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Technical Data Sheet
PartsTable / COMPONENT / P309
P309 ✓ 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,PAPER DIELECTRIC. Key specifications include material: COTTON FILTERING MEDIUM, body_width: 2.120 INCHES MAXIMUM IN, ring_style: EXTERNAL, body_height: 2.000 INCHES NOMINAL IN, design_type: NONREUSABLE, usage_design: EXTERNAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-282-6970, 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
P309
NSN: 5325-00-282-6970
FSC: 5325
CAGE: 86184 — GRISWOLD INDUSTRIES DBA CLA-VAL CO (USA)
SPECIFICATIONS
materialCOTTON FILTERING MEDIUM
body_width2.120 INCHES MAXIMUM IN
ring_styleEXTERNAL
body_height2.000 INCHES NOMINAL IN
design_typeNONREUSABLE
usage_designEXTERNAL
body_diameter4.312 INCHES NOMINAL IN
flow_directionOUTSIDE IN
inclosure_typeOPEN
overall_length3.190 INCHES MINIMUM AND 3.310 INCHES MAXIMUM IN
inside_diameter1.257 INCHES MINIMUM AND 1.282 INCHES MAXIMUM IN
major_thickness0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
NSN5325-00-282-6970
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: P309 · 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
•
USAGE DESIGN: EXTERNAL
•
INSIDE DIAMETER: 1.257 INCHES MINIMUM AND 1.282 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1066 OR STEEL COMP 1069 OR STEEL COMP 1070 OR STEEL COMP 1072 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1086 OR STEEL COMP 1090
•
SURFACE TREATMENT: PHOSPHATE
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66 AISI 1066 OR 1069 OR 1070 OR 1072 OR 1074 OR 1075 OR 1078 OR 1080 OR 1084 OR 1086 OR 1090 FED STD SINGLE MATERIAL RESPONSE
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
MATERIAL HARDNESS RATING: 47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
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)
USAGE DESIGNEXTERNAL
INSIDE DIAMETER1.257 INCHES MINIMUM AND 1.282 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1066 OR STEEL COMP 1069 OR STEEL COMP 1070 OR STEEL COMP 1072 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1086 OR STEEL COMP 1090
SURFACE TREATMENTPHOSPHATE
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66 AISI 1066 OR 1069 OR 1070 OR 1072 OR 1074 OR 1075 OR 1078 OR 1080 OR 1084 OR 1086 OR 1090 FED STD SINGLE MATERIAL RESPONSE
CASEHARDENING INDICATORNOT CASEHARDENED
MATERIAL HARDNESS RATING47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MAJOR THICKNESS0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
RING STYLEEXTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
P8180Interchangeable
interchangeable cross-reference
interchangeable
B2300G1Interchangeable
interchangeable cross-reference
interchangeable
21F142Interchangeable
interchangeable cross-reference
interchangeable
20C30Interchangeable
interchangeable cross-reference
interchangeable
P309-12Interchangeable
interchangeable cross-reference
interchangeable
P309XInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is P309?
P309 is a CAPACITOR,FIXED,PAPER DIELECTRIC.
What parts can replace P309?
There are 19 known substitutes for P309: P8180, B2300G1, 21F142 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for P309?
P309 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-282-6970. 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