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Technical Data Sheet
PartsTable / COMPONENT / 18-4857
18-4857 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 440F OVERALL, first_end_style: RADIUS, hardness_rating: 55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL, surface_treatment: PASSIVATE OVERALL, pin_overall_length: 0.420 INCHES NOMINAL IN, first_hole_diameter: 0.037 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-579-2550, 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
18-4857
NSN: 5315-00-579-2550
FSC: 5315
CAGE: 66503 — WOODWARD, INC. DIV FUEL SYSTEMS AND CONTROLS (USA)
SPECIFICATIONS
materialSTEEL COMP 440F OVERALL
first_end_styleRADIUS
hardness_rating55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL
surface_treatmentPASSIVATE OVERALL
pin_overall_length0.420 INCHES NOMINAL IN
first_hole_diameter0.037 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
pin_overall_diameter0.1244 INCHES MINIMUM AND 0.1247 INCHES MAXIMUM IN
hole_arrangement_styleONE END DRILLED
first_end_corner_radius0.020 INCHES NOMINAL IN
material_document_and_classificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
second_end_relationship_with_first_endIDENTICAL
distance_from_centerline_of_hole_to_end_of_pin0.070 INCHES NOMINAL IN
NSN5315-00-579-2550
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 18-4857 · 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 TREATMENT: PASSIVATE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
PIN OVERALL DIAMETER: 0.1244 INCHES MINIMUM AND 0.1247 INCHES MAXIMUM IN
•
HOLE ARRANGEMENT STYLE: ONE END DRILLED
•
FIRST END CORNER RADIUS: 0.020 INCHES NOMINAL IN
•
PIN OVERALL LENGTH: 0.420 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
MATERIAL: STEEL COMP 440F OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTPASSIVATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
PIN OVERALL DIAMETER0.1244 INCHES MINIMUM AND 0.1247 INCHES MAXIMUM IN
HOLE ARRANGEMENT STYLEONE END DRILLED
FIRST END CORNER RADIUS0.020 INCHES NOMINAL IN
PIN OVERALL LENGTH0.420 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
MATERIALSTEEL COMP 440F OVERALL
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN0.070 INCHES NOMINAL IN
FIRST END STYLERADIUS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
1000488Interchangeable
interchangeable cross-reference
interchangeable
18-4857Interchangeable
interchangeable cross-reference
interchangeable
18-4857-82XInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 18-4857?
18-4857 is a PIN,STRAIGHT,HEADLESS.
What parts can replace 18-4857?
There are 3 known substitutes for 18-4857: 1000488, 18-4857, 18-4857-82X. Substitute compatibility should be verified for your specific system.
What is the NSN for 18-4857?
18-4857 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-579-2550. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026