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Technical Data Sheet
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12338146 ✓ 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 BRACKET,VEHICULAR COMPONENTS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1050 OVERALL, nut_style: FLOATINGFLOATING, thread_class: 2B2B, overall_width: 0.690 INCHES NOMINAL0.690 INCHES NOMINAL IN, thread_series: UNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC), hardness_rating: 40.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM50.0 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 5310-01-160-9529, 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
12338146
NSN: 5310-01-160-9529
FSC: 5310
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 1050 OVERALL
nut_styleFLOATINGFLOATING
thread_class2B2B
overall_width0.690 INCHES NOMINAL0.690 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC)
hardness_rating40.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM50.0 ROCKWELL C MAXIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGNPREVAILING TORQUE ALL METAL DESIGN
panel_thickness0.070 INCHES MINIMUM AND 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM0.080 INCHES MAXIMUM IN
thread_directionRIGHT-HANDRIGHT-HAND
nominal_thread_size0.312 INCHES0.312 INCHES IN
thread_quantity_per_inch1818
distance_from_base_to_center_of_aperture0.540 INCHES NOMINAL0.540 INCHES NOMINAL IN
NSN5310-01-160-9529
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12338146 · 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
•
THREAD DIRECTION: RIGHT-HANDRIGHT-HAND
•
DISTANCE FROM BASE TO CENTER OF APERTURE: 0.540 INCHES NOMINAL0.540 INCHES NOMINAL IN
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM50.0 ROCKWELL C MAXIMUM
•
THREAD CLASS: 2B2B
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGNPREVAILING TORQUE ALL METAL DESIGN
•
MATERIAL: STEEL COMP 1050 OVERALL
•
PANEL THICKNESS: 0.070 INCHES MINIMUM AND 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM0.080 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: 1818
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HANDRIGHT-HAND
DISTANCE FROM BASE TO CENTER OF APERTURE0.540 INCHES NOMINAL0.540 INCHES NOMINAL IN
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM50.0 ROCKWELL C MAXIMUM
THREAD CLASS2B2B
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGNPREVAILING TORQUE ALL METAL DESIGN
MATERIALSTEEL COMP 1050 OVERALL
PANEL THICKNESS0.070 INCHES MINIMUM AND 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM0.080 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH1818
NUT STYLEFLOATINGFLOATING
NOMINAL THREAD SIZE0.312 INCHES0.312 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
M45952-1-4-15Interchangeable
interchangeable cross-reference
interchangeable
MILP45952Interchangeable
interchangeable cross-reference
interchangeable
BLDS4-15Interchangeable
interchangeable cross-reference
interchangeable
12338146Interchangeable
interchangeable cross-reference
interchangeable
5579502Interchangeable
interchangeable cross-reference
interchangeable
444618Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12338146?
12338146 is a BRACKET,VEHICULAR COMPONENTS.
What parts can replace 12338146?
There are 12 known substitutes for 12338146: M45952-1-4-15, MILP45952, BLDS4-15 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12338146?
12338146 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-160-9529. 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