PartsTable
Technical Data Sheet
98669R1 ✓ 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 COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 OVERALL, nut_style: SLOTTED, HEXAGON, nut_height: 0.600 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNF, hardness_rating: 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-720-7627, 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
98669R1
NSN: 5310-00-720-7627
FSC: 5310
CAGE: 31007 — NAVISTAR INTERNATIONAL CORPORATION DBA NAVISTAR (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 OVERALL
nut_styleSLOTTED, HEXAGON
nut_height0.600 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNF
hardness_rating32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
countersink_angle89.0 DEGREES MINIMUM AND 91.0 DEGREES MAXIMUM NUT
width_across_flats0.8650 INCHES MINIMUM AND 0.8775 INCHES MAXIMUM IN
nominal_thread_size0.562 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch18
NSN5310-00-720-7627
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 98669R1 · 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
MATERIAL: STEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 OVERALL
THREAD QUANTITY PER INCH: 18
THREAD SERIES: UNF
NOMINAL THREAD SIZE: 0.562 INCHES IN
HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM
THREAD DIRECTION: RIGHT-HAND
NUT STYLE: SLOTTED, HEXAGON
COUNTERSINK ANGLE: 89.0 DEGREES MINIMUM AND 91.0 DEGREES MAXIMUM NUT
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 OVERALL
THREAD QUANTITY PER INCH18
THREAD SERIESUNF
NOMINAL THREAD SIZE0.562 INCHES IN
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM
THREAD DIRECTIONRIGHT-HAND
NUT STYLESLOTTED, HEXAGON
COUNTERSINK ANGLE89.0 DEGREES MINIMUM AND 91.0 DEGREES MAXIMUM NUT
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NUT HEIGHT0.600 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
P999Interchangeable
interchangeable cross-reference
interchangeable
P41Interchangeable
interchangeable cross-reference
interchangeable
51954Interchangeable
interchangeable cross-reference
interchangeable
5310007346823Interchangeable
Same NIIN cross-reference
interchangeable
LF516Interchangeable
Same NIIN cross-reference
interchangeable
998669R1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 98669R1?
98669R1 is a NUT,PLAIN,SLOTTED,HEXAGON.
What parts can replace 98669R1?
There are 6 known substitutes for 98669R1: P999, P41, 51954 and 3 more. Substitute compatibility should be verified for your specific system.
Is 98669R1 still available?
98669R1 is currently cancelled.
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