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Technical Data Sheet
PartsTable / COMPONENT / 39423D
39423D ✓ 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 NUT,PLAIN,SLOTTED,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1115 OVERALL, nut_style: SLOTTED, HEXAGON, nut_height: 1.000 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, hardness_rating: 32.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-424-7429, 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
39423D
NSN: 5310-00-424-7429
FSC: 5310
CAGE: 92679 — NAVISTAR INTL CORP MELROSE PARK ENGINE PLANT LOCATION /MELROSE PARK/ (USA)
SPECIFICATIONS
materialSTEEL COMP 1115 OVERALL
nut_styleSLOTTED, HEXAGON
nut_height1.000 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
hardness_rating32.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
features_providedCASEHARDENED
width_across_flats1.125 INCHES NOMINAL IN
nominal_thread_size0.750 INCHES IN
bearing_surface_typeWASHER FACED
counterbore_diameter0.766 INCHES NOMINAL NUT IN
NSN5310-00-424-7429
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 39423D · 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
•
FEATURES PROVIDED: CASEHARDENED
•
THREAD CLASS: 3B
•
NUT COUNTERBORE DEPTH: 0.250 INCHES NOMINAL NUT IN
•
THREAD SERIES: UNF
•
WIDTH ACROSS FLATS: 1.125 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NUT HEIGHT: 1.000 INCHES NOMINAL IN
•
COUNTERBORE DIAMETER: 0.766 INCHES NOMINAL NUT IN
TECHNICAL CHARACTERISTICS (FLIS)
FEATURES PROVIDEDCASEHARDENED
THREAD CLASS3B
NUT COUNTERBORE DEPTH0.250 INCHES NOMINAL NUT IN
THREAD SERIESUNF
WIDTH ACROSS FLATS1.125 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NUT HEIGHT1.000 INCHES NOMINAL IN
COUNTERBORE DIAMETER0.766 INCHES NOMINAL NUT IN
BEARING SURFACE TYPEWASHER FACED
NUT STYLESLOTTED, HEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
81328502Interchangeable
interchangeable cross-reference
interchangeable
428699Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 39423D?
39423D is a NUT,PLAIN,SLOTTED,HEXAGON.
What parts can replace 39423D?
There are 2 known substitutes for 39423D: 81328502, 428699. Substitute compatibility should be verified for your specific system.
What is the NSN for 39423D?
39423D is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-424-7429. 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