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1D278 — PIN,STRAIGHT,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1D278: PIN,STRAIGHT,HEADLESS.

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, first_end_style: SQUARE, pin_overall_length: 4.750 INCHES NOMINAL IN, first_hole_diameter: 0.344 INCHES NOMINAL IN, pin_overall_diameter: 1.0000 INCHES NOMINAL IN, hole_arrangement_style: ONE END DRILLED. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-177-9873, 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
1D278
NSN: 5315-01-177-9873
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 2Y614 — LINK-BELT CRANES, L.P., LLLP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
first_end_styleSQUARE
pin_overall_length4.750 INCHES NOMINAL IN
first_hole_diameter0.344 INCHES NOMINAL IN
pin_overall_diameter1.0000 INCHES NOMINAL IN
hole_arrangement_styleONE END DRILLED
second_end_relationship_with_first_endIDENTICAL
distance_from_centerline_of_hole_to_end_of_pin0.312 INCHES NOMINAL IN
NSN5315-01-177-9873
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1D278 · 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
•
HOLE ARRANGEMENT STYLE: ONE END DRILLED
•
FIRST END STYLE: SQUARE
•
FIRST HOLE DIAMETER: 0.344 INCHES NOMINAL IN
•
PIN OVERALL DIAMETER: 1.0000 INCHES NOMINAL IN
•
PIN OVERALL LENGTH: 4.750 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
MATERIAL: STEEL OVERALL
•
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN: 0.312 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HOLE ARRANGEMENT STYLEONE END DRILLED
FIRST END STYLESQUARE
FIRST HOLE DIAMETER0.344 INCHES NOMINAL IN
PIN OVERALL DIAMETER1.0000 INCHES NOMINAL IN
PIN OVERALL LENGTH4.750 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
MATERIALSTEEL OVERALL
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN0.312 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: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1D278?
1D278 is a PIN,STRAIGHT,HEADLESS.
What is the NSN for 1D278?
1D278 is cataloged in the U.S. Government catalog under NSN 5315-01-177-9873. 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.