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Technical Data Sheet
PartsTable / COMPONENT / X404
X404 ✓ 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 RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, duty_type: CONTINUOUS, thickness: 0.125 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN, key_height: 0.125 INCHES NOMINAL IN, overall_width: 1.180 INCHES NOMINAL IN, overall_height: 1.710 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-234-7043, 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
X404
NSN: 5315-00-234-7043
FSC: 5315
CAGE: 54641 — LEAR SIEGLER INC SHERWOOD DIV (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
duty_typeCONTINUOUS
thickness0.125 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
key_height0.125 INCHES NOMINAL IN
coil_quantity1
overall_width1.180 INCHES NOMINAL IN
overall_height1.710 INCHES NOMINAL IN
overall_length1.750 INCHES NOMINAL IN
circle_diameter0.625 INCHES NOMINAL IN
style_designatorROUND BOTTOM
winding_quantity1
starting_edge_shapeROUND
NSN5315-00-234-7043
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: X404 · 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
•
MATERIAL: NICKEL ALLOY OVERALL
•
KEY SIZE DESIGNATION: WOODRUFF 5
•
KEY HEIGHT: 0.125 INCHES NOMINAL IN
•
THICKNESS: 0.125 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
•
STARTING EDGE SHAPE: ROUND
•
STARTING EDGE RADIUS: 0.016 INCHES NOMINAL IN
•
CIRCLE DIAMETER: 0.625 INCHES NOMINAL IN
•
STYLE DESIGNATOR: ROUND BOTTOM
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALNICKEL ALLOY OVERALL
KEY SIZE DESIGNATIONWOODRUFF 5
KEY HEIGHT0.125 INCHES NOMINAL IN
THICKNESS0.125 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
STARTING EDGE SHAPEROUND
STARTING EDGE RADIUS0.016 INCHES NOMINAL IN
CIRCLE DIAMETER0.625 INCHES NOMINAL IN
STYLE DESIGNATORROUND BOTTOM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
4A-X404Interchangeable
interchangeable cross-reference
interchangeable
X271Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is X404?
X404 is a RELAY,ELECTROMAGNETIC.
What parts can replace X404?
There are 2 known substitutes for X404: 4A-X404, X271. Substitute compatibility should be verified for your specific system.
What is the NSN for X404?
X404 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-234-7043. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026