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Technical Data Sheet
PartsTable / COMPONENT / PL8
PL8 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

CAPACITOR,FIXED,PLASTIC DIELECTR. Key specifications include material: STEEL COMP 303SE OVERALL, head_style: FILLISTER, head_height: 0.160 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.310 INCHES NOMINAL IN, thread_length: 0.190 INCHES NOMINAL 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 5305-00-178-8642, 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
PL8
NSN: 5305-00-178-8642
FSC: 5305
CAGE: 29440 — W. M. BERG, INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 303SE OVERALL
head_styleFILLISTER
head_height0.160 INCHES NOMINAL IN
thread_class2A A
head_diameter0.310 INCHES NOMINAL IN
thread_length0.190 INCHES NOMINAL IN
overall_length8.000 INCHES NOMINAL IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.2505 INCHES NOMINAL IN
hardness_rating28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length0.251 INCHES MINIMUM AND 0.253 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
NSN5305-00-178-8642
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: PL8 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SHOULDER DIAMETER: 0.186 INCHES MINIMUM AND 0.187 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL: STEEL COMP 416 OVERALL
•
HARDNESS RATING: 28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
THREAD QUANTITY PER INCH: 32
•
NOMINAL THREAD DIAMETER: 0.164 INCHES IN
•
HEAD HEIGHT: 0.156 INCHES NOMINAL IN
•
HEAD STYLE: FLAT CHAMFER
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS (FLIS)
SHOULDER DIAMETER0.186 INCHES MINIMUM AND 0.187 INCHES MAXIMUM FIRST SHOULDER IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIALSTEEL COMP 416 OVERALL
HARDNESS RATING28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
THREAD QUANTITY PER INCH32
NOMINAL THREAD DIAMETER0.164 INCHES IN
HEAD HEIGHT0.156 INCHES NOMINAL IN
HEAD STYLEFLAT CHAMFER
FASTENER LENGTH0.439 INCHES MINIMUM AND 0.441 INCHES MAXIMUM IN
THREAD LENGTH0.188 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
B107.23MInterchangeable
interchangeable cross-reference
interchangeable
5120PL2170109Interchangeable
interchangeable cross-reference
interchangeable
2112081Interchangeable
interchangeable cross-reference
interchangeable
4317Interchangeable
IBM 8.5GB 10k Disk Scsi-U2 80p 3.5in
interchangeable
PL-8Interchangeable
interchangeable cross-reference
interchangeable
12273417-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PL8?
PL8 is a CAPACITOR,FIXED,PLASTIC DIELECTR.
What parts can replace PL8?
There are 6 known substitutes for PL8: B107.23M, 5120PL2170109, 2112081 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PL8?
PL8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-178-8642. 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