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PartsTable / COMPONENT / MS35339-61
MS35339-61 ✓ 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, hole_diameter: 0.168 INCHES MINIMUM AND 0.178 INCHES MAXIMUM IN, hardness_rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM, outside_diameter: 0.310 INCHES NOMINAL IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: PHOSPHATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-209-3871, 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
MS35339-61
NSN: 5310-00-209-3871
FSC: 5310
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.168 INCHES MINIMUM AND 0.178 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
outside_diameter0.310 INCHES NOMINAL IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentPHOSPHATE OVERALL
material_thickness0.047 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
material_document_and_classificationFED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 MIL STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-P-16232,TYPE Z MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-209-3871
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS35339-61 · 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
•
HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
•
OUTSIDE DIAMETER: 0.310 INCHES NOMINAL IN
•
SURFACE TREATMENT: PHOSPHATE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 MIL STD SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL OVERALL
•
MATERIAL THICKNESS: 0.047 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.168 INCHES MINIMUM AND 0.178 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-P-16232,TYPE Z MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
OUTSIDE DIAMETER0.310 INCHES NOMINAL IN
SURFACE TREATMENTPHOSPHATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 MIL STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
MATERIAL THICKNESS0.047 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
HOLE DIAMETER0.168 INCHES MINIMUM AND 0.178 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-P-16232,TYPE Z MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
8T1204B3Interchangeable
interchangeable cross-reference
interchangeable
11688-1Interchangeable
interchangeable cross-reference
interchangeable
4C21RInterchangeable
interchangeable cross-reference
interchangeable
7530LInterchangeable
interchangeable cross-reference
interchangeable
10430Interchangeable
interchangeable cross-reference
interchangeable
2400MFInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS35339-61?
MS35339-61 is a WASHER,LOCK.
What parts can replace MS35339-61?
There are 11 known substitutes for MS35339-61: 8T1204B3, 11688-1, 4C21R and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS35339-61?
MS35339-61 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-209-3871. 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