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4-0091-2 — CAPACITOR,FIXED,ELECTROLYTIC

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

4-0091-2: CAPACITOR,FIXED,ELECTROLYTIC.

The CAPACITOR,FIXED,ELECTROLYTIC is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include body_style: W/O MTG FACILITIES, TERMINAL(S) ON ONE END, head_style: HEXAGON, body_length: 4.250 INCHES MAXIMUM IN, grip_length: 0.3690 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN, head_height: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN, thread_class: 2A A. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-151-0005, 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
MRO→ MRO_GENERAL→ 4-0091-2
NSN: 5306-00-151-0005
NIINs: 001510005, 010195077, 012689481
FSC: 5306 — Bolts
CAGE: 77294 — PIPER INDUSTRIAL MANUFACTURING COMPANY, LLC DIV PIPER INDUSTRIAL MANUFACTURING COMPANY (USA)
SPECIFICATIONS
body_styleW/O MTG FACILITIES, TERMINAL(S) ON ONE END
head_styleHEXAGON
body_length4.250 INCHES MAXIMUM IN
grip_length0.3690 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
head_height0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
thread_class2A A
body_diameter1.453 INCHES MAXIMUM IN
head_diameter0.500 INCHES NOMINAL IN
thread_length0.750 INCHES NOMINAL IN
fastener_length1.000 INCHES NOMINAL IN
groove_diameter0.191 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN
hardness_rating80.0 ROCKWELL B MINIMUM OVERALL
NSN5306-00-151-0005
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 4-0091-2 · 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
•
HEAD HEIGHT: 0.125 INCHES NOMINAL IN
•
FASTENER LENGTH: 1.396 INCHES MINIMUM AND 1.416 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
•
GROOVE DIAMETER: 0.191 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.324 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 5TH MATERIAL RESPONSE OR AMS 6300 ASSN STD 6TH MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: BUTTON
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
HEAD HEIGHT0.125 INCHES NOMINAL IN
FASTENER LENGTH1.396 INCHES MINIMUM AND 1.416 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
GROOVE DIAMETER0.191 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN
THREAD LENGTH0.324 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 5TH MATERIAL RESPONSE OR AMS 6300 ASSN STD 6TH MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEBUTTON
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
7601646Reference document
Same NSN cross-reference
Reference document — Secondary reference
AN24-22ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
B6812Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4-0091-2?
4-0091-2 is a CAPACITOR,FIXED,ELECTROLYTIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace 4-0091-2?
There are 3 known substitutes for 4-0091-2: 7601646, AN24-22A, B6812. Substitute compatibility should be verified for your specific system.
What is the NSN for 4-0091-2?
4-0091-2 is cataloged in the U.S. Government catalog under NSN 5306-00-151-0005. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.