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Technical Data Sheet
PartsTable / COMPONENT / MS35756-20
MS35756-20 ✓ 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 KEY,WOODRUFF is a the manufacturer industrial component. Key specifications include material: STEEL COMP 2330 OR STEEL COMP 4130 OR STEEL COMP 8630 OVERALL, thickness: 0.2500 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN, key_height: 0.479 INCHES MINIMUM AND 0.484 INCHES MAXIMUM IN, shear_strength: 100000 SINGLE POUNDS PER SQUARE INCH, circle_diameter: 1.115 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-616-5501, 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
MS35756-20
NSN: 5315-00-616-5501
FSC: 5315
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialSTEEL COMP 2330 OR STEEL COMP 4130 OR STEEL COMP 8630 OVERALL
thickness0.2500 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN
key_height0.479 INCHES MINIMUM AND 0.484 INCHES MAXIMUM IN
shear_strength100000 SINGLE POUNDS PER SQUARE INCH
circle_diameter1.115 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
style_designatorROUND BOTTOM
starting_edge_shapeSTRAIGHT
key_size_designationWOODRUFF 18
NSN5315-00-616-5501
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS35756-20 · 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
•
THICKNESS: 0.2500 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
•
STYLE DESIGNATOR: ROUND BOTTOM
•
KEY SIZE DESIGNATION: WOODRUFF 18
•
SHEAR STRENGTH: 100000 SINGLE POUNDS PER SQUARE INCH
•
KEY HEIGHT: 0.479 INCHES MINIMUM AND 0.484 INCHES MAXIMUM IN
•
STARTING EDGE SHAPE: STRAIGHT
•
CIRCLE DIAMETER: 1.115 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.2500 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
STYLE DESIGNATORROUND BOTTOM
KEY SIZE DESIGNATIONWOODRUFF 18
SHEAR STRENGTH100000 SINGLE POUNDS PER SQUARE INCH
KEY HEIGHT0.479 INCHES MINIMUM AND 0.484 INCHES MAXIMUM IN
STARTING EDGE SHAPESTRAIGHT
CIRCLE DIAMETER1.115 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
MATERIALSTEEL COMP 2330 OR STEEL COMP 4130 OR STEEL COMP 8630 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
434871R91Interchangeable
interchangeable cross-reference
interchangeable
P550552Interchangeable
interchangeable cross-reference
interchangeable
FULK1508Interchangeable
interchangeable cross-reference
interchangeable
S30-2Interchangeable
interchangeable cross-reference
interchangeable
S303PInterchangeable
interchangeable cross-reference
interchangeable
5018367-032Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS35756-20?
MS35756-20 is a KEY,WOODRUFF.
What parts can replace MS35756-20?
There are 6 known substitutes for MS35756-20: 434871R91, P550552, FULK1508 and 3 more. Substitute compatibility should be verified for your specific system.
Is MS35756-20 still available?
MS35756-20 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