INCHES MINIMUM AND 1.007 INCHES MAXIMUM IN
OVERALL DIAMETER1.354 INCHES MINIMUM AND 1.359 INCHES MAXIMUM IN
THICKNESS0.060 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
661120Interchangeable
interchangeable cross-reference
interchangeable
312-12Interchangeable
interchangeable cross-reference
interchangeable
2530007351093Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 501643-1?
501643-1 is a WASHER,FLAT.
What parts can replace 501643-1?
There are 3 known substitutes for 501643-1: 661120, 312-12, 2530007351093. Substitute compatibility should be verified for your specific system.
Is 501643-1 still available?
501643-1 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