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93890A638 — PIN,GROOVED,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

93890A638: PIN,GROOVED,HEADLESS.

The PIN,GROOVED,HEADLESS is a the manufacturer industrial component. Key specifications include diameter: 0.500 INCHES NOMINAL IN, material: STEEL COMP 1018 OVERALL, overall_length: 3.250 INCHES MINIMUM AND 3.270 INCHES MAXIMUM IN, undercut_width: 0.046 INCHES NOMINAL IN, first_end_style: CHAMFERED, hardness_rating: 80.0 ROCKWELL B NOMINAL OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-644-3303, 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
93890A638
NSN: 5315-01-644-3303
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
diameter0.500 INCHES NOMINAL IN
materialSTEEL COMP 1018 OVERALL
overall_length3.250 INCHES MINIMUM AND 3.270 INCHES MAXIMUM IN
undercut_width0.046 INCHES NOMINAL IN
first_end_styleCHAMFERED
hardness_rating80.0 ROCKWELL B NOMINAL OVERALL
effective_length2.750 INCHES MINIMUM AND 2.770 INCHES MAXIMUM IN
second_end_styleCHAMFERED
style_designatorGROOVE
surface_treatmentZINC OVERALL
pin_attachment_typeRING
second_undercut_width0.046 INCHES NOMINAL IN
NSN5315-01-644-3303
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 93890A638 · 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
•
UNDERCUT WIDTH: 0.046 INCHES NOMINAL IN
•
FIRST END STYLE: CHAMFERED
•
HARDNESS RATING: 80.0 ROCKWELL B NOMINAL OVERALL
•
PIN ATTACHMENT TYPE: RING
•
STYLE DESIGNATOR: GROOVE
•
DIAMETER: 0.500 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
TECHNICAL CHARACTERISTICS
UNDERCUT WIDTH0.046 INCHES NOMINAL IN
FIRST END STYLECHAMFERED
HARDNESS RATING80.0 ROCKWELL B NOMINAL OVERALL
PIN ATTACHMENT TYPERING
STYLE DESIGNATORGROOVE
DIAMETER0.500 INCHES NOMINAL IN
OVERALL LENGTH3.250 INCHES MINIMUM AND 3.270 INCHES MAXIMUM IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
EFFECTIVE LENGTH2.750 INCHES MINIMUM AND 2.770 INCHES MAXIMUM IN
SECOND UNDERCUT WIDTH0.046 INCHES NOMINAL IN
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 93890A638?
93890A638 is a PIN,GROOVED,HEADLESS.
What is the NSN for 93890A638?
93890A638 is cataloged in the U.S. Government catalog under NSN 5315-01-644-3303. 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.