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Technical Data Sheet
PartsTable / COMPONENT / 5X139
5X139 ✓ 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: WOOL COMP 16R3 OVERALL, thickness: 0.438 INCHES NOMINAL IN, hole_diameter: 3.562 INCHES NOMINAL IN, overall_diameter: 4.844 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 5310-00-233-5877, 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
5X139
NSN: 5310-00-233-5877
FSC: 5310
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)
SPECIFICATIONS
materialWOOL COMP 16R3 OVERALL
thickness0.438 INCHES NOMINAL IN
hole_diameter3.562 INCHES NOMINAL IN
overall_diameter4.844 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
minimum_tensile_strength400 POUNDS PER SQUARE INCH LBS
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationC-F-206,TYPE 1,CL 16R3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-233-5877
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5X139 · 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
•
CENTER HOLE SHAPE STYLE: ROUND
•
MINIMUM TENSILE STRENGTH: 400 POUNDS PER SQUARE INCH LBS
•
MATERIAL DOCUMENT AND CLASSIFICATION: C-F-206,TYPE 1,CL 16R3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: WOOL COMP 16R3 OVERALL
•
OVERALL DIAMETER: 4.844 INCHES NOMINAL IN
•
THICKNESS: 0.438 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE SHAPE STYLEROUND
MINIMUM TENSILE STRENGTH400 POUNDS PER SQUARE INCH LBS
MATERIAL DOCUMENT AND CLASSIFICATIONC-F-206,TYPE 1,CL 16R3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALWOOL COMP 16R3 OVERALL
OVERALL DIAMETER4.844 INCHES NOMINAL IN
THICKNESS0.438 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER3.562 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
145181Interchangeable
interchangeable cross-reference
interchangeable
43800Interchangeable
interchangeable cross-reference
interchangeable
P2945Interchangeable
interchangeable cross-reference
interchangeable
13222E0632Interchangeable
interchangeable cross-reference
interchangeable
845946 PIECE 31Interchangeable
interchangeable cross-reference
interchangeable
B43800Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5X139?
5X139 is a WASHER,FLAT.
What parts can replace 5X139?
There are 8 known substitutes for 5X139: 145181, 43800, P2945 and 5 more. Substitute compatibility should be verified for your specific system.
Is 5X139 still available?
5X139 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