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731228PC4 — PIN,GROOVED,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

731228PC4: PIN,GROOVED,HEADLESS.

The PIN,GROOVED,HEADLESS is a the manufacturer industrial component. Key specifications include diameter: 0.4370 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM IN, material: STEEL COMP 8640 OVERALL, overall_length: 1.562 INCHES NOMINAL IN, undercut_width: 0.028 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN, first_end_style: SQUARE, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-210-0827, 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
731228PC4
NSN: 5315-00-210-0827
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
diameter0.4370 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM IN
materialSTEEL COMP 8640 OVERALL
overall_length1.562 INCHES NOMINAL IN
undercut_width0.028 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
first_end_styleSQUARE
hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
effective_length1.375 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN
style_designatorGROOVE
surface_treatmentPHOSPHATE OVERALL
undercut_diameter0.410 INCHES MINIMUM AND 0.414 INCHES MAXIMUM IN
first_end_locationBOTH ENDS
second_undercut_width0.028 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
NSN5315-00-210-0827
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 731228PC4 · 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: 0.028 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
•
UNDERCUT DIAMETER: 0.410 INCHES MINIMUM AND 0.414 INCHES MAXIMUM IN
•
FIRST END LOCATION: BOTH ENDS
•
FIRST END STYLE: SQUARE
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
•
STYLE DESIGNATOR: GROOVE
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
DIAMETER: 0.4370 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
UNDERCUT WIDTH0.028 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
UNDERCUT DIAMETER0.410 INCHES MINIMUM AND 0.414 INCHES MAXIMUM IN
FIRST END LOCATIONBOTH ENDS
FIRST END STYLESQUARE
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
STYLE DESIGNATORGROOVE
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
DIAMETER0.4370 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM IN
OVERALL LENGTH1.562 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
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: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 731228PC4?
731228PC4 is a PIN,GROOVED,HEADLESS.
What is the NSN for 731228PC4?
731228PC4 is cataloged in the U.S. Government catalog under NSN 5315-00-210-0827. 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.