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SE251 — PIN,SHOULDER,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

SE251: PIN,SHOULDER,HEADLESS.

The PIN,SHOULDER,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, shank_length: 0.500 INCHES NOMINAL IN, overall_length: 0.625 INCHES NOMINAL IN, shank_diameter: 0.122 INCHES NOMINAL IN, undercut_width: 0.018 INCHES NOMINAL IN, first_end_style: POINTED. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-077-0771, 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
SE251
NSN: 5315-00-077-0771
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 78388 — WOODWARD CONTROLS INC. (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
shank_length0.500 INCHES NOMINAL IN
overall_length0.625 INCHES NOMINAL IN
shank_diameter0.122 INCHES NOMINAL IN
undercut_width0.018 INCHES NOMINAL IN
first_end_stylePOINTED
second_end_styleSQUARE
style_designatorUNDERCUT
shoulder_diameter0.185 INCHES NOMINAL IN
undercut_diameter0.109 INCHES NOMINAL IN
first_end_locationCHAMFERED END
second_shank_length0.046 INCHES NOMINAL IN
NSN5315-00-077-0771
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SE251 · 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
•
SHANK DIAMETER: 0.122 INCHES NOMINAL IN
•
SECOND SHANK DIAMETER: 0.109 INCHES NOMINAL IN
•
UNDERCUT WIDTH: 0.018 INCHES NOMINAL IN
•
FIRST END TAPER LENGTH: 0.093 INCHES NOMINAL IN
•
UNDERCUT DIAMETER: 0.109 INCHES NOMINAL IN
•
FIRST END LOCATION: CHAMFERED END
•
FIRST END STYLE: POINTED
•
SHANK LENGTH: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.122 INCHES NOMINAL IN
SECOND SHANK DIAMETER0.109 INCHES NOMINAL IN
UNDERCUT WIDTH0.018 INCHES NOMINAL IN
FIRST END TAPER LENGTH0.093 INCHES NOMINAL IN
UNDERCUT DIAMETER0.109 INCHES NOMINAL IN
FIRST END LOCATIONCHAMFERED END
FIRST END STYLEPOINTED
SHANK LENGTH0.500 INCHES NOMINAL IN
STYLE DESIGNATORUNDERCUT
OVERALL LENGTH0.625 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 SE251?
SE251 is a PIN,SHOULDER,HEADLESS.
What is the NSN for SE251?
SE251 is cataloged in the U.S. Government catalog under NSN 5315-00-077-0771. 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.