PartsTable
Technical Data Sheet
X43-3 ✓ 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

NONMETALLIC SPECIAL SHAPED SECTI. Key specifications include material: RUBBER CHLOROPRENE CLASS CR, thickness: 0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN, key_height: 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, first_diameter: 0.187 INCHES NOMINAL IN, circle_diameter: 0.615 INCHES MINIMUM AND 0.625 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 5315-00-616-5526, 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
X43-3
NSN: 5315-00-616-5526
FSC: 5315
CAGE: 55469 — ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR
thickness0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
key_height0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
first_diameter0.187 INCHES NOMINAL IN
circle_diameter0.615 INCHES MINIMUM AND 0.625 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 5
first_slot/groove_depth0.125 INCHES NOMINAL IN
first_slot/groove_width0.031 INCHES NOMINAL IN
environmental_protectionLOW TEMPERATURE AND OZONE RESISTANT AND PETROLEUM RESISTANT AND WEATHER RESISTANT
NSN5315-00-616-5526
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: X43-3 · 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
KEY HEIGHT: 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
STARTING EDGE SHAPE: STRAIGHT
MATERIAL: STEEL COMP 2330 OR STEEL COMP 4130 OR STEEL COMP 8630 OVERALL
STYLE DESIGNATOR: ROUND BOTTOM
KEY SIZE DESIGNATION: WOODRUFF 5
CIRCLE DIAMETER: 0.615 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
THICKNESS: 0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
KEY HEIGHT0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
STARTING EDGE SHAPESTRAIGHT
MATERIALSTEEL COMP 2330 OR STEEL COMP 4130 OR STEEL COMP 8630 OVERALL
STYLE DESIGNATORROUND BOTTOM
KEY SIZE DESIGNATIONWOODRUFF 5
CIRCLE DIAMETER0.615 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
THICKNESS0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
T-244-MInterchangeable
interchangeable cross-reference
interchangeable
72-700476-1Interchangeable
interchangeable cross-reference
interchangeable
MS35431-3Interchangeable
interchangeable cross-reference
interchangeable
1B8704Interchangeable
interchangeable cross-reference
interchangeable
11992Interchangeable
interchangeable cross-reference
interchangeable
CR5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is X43-3?
X43-3 is a NONMETALLIC SPECIAL SHAPED SECTI.
What parts can replace X43-3?
There are 24 known substitutes for X43-3: T-244-M, 72-700476-1, MS35431-3 and 21 more. Substitute compatibility should be verified for your specific system.
Is X43-3 still available?
X43-3 is currently cancelled.
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