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4T74100 ✓ 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,FLAT is a the manufacturer industrial component. Key specifications include material: LEATHER OVERALL, thickness: 0.062 INCHES NOMINAL IN, hole_diameter: 0.188 INCHES NOMINAL IN, overall_diameter: 0.375 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-530-0631, 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
4T74100
NSN: 5310-00-530-0631
FSC: 5310
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialLEATHER OVERALL
thickness0.062 INCHES NOMINAL IN
hole_diameter0.188 INCHES NOMINAL IN
overall_diameter0.375 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-530-0631
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4T74100 · 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
•
THICKNESS: 0.062 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: LEATHER OVERALL
•
OVERALL DIAMETER: 0.375 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.188 INCHES NOMINAL IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.062 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
MATERIALLEATHER OVERALL
OVERALL DIAMETER0.375 INCHES NOMINAL IN
HOLE DIAMETER0.188 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
524Interchangeable
interchangeable cross-reference
interchangeable
1546148-1Interchangeable
interchangeable cross-reference
interchangeable
MD524Interchangeable
interchangeable cross-reference
interchangeable
H35-0001-202Interchangeable
interchangeable cross-reference
interchangeable
74100ADXInterchangeable
interchangeable cross-reference
interchangeable
10185-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4T74100?
4T74100 is a WASHER,FLAT.
What parts can replace 4T74100?
There are 10 known substitutes for 4T74100: 524, 1546148-1, MD524 and 7 more. Substitute compatibility should be verified for your specific system.
Is 4T74100 still available?
4T74100 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