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MS20253-4-550 — PIN,STRAIGHT,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MS20253-4-550: PIN,STRAIGHT,HEADLESS.

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, first_end_style: CHAMFERED, special_features: MATERIAL IS CRES, COMPOSITION FS 302, FS 304, OR FS 316, surface_treatment: PASSIVATE OVERALL, pin_overall_length: 5.500 INCHES NOMINAL IN, pin_overall_diameter: 0.1790 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-555-1099, 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
MS20253-4-550
NSN: 5315-01-555-1099
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL OVERALL
first_end_styleCHAMFERED
special_featuresMATERIAL IS CRES, COMPOSITION FS 302, FS 304, OR FS 316
surface_treatmentPASSIVATE OVERALL
pin_overall_length5.500 INCHES NOMINAL IN
pin_overall_diameter0.1790 INCHES NOMINAL IN
first_end_taper_angle45.0 DEGREES NOMINAL
first_end_taper_length0.015 INCHES NOMINAL IN
supplementary_featuresINTERCHANGEABILITY RELATIONSHIP:MS20253 AND AN253 PARTS OF LIKE DASH NUMBERS ARE UNIVERSALLY, FUNCTIONALLY AND DIMENSIONALLY INTERCHANGABLE
end_item_identificationV-22 AIRCRAFT;STUD,LOCKED IN-RING LOCKED,SERRATED
material_document_and_classificationQQ-W-423 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
second_end_relationship_with_first_endIDENTICAL
NSN5315-01-555-1099
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS20253-4-550 · 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
•
FIRST END TAPER LENGTH: 0.015 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
FIRST END STYLE: CHAMFERED
•
SUPPLEMENTARY FEATURES: INTERCHANGEABILITY RELATIONSHIP:MS20253 AND AN253 PARTS OF LIKE DASH NUMBERS ARE UNIVERSALLY, FUNCTIONALLY AND DIMENSIONALLY INTERCHANGABLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-423 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
FIRST END TAPER ANGLE: 45.0 DEGREES NOMINAL
•
PIN OVERALL DIAMETER: 0.1790 INCHES NOMINAL IN
•
PIN OVERALL LENGTH: 5.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FIRST END TAPER LENGTH0.015 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
FIRST END STYLECHAMFERED
SUPPLEMENTARY FEATURESINTERCHANGEABILITY RELATIONSHIP:MS20253 AND AN253 PARTS OF LIKE DASH NUMBERS ARE UNIVERSALLY, FUNCTIONALLY AND DIMENSIONALLY INTERCHANGABLE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-423 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FIRST END TAPER ANGLE45.0 DEGREES NOMINAL
PIN OVERALL DIAMETER0.1790 INCHES NOMINAL IN
PIN OVERALL LENGTH5.500 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
SPECIAL FEATURESMATERIAL IS CRES, COMPOSITION FS 302, FS 304, OR FS 316
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES 1
SAE-AS20253Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 MS20253-4-550?
MS20253-4-550 is a PIN,STRAIGHT,HEADLESS.
What parts can replace MS20253-4-550?
There is 1 known substitute for MS20253-4-550: SAE-AS20253. Substitute compatibility should be verified for your specific system.
What is the NSN for MS20253-4-550?
MS20253-4-550 is cataloged in the U.S. Government catalog under NSN 5315-01-555-1099. 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.