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Technical Data Sheet
187176 ✓ 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 CUP,TAPERED ROLLER BEARING is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL OVERALL, overall_width: 1.3750 INCHES NOMINAL IN, outside_diameter: 7.5000 INCHES NOMINAL IN, style_designator: NORMAL ANGLE, backface_corner_radius: 0.1250 INCHES NOMINAL IN, standard_tolerance_designation: AFBMA CLASS 2. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-021-9702, 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
187176
NSN: 5310-00-021-9702
FSC: 5310
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width1.3750 INCHES NOMINAL IN
outside_diameter7.5000 INCHES NOMINAL IN
style_designatorNORMAL ANGLE
backface_corner_radius0.1250 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN5310-00-021-9702
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 187176 · 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 QUANTITY PER INCH: 24
NOMINAL THREAD SIZE: 0.312 INCHES IN
THREAD SERIES: UNF
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NUT STYLE: HEXAGON
NONDEFINITIVE SPEC/STD DATA: A TYPE
MATERIAL: STEEL OVERALL
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH24
NOMINAL THREAD SIZE0.312 INCHES IN
THREAD SERIESUNF
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NUT STYLEHEXAGON
NONDEFINITIVE SPEC/STD DATAA TYPE
MATERIALSTEEL OVERALL
WIDTH ACROSS FLATS0.563 INCHES NOMINAL IN
NUT HEIGHT0.172 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
102161Interchangeable
interchangeable cross-reference
interchangeable
FFS111STYLE1SInterchangeable
interchangeable cross-reference
interchangeable
71750Interchangeable
interchangeable cross-reference
interchangeable
313407Interchangeable
interchangeable cross-reference
interchangeable
60526Interchangeable
interchangeable cross-reference
interchangeable
AM-2321/SIAInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 187176?
187176 is a CUP,TAPERED ROLLER BEARING.
What parts can replace 187176?
There are 19 known substitutes for 187176: 102161, FFS111STYLE1S, 71750 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 187176?
187176 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-021-9702. This indicates validated use in U.S. government and defense supply chains.
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