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Technical Data Sheet
PartsTable / COMPONENT / MS19070-163
MS19070-163 ✓ 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,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OVERALL, hole_diameter: 3.177 INCHES MINIMUM AND 3.207 INCHES MAXIMUM IN, heat_treatment: ANNEALED, hardness_rating: 70.0 ROCKWELL B MINIMUM AND 90.0 ROCKWELL B MAXIMUM, outside_diameter: 3.844 INCHES MINIMUM AND 3.874 INCHES MAXIMUM IN, style_designator: KEY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-159-6282, 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
MS19070-163
NSN: 5310-00-159-6282
FSC: 5310
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OVERALL
hole_diameter3.177 INCHES MINIMUM AND 3.207 INCHES MAXIMUM IN
heat_treatmentANNEALED
hardness_rating70.0 ROCKWELL B MINIMUM AND 90.0 ROCKWELL B MAXIMUM
outside_diameter3.844 INCHES MINIMUM AND 3.874 INCHES MAXIMUM IN
style_designatorKEY
surface_treatmentPASSIVATE OVERALL
material_thickness0.067 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
external_key_quantity19
external_prebent_key_width0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
internal_prebent_key_width0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM IN
internal_prebent_key_length0.188 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
NSN5310-00-159-6282
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS19070-163 · 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
•
INTERNAL PREBENT KEY WIDTH: 0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
HOLE DIAMETER: 3.177 INCHES MINIMUM AND 3.207 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 4.375 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 19
•
HARDNESS RATING: 70.0 ROCKWELL B MINIMUM AND 90.0 ROCKWELL B MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL PREBENT KEY WIDTH0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
HOLE DIAMETER3.177 INCHES MINIMUM AND 3.207 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS4.375 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY19
HARDNESS RATING70.0 ROCKWELL B MINIMUM AND 90.0 ROCKWELL B MAXIMUM
MATERIAL THICKNESS0.067 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN
OUTSIDE DIAMETER3.844 INCHES MINIMUM AND 3.874 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
5310000085904Interchangeable
interchangeable cross-reference
interchangeable
MILW21338Interchangeable
interchangeable cross-reference
interchangeable
MS19069A15Interchangeable
interchangeable cross-reference
interchangeable
MS19070-093Interchangeable
interchangeable cross-reference
interchangeable
MS19070-103Interchangeable
interchangeable cross-reference
interchangeable
MS19070-123Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS19070-163?
MS19070-163 is a WASHER,KEY.
What parts can replace MS19070-163?
There are 19 known substitutes for MS19070-163: 5310000085904, MILW21338, MS19069A15 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS19070-163?
MS19070-163 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-159-6282. 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