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SM-B-187328 — Technical Data Sheet

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— · 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,HOLLOW is a the manufacturer industrial component. Key specifications include material: PLASTIC PHENOLIC OVERALL, first_end_style: SQUARE, inside_diameter: 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN, pin_overall_length: 1.125 INCHES NOMINAL IN, pin_overall_diameter: 0.3750 INCHES NOMINAL IN, material_document_and_classification: MIL-P-79 FORM TM TYPE PBE MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5315-00-658-0610, 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
SM-B-187328
NSN: 5315-00-658-0610
FSC: 5315
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialPLASTIC PHENOLIC OVERALL
first_end_styleSQUARE
inside_diameter0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN
pin_overall_length1.125 INCHES NOMINAL IN
pin_overall_diameter0.3750 INCHES NOMINAL IN
material_document_and_classificationMIL-P-79 FORM TM TYPE PBE MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
second_end_relationship_with_first_endIDENTICAL
NSN5315-00-658-0610
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SM-B-187328 · 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
•
PIN OVERALL DIAMETER: 0.3750 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN
•
FIRST END STYLE: SQUARE
•
MATERIAL: PLASTIC PHENOLIC OVERALL
•
PIN OVERALL LENGTH: 1.125 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-79 FORM TM TYPE PBE MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
PIN OVERALL DIAMETER0.3750 INCHES NOMINAL IN
INSIDE DIAMETER0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN
FIRST END STYLESQUARE
MATERIALPLASTIC PHENOLIC OVERALL
PIN OVERALL LENGTH1.125 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-79 FORM TM TYPE PBE MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
AMS-QQ-A-200/3InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
ASTM B221InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
QQ-A-200/3InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
56023InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SM-B-187328?
SM-B-187328 is a PIN,HOLLOW.
What parts can replace SM-B-187328?
There are 4 known substitutes for SM-B-187328: AMS-QQ-A-200/3, ASTM B221, QQ-A-200/3 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SM-B-187328?
SM-B-187328 is cataloged in the Federal Logistics Information System under NSN 5315-00-658-0610. This indicates validated use in U.S. government and defense supply chains.
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Last verified: October 2026