PartsTable
Technical Data Sheet
S258 ✓ 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 SEMICONDUCTOR DEVICES,UNITIZED is a the manufacturer industrial component. Key specifications include material: COPPER OR COPPER ALLOY OVERALL, nut_style: HEXAGON, nut_height: 0.171 INCHES NOMINAL IN, plate_type: NEGATIVE AND POSITIVE, thread_class: 3B, largest_width: 0.502 INCHES SINGLE END 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 5310-00-017-7573, 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
S258
NSN: 5310-00-017-7573
FSC: 5310
CAGE: 15434 — CUMMINS INC. (USA)
SPECIFICATIONS
materialCOPPER OR COPPER ALLOY OVERALL
nut_styleHEXAGON
nut_height0.171 INCHES NOMINAL IN
plate_typeNEGATIVE AND POSITIVE
thread_class3B
cell_quantity3
largest_width0.502 INCHES SINGLE END IN
overall_width0.502 INCHES IN
terminal_typeTAPER POST
thread_seriesUNIFIED NATIONAL COARSE (UNC)
overall_height10.875 INCHES NOMINAL IN
overall_length1.000 INCHES IN
NSN5310-00-017-7573
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S258 · 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
THREAD CLASS: 3B
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE: 0.250 INCHES IN
THREAD QUANTITY PER INCH: 20
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
NUT HEIGHT: 0.171 INCHES NOMINAL IN
NUT STYLE: HEXAGON
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NOMINAL THREAD SIZE0.250 INCHES IN
THREAD QUANTITY PER INCH20
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NUT HEIGHT0.171 INCHES NOMINAL IN
NUT STYLEHEXAGON
MATERIALSTEEL OVERALL
WIDTH ACROSS FLATS0.500 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
BCI 7-DInterchangeable
interchangeable cross-reference
interchangeable
506419Interchangeable
interchangeable cross-reference
interchangeable
D-7DMInterchangeable
interchangeable cross-reference
interchangeable
720641-3Interchangeable
interchangeable cross-reference
interchangeable
DMS 85091BInterchangeable
interchangeable cross-reference
interchangeable
S258Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S258?
S258 is a SEMICONDUCTOR DEVICES,UNITIZED.
What parts can replace S258?
There are 11 known substitutes for S258: BCI 7-D, 506419, D-7DM and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S258?
S258 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-017-7573. This indicates validated use in U.S. government and defense supply chains.
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