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Technical Data Sheet
PartsTable / COMPONENT / MS35756-3
MS35756-3 ✓ 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 4130 OR STEEL COMP 8630 OVERALL, thickness: 0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN, key_height: 0.167 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN, circle_diameter: 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, hardness_rating: 45.0 ROCKWELL C MAXIMUM OVERALL, style_designator: ROUND BOTTOM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-687-5218, 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
MS35756-3
NSN: 5315-00-687-5218
FSC: 5315
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 4130 OR STEEL COMP 8630 OVERALL
thickness0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
key_height0.167 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
circle_diameter0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MAXIMUM OVERALL
style_designatorROUND BOTTOM
starting_edge_shapeROUND
key_size_designationWOODRUFF 213
starting_edge_radius0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
end_item_identificationMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
NSN5315-00-687-5218
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS35756-3 · 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
•
CIRCLE DIAMETER: 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
KEY HEIGHT: 0.167 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
•
KEY SIZE DESIGNATION: WOODRUFF 213
•
STARTING EDGE SHAPE: ROUND
•
STYLE DESIGNATOR: ROUND BOTTOM
•
THICKNESS: 0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 4130 OR STEEL COMP 8630 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CIRCLE DIAMETER0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
KEY HEIGHT0.167 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
KEY SIZE DESIGNATIONWOODRUFF 213
STARTING EDGE SHAPEROUND
STYLE DESIGNATORROUND BOTTOM
THICKNESS0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
MATERIALSTEEL COMP 4130 OR STEEL COMP 8630 OVERALL
STARTING EDGE RADIUS0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
HARDNESS RATING45.0 ROCKWELL C MAXIMUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
271089Interchangeable
interchangeable cross-reference
interchangeable
KY1006Interchangeable
interchangeable cross-reference
interchangeable
K16Interchangeable
interchangeable cross-reference
interchangeable
521000Interchangeable
interchangeable cross-reference
interchangeable
1-8X3-16Interchangeable
interchangeable cross-reference
interchangeable
214RInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS35756-3?
MS35756-3 is a KEY,WOODRUFF.
What parts can replace MS35756-3?
There are 19 known substitutes for MS35756-3: 271089, KY1006, K16 and 16 more. Substitute compatibility should be verified for your specific system.
Is MS35756-3 still available?
MS35756-3 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