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MS16555-51 — PIN,STRAIGHT,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MS16555-51: PIN,STRAIGHT,HEADLESS.

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, shear_strength: 12800 DOUBLE POUND, surface_finish: 16.0 MICROINCHES OUTSIDE DIAMETER, first_end_style: CHAMFERED, hardness_rating: 47.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM OVERALL, second_end_style: RADIUS. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-947-6977, 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
MS16555-51
NSN: 5315-00-947-6977
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
shear_strength12800 DOUBLE POUND
surface_finish16.0 MICROINCHES OUTSIDE DIAMETER
first_end_styleCHAMFERED
hardness_rating47.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM OVERALL
second_end_styleRADIUS
special_featuresGRADIUS END MAY BE CHAMFERED 25.0 DEGREES
features_providedCASEHARDENED
pin_overall_length1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
pin_overall_diameter0.2501 INCHES MINIMUM AND 0.2503 INCHES MAXIMUM IN
first_end_taper_angle4.0 DEGREES MINIMUM AND 16.0 DEGREES MAXIMUM
first_end_taper_length0.380 INCHES NOMINAL IN
NSN5315-00-947-6977
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS16555-51 · 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
•
SURFACE FINISH: 16.0 MICROINCHES OUTSIDE DIAMETER
•
FIRST END TAPER LENGTH: 0.380 INCHES NOMINAL IN
•
FIRST END STYLE: CHAMFERED
•
HARDNESS RATING: 47.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A29 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
FIRST END TAPER ANGLE: 4.0 DEGREES MINIMUM AND 16.0 DEGREES MAXIMUM
•
PIN OVERALL DIAMETER: 0.2501 INCHES MINIMUM AND 0.2503 INCHES MAXIMUM IN
•
PIN OVERALL LENGTH: 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH16.0 MICROINCHES OUTSIDE DIAMETER
FIRST END TAPER LENGTH0.380 INCHES NOMINAL IN
FIRST END STYLECHAMFERED
HARDNESS RATING47.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A29 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FIRST END TAPER ANGLE4.0 DEGREES MINIMUM AND 16.0 DEGREES MAXIMUM
PIN OVERALL DIAMETER0.2501 INCHES MINIMUM AND 0.2503 INCHES MAXIMUM IN
PIN OVERALL LENGTH1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
SECOND END RELATIONSHIP WITH FIRST ENDNOT IDENTICAL
FEATURES PROVIDEDCASEHARDENED
SUBSTITUTES & CROSS-REFERENCES 2
10493816Reference document
Same NSN cross-reference
Reference document — Informative reference only
122-4735538 P/N 66Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS16555-51?
MS16555-51 is a PIN,STRAIGHT,HEADLESS.
What parts can replace MS16555-51?
There are 2 known substitutes for MS16555-51: 10493816, 122-4735538 P/N 66. Substitute compatibility should be verified for your specific system.
What is the NSN for MS16555-51?
MS16555-51 is cataloged in the U.S. Government catalog under NSN 5315-00-947-6977. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.