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Technical Data Sheet
PartsTable / COMPONENT / MS16556-818
MS16556-818 ✓ 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 PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, shear_strength: 1400 DOUBLE POUNDS PER SQUARE INCH, surface_finish: 16.0 MICROINCHES SHANK END, first_end_style: CHAMFERED, hardness_rating: 58.0 ROCKWELL C MINIMUM AND 64.0 ROCKWELL C MAXIMUM OVERALL, second_end_style: RADIUS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-805-7292, 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
MS16556-818
NSN: 5315-00-805-7292
FSC: 5315
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
shear_strength1400 DOUBLE POUNDS PER SQUARE INCH
surface_finish16.0 MICROINCHES SHANK END
first_end_styleCHAMFERED
hardness_rating58.0 ROCKWELL C MINIMUM AND 64.0 ROCKWELL C MAXIMUM OVERALL
second_end_styleRADIUS
special_featuresRADIUS END MAY BE CHAMFERED 25 DEG
features_providedCASEHARDENED
surface_treatmentCADMIUM OVERALL
pin_overall_length0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
pin_overall_diameter0.0946 INCHES MINIMUM AND 0.0948 INCHES MAXIMUM IN
first_end_taper_angle4.0 DEGREES MINIMUM AND 12.0 DEGREES MAXIMUM
NSN5315-00-805-7292
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS16556-818 · 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
•
SECOND END STYLE: RADIUS
•
FIRST END TAPER ANGLE: 4.0 DEGREES MINIMUM AND 12.0 DEGREES MAXIMUM
•
SURFACE FINISH: 16.0 MICROINCHES SHANK END
•
PIN OVERALL LENGTH: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
•
HARDNESS RATING: 58.0 ROCKWELL C MINIMUM AND 64.0 ROCKWELL C MAXIMUM OVERALL
•
SECOND END CORNER RADIUS: 0.0008 INCHES MINIMUM AND 0.0310 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SECOND END STYLERADIUS
FIRST END TAPER ANGLE4.0 DEGREES MINIMUM AND 12.0 DEGREES MAXIMUM
SPECIAL FEATURESRADIUS END MAY BE CHAMFERED 25 DEG
SURFACE FINISH16.0 MICROINCHES SHANK END
PIN OVERALL LENGTH0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
SURFACE FINISH125.0 MICROINCHES BOTH ENDS
HARDNESS RATING58.0 ROCKWELL C MINIMUM AND 64.0 ROCKWELL C MAXIMUM OVERALL
SECOND END CORNER RADIUS0.0008 INCHES MINIMUM AND 0.0310 INCHES MAXIMUM IN
FEATURES PROVIDEDCASEHARDENED
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
103696Interchangeable
interchangeable cross-reference
interchangeable
MIL-P-21143Interchangeable
interchangeable cross-reference
interchangeable
141119Interchangeable
interchangeable cross-reference
interchangeable
8P15-200-253Interchangeable
interchangeable cross-reference
interchangeable
3C3159P03Interchangeable
interchangeable cross-reference
interchangeable
950111-61Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS16556-818?
MS16556-818 is a PIN,STRAIGHT,HEADLESS.
What parts can replace MS16556-818?
There are 17 known substitutes for MS16556-818: 103696, MIL-P-21143, 141119 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS16556-818?
MS16556-818 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-805-7292. 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