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3T9 ✓ 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: 0.625 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-199-6484, 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
3T9
NSN: 5310-00-199-6484
FSC: 5310
CAGE: 04285 — ATHEY PRODUCTS CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSLOTTED, HEXAGON
nut_height0.625 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats1.812 INCHES NOMINAL IN
nominal_thread_size1.250 INCHES IN
bearing_surface_typeFLAT OR WASHER FACED
thread_quantity_per_inch12
NSN5310-00-199-6484
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3T9 · 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
•
NUT STYLE: SLOTTED, HEXAGON
•
NOMINAL THREAD SIZE: 1.250 INCHES IN
•
THREAD QUANTITY PER INCH: 12
•
BEARING SURFACE TYPE: FLAT OR WASHER FACED
•
MATERIAL: STEEL OVERALL
•
WIDTH ACROSS FLATS: 1.812 INCHES NOMINAL IN
•
NUT HEIGHT: 0.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESUNF
NUT STYLESLOTTED, HEXAGON
NOMINAL THREAD SIZE1.250 INCHES IN
THREAD QUANTITY PER INCH12
BEARING SURFACE TYPEFLAT OR WASHER FACED
MATERIALSTEEL OVERALL
WIDTH ACROSS FLATS1.812 INCHES NOMINAL IN
NUT HEIGHT0.625 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
G374921PC57Interchangeable
interchangeable cross-reference
interchangeable
D8425PC33Interchangeable
interchangeable cross-reference
interchangeable
D7974PC36Interchangeable
interchangeable cross-reference
interchangeable
290-72Interchangeable
interchangeable cross-reference
interchangeable
M148Interchangeable
interchangeable cross-reference
interchangeable
M148-7254Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3T9?
3T9 is a NUT,PLAIN,SLOTTED,HEXAGON.
What parts can replace 3T9?
There are 8 known substitutes for 3T9: G374921PC57, D8425PC33, D7974PC36 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3T9?
3T9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-199-6484. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026