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PartsTable / COMPONENT / SMB157398
SMB157398 ✓ 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 diameter: 0.1855 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN, material: STEEL OVERALL, overall_length: 1.016 INCHES MINIMUM AND 1.047 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES OVERALL, undercut_width: 0.025 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN, first_end_style: CHAMFERED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-597-9673, 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
SMB157398
NSN: 5315-00-597-9673
FSC: 5315
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
diameter0.1855 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN
materialSTEEL OVERALL
overall_length1.016 INCHES MINIMUM AND 1.047 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES OVERALL
undercut_width0.025 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
first_end_styleCHAMFERED
effective_length0.828 INCHES MINIMUM AND 0.859 INCHES MAXIMUM IN
style_designatorGROOVE
surface_treatmentPHOSPHATE OVERALL
undercut_diameter0.147 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
first_end_locationBOTH ENDS
first_end_taper_angle45.0 DEGREES NOMINAL
NSN5315-00-597-9673
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SMB157398 · 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
•
FIRST END TAPER LENGTH: 0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
•
DIAMETER: 0.1855 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN
•
SECOND UNDERCUT WIDTH: 0.025 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
•
UNDERCUT DIAMETER: 0.147 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PHOSPHATE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
FIRST END TAPER ANGLE: 45.0 DEGREES NOMINAL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH1.016 INCHES MINIMUM AND 1.047 INCHES MAXIMUM IN
FIRST END TAPER LENGTH0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
DIAMETER0.1855 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN
SECOND UNDERCUT WIDTH0.025 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
UNDERCUT DIAMETER0.147 INCHES MINIMUM AND 0.149 INCHES MAXIMUM IN
SURFACE TREATMENTPHOSPHATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
FIRST END TAPER ANGLE45.0 DEGREES NOMINAL
STYLE DESIGNATORGROOVE
FIRST END STYLECHAMFERED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
PH20Interchangeable
interchangeable cross-reference
interchangeable
664340Interchangeable
interchangeable cross-reference
interchangeable
110AInterchangeable
interchangeable cross-reference
interchangeable
544-00822-99Interchangeable
interchangeable cross-reference
interchangeable
52872Interchangeable
interchangeable cross-reference
interchangeable
87-11-260-16Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SMB157398?
SMB157398 is a PIN,GROOVED,HEADLESS.
What parts can replace SMB157398?
There are 7 known substitutes for SMB157398: PH20, 664340, 110A and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SMB157398?
SMB157398 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-597-9673. 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