PartsTable
Technical Data Sheet
JT10618 ✓ 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 material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.617 INCHES MINIMUM AND 0.665 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, hardness_rating: 68.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-010-3031, 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
JT10618
NSN: 5310-00-010-3031
FSC: 5310
CAGE: 81240 — WHITE FARM EQUIPMENT CO SUB OF TIC INVESTMENT INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.617 INCHES MINIMUM AND 0.665 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
hardness_rating68.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
width_across_flats1.088 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
nominal_thread_size0.750 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch16
nondefinitive_spec/std_data2 TYPE AND 4 STYLE AND A GRADE
NSN5310-00-010-3031
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: JT10618 · 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
NUT HEIGHT: 0.617 INCHES MINIMUM AND 0.665 INCHES MAXIMUM IN
NUT STYLE: HEXAGON
THREAD SERIES: UNF
THREAD QUANTITY PER INCH: 16
HARDNESS RATING: 68.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
NOMINAL THREAD SIZE: 0.750 INCHES IN
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 4 STYLE AND A GRADE
TECHNICAL CHARACTERISTICS (FLIS)
NUT HEIGHT0.617 INCHES MINIMUM AND 0.665 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD SERIESUNF
THREAD QUANTITY PER INCH16
HARDNESS RATING68.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
NOMINAL THREAD SIZE0.750 INCHES IN
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 4 STYLE AND A GRADE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
WIDTH ACROSS FLATS1.088 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
10303-2Interchangeable
interchangeable cross-reference
interchangeable
10303Interchangeable
interchangeable cross-reference
interchangeable
10303-1Interchangeable
interchangeable cross-reference
interchangeable
513910-1Interchangeable
interchangeable cross-reference
interchangeable
105X40R100Interchangeable
interchangeable cross-reference
interchangeable
1219D183BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is JT10618?
JT10618 is a NUT,PLAIN,HEXAGON.
What parts can replace JT10618?
There are 15 known substitutes for JT10618: 10303-2, 10303, 10303-1 and 12 more. Substitute compatibility should be verified for your specific system.
Is JT10618 still available?
JT10618 is currently cancelled.
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