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PartsTable / COMPONENT / A63-45-12
A63-45-12 ✓ 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 OVERALL, nut_style: SLOTTED, HEXAGON, nut_height: 0.375 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-176-8115, 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
A63-45-12
NSN: 5310-00-176-8115
FSC: 5310
CAGE: 74080 — HARVARD INDUSTRIES (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSLOTTED, HEXAGON
nut_height0.375 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
countersink_angle110.0 DEGREES NOMINAL NUT
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_across_flats1.109 INCHES MINIMUM AND 1.127 INCHES MAXIMUM IN
nominal_thread_size0.750 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch16
NSN5310-00-176-8115
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A63-45-12 · 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 SERIES: UNF
•
THREAD QUANTITY PER INCH: 16
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
THREAD CLASS: 3B
•
MATERIAL DOCUMENT AND CLASSIFICATION: FF-N836,GRADE C FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NUT HEIGHT: 0.375 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: 4 TYPE AND C GRADE
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESUNF
THREAD QUANTITY PER INCH16
NOMINAL THREAD SIZE0.750 INCHES IN
THREAD CLASS3B
MATERIAL DOCUMENT AND CLASSIFICATIONFF-N836,GRADE C FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NUT HEIGHT0.375 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATA4 TYPE AND C GRADE
MATERIALSTEEL OVERALL
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
COUNTERSINK ANGLE110.0 DEGREES NOMINAL NUT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
ASD1538Interchangeable
interchangeable cross-reference
interchangeable
3490AInterchangeable
interchangeable cross-reference
interchangeable
S637456Interchangeable
interchangeable cross-reference
interchangeable
F1G10PCR33Interchangeable
interchangeable cross-reference
interchangeable
N783Interchangeable
interchangeable cross-reference
interchangeable
F1G10PCR30Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A63-45-12?
A63-45-12 is a NUT,PLAIN,SLOTTED,HEXAGON.
What parts can replace A63-45-12?
There are 23 known substitutes for A63-45-12: ASD1538, 3490A, S637456 and 20 more. Substitute compatibility should be verified for your specific system.
Is A63-45-12 still available?
A63-45-12 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