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Technical Data Sheet
PartsTable / COMPONENT / 3/4-10UNC2
3/4-10UNC2 ✓ 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 3/4-10UNC2 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-272-5702, 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
3/4-10UNC2
NSN: 5310-00-272-5702
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part Number3/4-10UNC2
NSN5310-00-272-5702
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3/4-10UNC2 · 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 CLASS: 2B
•
THREAD QUANTITY PER INCH: 10
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
THREAD DIRECTION: RIGHT-HAND
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: NICKEL ALLOY 400 AND NICKEL ALLOY R-405 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2B
THREAD QUANTITY PER INCH10
NOMINAL THREAD SIZE0.750 INCHES IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
THREAD DIRECTIONRIGHT-HAND
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALNICKEL ALLOY 400 AND NICKEL ALLOY R-405 OVERALL
NUT HEIGHT0.617 INCHES MINIMUM AND 0.665 INCHES MAXIMUM IN
NUT STYLEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
6643057-8Interchangeable
interchangeable cross-reference
interchangeable
959E478-009Interchangeable
interchangeable cross-reference
interchangeable
248L439PC227Interchangeable
interchangeable cross-reference
interchangeable
0.75010UNC2BT1G400SNSA/BAAInterchangeable
interchangeable cross-reference
interchangeable
RC-F300,RC-F335/245-4363352Interchangeable
interchangeable cross-reference
interchangeable
MILS1222G,3/4IN10UNC2BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3/4-10UNC2?
3/4-10UNC2 is a 3/4-10UNC2.
What parts can replace 3/4-10UNC2?
There are 15 known substitutes for 3/4-10UNC2: 6643057-8, 959E478-009, 248L439PC227 and 12 more. Substitute compatibility should be verified for your specific system.
Is 3/4-10UNC2 still available?
3/4-10UNC2 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