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Technical Data Sheet
A33280 ✓ 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,HEXAGON is a the manufacturer industrial component. Key specifications include nut_style: HEXAGON, nut_height: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNEF, thread_direction: RIGHT-HAND, countersink_angle: 15.0 DEGREES NOMINAL NUT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-044-0752, 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
A33280
NSN: 5310-01-044-0752
FSC: 5310
CAGE: 03990 — INGERSOLL-RAND COMPANY DBA INGERSOLL-RAND (USA)
SPECIFICATIONS
nut_styleHEXAGON
nut_height0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNEF
thread_directionRIGHT-HAND
countersink_angle15.0 DEGREES NOMINAL NUT
surface_treatmentOXIDE OVERALL
nominal_thread_size0.750 INCHES IN
counterbore_diameter0.755 INCHES MINIMUM AND 0.765 INCHES MAXIMUM NUT IN
nut_counterbore_depth0.060 INCHES MINIMUM AND 0.064 INCHES MAXIMUM OVERALL IN
thread_quantity_per_inch20
NSN5310-01-044-0752
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A33280 · 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
COUNTERBORE DIAMETER: 0.755 INCHES MINIMUM AND 0.765 INCHES MAXIMUM NUT IN
NUT COUNTERBORE DEPTH: 0.060 INCHES MINIMUM AND 0.064 INCHES MAXIMUM OVERALL IN
THREAD QUANTITY PER INCH: 20
NUT HEIGHT: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
THREAD SERIES: UNEF
NUT STYLE: HEXAGON
SURFACE TREATMENT: OXIDE OVERALL
NOMINAL THREAD SIZE: 0.750 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
COUNTERBORE DIAMETER0.755 INCHES MINIMUM AND 0.765 INCHES MAXIMUM NUT IN
NUT COUNTERBORE DEPTH0.060 INCHES MINIMUM AND 0.064 INCHES MAXIMUM OVERALL IN
THREAD QUANTITY PER INCH20
NUT HEIGHT0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
THREAD SERIESUNEF
NUT STYLEHEXAGON
SURFACE TREATMENTOXIDE OVERALL
NOMINAL THREAD SIZE0.750 INCHES IN
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
33-280Interchangeable
interchangeable cross-reference
interchangeable
125005Interchangeable
interchangeable cross-reference
interchangeable
01Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A33280?
A33280 is a NUT,PLAIN,HEXAGON.
What parts can replace A33280?
There are 3 known substitutes for A33280: 33-280, 125005, 01. Substitute compatibility should be verified for your specific system.
What is the NSN for A33280?
A33280 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-044-0752. This indicates validated use in U.S. government and defense supply chains.
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