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A-CF3378-1 — PIN,SHOULDER,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A-CF3378-1: PIN,SHOULDER,HEADLESS.

The PIN,SHOULDER,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1045 OR STEEL COMP 1144 OVERALL, shank_length: 0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN, overall_length: 2.340 INCHES MINIMUM AND 2.400 INCHES MAXIMUM IN, shank_diameter: 1.0550 INCHES MINIMUM AND 1.0565 INCHES MAXIMUM IN, surface_finish: 65.0 MICROINCHES OUTSIDE DIAMETER, first_end_style: SQUARE. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-290-2276, 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
A-CF3378-1
NSN: 5315-01-290-2276
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 74841 — FRUEHAUF CORP FRUEHAUF TRAILER OPNS (USA)
SPECIFICATIONS
materialSTEEL COMP 1045 OR STEEL COMP 1144 OVERALL
shank_length0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
overall_length2.340 INCHES MINIMUM AND 2.400 INCHES MAXIMUM IN
shank_diameter1.0550 INCHES MINIMUM AND 1.0565 INCHES MAXIMUM IN
surface_finish65.0 MICROINCHES OUTSIDE DIAMETER
first_end_styleSQUARE
hardness_rating55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL
style_designatorSHOULDER
shoulder_diameter1.2475 INCHES MINIMUM AND 1.2490 INCHES MAXIMUM IN
surface_treatmentPHOSPHATE ZINC OVERALL
first_end_locationBOTH ENDS
second_shank_length0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
NSN5315-01-290-2276
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A-CF3378-1 · 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: 1.0550 INCHES MINIMUM AND 1.0565 INCHES MAXIMUM IN
•
SECOND SHANK DIAMETER: 1.0550 INCHES MINIMUM AND 1.0565 INCHES MAXIMUM IN
•
SURFACE FINISH: 65.0 MICROINCHES OUTSIDE DIAMETER
•
FIRST END LOCATION: BOTH ENDS
•
FIRST END STYLE: SQUARE
•
HARDNESS RATING: 55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL
•
SHANK LENGTH: 0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SHOULDER
TECHNICAL CHARACTERISTICS
SHANK DIAMETER1.0550 INCHES MINIMUM AND 1.0565 INCHES MAXIMUM IN
SECOND SHANK DIAMETER1.0550 INCHES MINIMUM AND 1.0565 INCHES MAXIMUM IN
SURFACE FINISH65.0 MICROINCHES OUTSIDE DIAMETER
FIRST END LOCATIONBOTH ENDS
FIRST END STYLESQUARE
HARDNESS RATING55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL
SHANK LENGTH0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
STYLE DESIGNATORSHOULDER
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH2.340 INCHES MINIMUM AND 2.400 INCHES MAXIMUM 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 A-CF3378-1?
A-CF3378-1 is a PIN,SHOULDER,HEADLESS.
What is the NSN for A-CF3378-1?
A-CF3378-1 is cataloged in the U.S. Government catalog under NSN 5315-01-290-2276. 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.