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PartsTable / COMPONENT / MS51859-2
MS51859-2 ✓ 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: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL, thickness: 0.031 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN, hole_diameter: 0.115 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN, overall_diameter: 0.275 INCHES MINIMUM AND 0.297 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-716-5612, 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
MS51859-2
NSN: 5310-00-716-5612
FSC: 5310
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
thickness0.031 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN
hole_diameter0.115 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN
overall_diameter0.275 INCHES MINIMUM AND 0.297 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationMIL-M-20693 TY 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-716-5612
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS51859-2 · 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: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-M-20693 TY 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
HOLE DIAMETER: 0.115 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN
•
OVERALL DIAMETER: 0.275 INCHES MINIMUM AND 0.297 INCHES MAXIMUM IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
PERIPHERAL SHAPE STYLE: ROUND
•
THICKNESS: 0.031 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-M-20693 TY 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.115 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN
OVERALL DIAMETER0.275 INCHES MINIMUM AND 0.297 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
PERIPHERAL SHAPE STYLEROUND
THICKNESS0.031 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
218140Interchangeable
interchangeable cross-reference
interchangeable
74468072003Interchangeable
interchangeable cross-reference
interchangeable
A5-95Interchangeable
interchangeable cross-reference
interchangeable
71910065002Interchangeable
Same NIIN cross-reference
interchangeable
MS51859-02Interchangeable
Same NIIN cross-reference
interchangeable
7915950-01Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51859-2?
MS51859-2 is a WASHER,FLAT.
What parts can replace MS51859-2?
There are 10 known substitutes for MS51859-2: 218140, 74468072003, A5-95 and 7 more. Substitute compatibility should be verified for your specific system.
Is MS51859-2 still available?
MS51859-2 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