PartsTable
Technical Data Sheet
502581 ✓ 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,GROOVED,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP B1112 OR STEEL COMP B1113 OVERALL, overall_length: 0.500 INCHES NOMINAL IN, first_end_style: OVAL, hardness_rating: 88.0 ROCKWELL B NOMINAL OVERALL, style_designator: FULL LENGTH GROOVE, surface_treatment: ZINC OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-010-7317, 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
502581
NSN: 5315-00-010-7317
FSC: 5315
CAGE: 02978 — RENK AMERICA LLC DIV RENK AMERICA (USA)
SPECIFICATIONS
materialSTEEL COMP B1112 OR STEEL COMP B1113 OVERALL
overall_length0.500 INCHES NOMINAL IN
first_end_styleOVAL
hardness_rating88.0 ROCKWELL B NOMINAL OVERALL
style_designatorFULL LENGTH GROOVE
surface_treatmentZINC OVERALL
first_end_locationBOTH ENDS
pin_large_end_diameter0.196 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
pin_small_end_diameter0.185 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL
second_end_relationship_with_first_endIDENTICAL
NSN5315-00-010-7317
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 502581 · 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
STYLE DESIGNATOR: FULL LENGTH GROOVE
HARDNESS RATING: 88.0 ROCKWELL B NOMINAL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL
MATERIAL: STEEL COMP B1112 OR STEEL COMP B1113 OVERALL
SURFACE TREATMENT: ZINC OVERALL
PIN SMALL END DIAMETER: 0.185 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
PIN LARGE END DIAMETER: 0.196 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORFULL LENGTH GROOVE
HARDNESS RATING88.0 ROCKWELL B NOMINAL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL
MATERIALSTEEL COMP B1112 OR STEEL COMP B1113 OVERALL
SURFACE TREATMENTZINC OVERALL
OVERALL LENGTH0.500 INCHES NOMINAL IN
PIN SMALL END DIAMETER0.185 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
PIN LARGE END DIAMETER0.196 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
FIRST END LOCATIONBOTH ENDS
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
H5582Interchangeable
interchangeable cross-reference
interchangeable
48-15021Interchangeable
interchangeable cross-reference
interchangeable
EW7197Interchangeable
interchangeable cross-reference
interchangeable
155356Interchangeable
interchangeable cross-reference
interchangeable
1901TInterchangeable
interchangeable cross-reference
interchangeable
130132Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 502581?
502581 is a PIN,GROOVED,HEADLESS.
What parts can replace 502581?
There are 16 known substitutes for 502581: H5582, 48-15021, EW7197 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 502581?
502581 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-010-7317. This indicates validated use in U.S. government and defense supply chains.
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