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Technical Data Sheet
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31-6104-2 — PIN,STRAIGHT,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

31-6104-2: PIN,STRAIGHT,HEADLESS.

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include end_item_identification: AIRCRAFT,HORNET F/A-18. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-190-1568, 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
31-6104-2
NSN: 5315-01-190-1568
NIINs: 011901568, 013138293
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 66503 — WOODWARD, INC. DIV FUEL SYSTEMS AND CONTROLS (USA)
SPECIFICATIONS
end_item_identificationAIRCRAFT,HORNET F/A-18
NSN5315-01-190-1568
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 31-6104-2 · 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
•
SURFACE FINISH: 4.0 MICROINCHES OUTSIDE DIAMETER
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: SP-151 MFR REF SINGLE TREATMENT RESPONSE OVERALL
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SECOND END TAPER ANGLE: 45.0 DEGREES NOMINAL
•
HOLE ARRANGEMENT STYLE: ONE END DRILLED
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FIRST END STYLE: SQUARE
•
FIRST HOLE DIAMETER: 0.040 INCHES NOMINAL IN
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HARDNESS RATING: 55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL
•
SECOND END TAPER LENGTH: 0.020 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH4.0 MICROINCHES OUTSIDE DIAMETER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONSP-151 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SECOND END TAPER ANGLE45.0 DEGREES NOMINAL
HOLE ARRANGEMENT STYLEONE END DRILLED
FIRST END STYLESQUARE
FIRST HOLE DIAMETER0.040 INCHES NOMINAL IN
HARDNESS RATING55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL
SECOND END TAPER LENGTH0.020 INCHES NOMINAL IN
PIN OVERALL DIAMETER0.1550 INCHES MINIMUM AND 0.1555 INCHES MAXIMUM IN
PIN OVERALL LENGTH0.880 INCHES NOMINAL IN
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 31-6104-2?
31-6104-2 is a PIN,STRAIGHT,HEADLESS.
What is the NSN for 31-6104-2?
31-6104-2 is cataloged in the U.S. Government catalog under NSN 5315-01-190-1568. 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.