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PartsTable / COMPONENT / T45-4
T45-4 ✓ 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 WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: SPRING END,SQUARED AND GROUND BOTH ENDS, coil_quantity: 11, inside_diameter: 1.151 INCHES NOMINAL IN, style_designator: CYLINDRICAL, surface_treatment: ENAMEL OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-193-7577, 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
T45-4
NSN: 5310-00-193-7577
FSC: 5310
CAGE: 79960 — ZENITH FUEL SYSTEMS LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleSPRING END,SQUARED AND GROUND BOTH ENDS
coil_quantity11
inside_diameter1.151 INCHES NOMINAL IN
style_designatorCYLINDRICAL
surface_treatmentENAMEL OVERALL
spring_free_length6.000 INCHES NOMINAL IN
coil_helix_directionRIGHT-HAND
spring_free_outside_diameter1.875 INCHES NOMINAL IN
NSN5310-00-193-7577
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: T45-4 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
1127Interchangeable
interchangeable cross-reference
interchangeable
MX4323PPS4Interchangeable
interchangeable cross-reference
interchangeable
SCC441881Interchangeable
interchangeable cross-reference
interchangeable
11655789-2Interchangeable
interchangeable cross-reference
interchangeable
1727Interchangeable
interchangeable cross-reference
interchangeable
N4559Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is T45-4?
T45-4 is a WASHER,LOCK.
What parts can replace T45-4?
There are 27 known substitutes for T45-4: 1127, MX4323PPS4, SCC441881 and 24 more. Substitute compatibility should be verified for your specific system.
Is T45-4 still available?
T45-4 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