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Technical Data Sheet
PartsTable / COMPONENT / X258
X258 ✓ 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 OVERALL, thickness: 0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN, head_style: FILLISTER, key_height: 0.198 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN, head_height: 0.156 INCHES NOMINAL IN, thread_class: 2A A. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-010-6749, 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
X258
NSN: 5315-00-010-6749
FSC: 5315
CAGE: 68505 — PRESTOLITE ELECTRIC INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
head_styleFILLISTER
key_height0.198 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
head_height0.156 INCHES NOMINAL IN
thread_class2A A
head_diameter0.250 INCHES NOMINAL IN
thread_length0.625 INCHES MAXIMUM IN
circle_diameter0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
fastener_length0.625 INCHES NOMINAL IN
hardness_rating10.0 ROCKWELL C NOMINAL OVERALL
washer_quantity1
NSN5315-00-010-6749
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: X258 · 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: 0.198 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
•
THICKNESS: 0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
•
KEY SIZE DESIGNATION: WOODRUFF 3
•
STARTING EDGE RADIUS: 0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
•
HARDNESS RATING: 10.0 ROCKWELL C NOMINAL OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
STARTING EDGE SHAPE: ROUND
•
MATERIAL: STEEL COMP 1035 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
KEY HEIGHT0.198 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
THICKNESS0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM IN
KEY SIZE DESIGNATIONWOODRUFF 3
STARTING EDGE RADIUS0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
HARDNESS RATING10.0 ROCKWELL C NOMINAL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
STARTING EDGE SHAPEROUND
MATERIALSTEEL COMP 1035 OVERALL
STYLE DESIGNATORROUND BOTTOM
CIRCLE DIAMETER0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 33
106749Interchangeable
interchangeable cross-reference
interchangeable
X158Interchangeable
interchangeable cross-reference
interchangeable
7541002Interchangeable
interchangeable cross-reference
interchangeable
13516Interchangeable
interchangeable cross-reference
interchangeable
B5-59-402Interchangeable
interchangeable cross-reference
interchangeable
401069-002Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is X258?
X258 is a KEY,WOODRUFF.
What parts can replace X258?
There are 33 known substitutes for X258: 106749, X158, 7541002 and 30 more. Substitute compatibility should be verified for your specific system.
Is X258 still available?
X258 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