PartsTable
Technical Data Sheet
PartsTable / MRO / 628-4
628-4 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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

The LEAD,STORAGE BATTERY 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 length: 8.000 INCHES NOMINAL IN, material: COPPER ALLOY, head_style: PAN, design_type: RIGID-METAL, head_height: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN, lens_legend: POWER ON SINGLE LIGHT FIRST POSITION HORIZONTAL FULL DISPLAY DIVISION A. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-206-1288, 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→ 628-4
NSN: 5305-00-206-1288
FSC: 5305
CAGE: 36378 — RAYTHEON TECHNICAL SERVICES COMPANY (USA)
SPECIFICATIONS
length8.000 INCHES NOMINAL IN
materialCOPPER ALLOY
head_stylePAN
design_typeRIGID-METAL
head_height0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
lens_legendPOWER ON SINGLE LIGHT FIRST POSITION HORIZONTAL FULL DISPLAY DIVISION A
thread_class2A A
head_diameter0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
overall_width0.433 INCHES MAXIMUM IN
thread_length0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
accessory_typeVALVE
inclosure_typeFULLY INCLOSED
NSN5305-00-206-1288
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 628-4 · 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
•
SCREW MATERIAL: COPPER ALLOY
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE
•
HEAD DIAMETER: 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
THREAD CLASS: 2A A
•
THREAD LENGTH: 0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
HEAD HEIGHT: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
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)
SCREW MATERIALCOPPER ALLOY
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE
HEAD DIAMETER0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
THREAD CLASS2A A
THREAD LENGTH0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.138 INCHES IN
HEAD HEIGHT0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
HEAD STYLEPAN
FASTENER LENGTH0.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
21046Interchangeable
interchangeable cross-reference
interchangeable
SM-D-587457Interchangeable
interchangeable cross-reference
interchangeable
11245Interchangeable
interchangeable cross-reference
interchangeable
560Interchangeable
interchangeable cross-reference
interchangeable
K560Interchangeable
interchangeable cross-reference
interchangeable
P4387AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy 628-4?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 628-4?
628-4 is a LEAD,STORAGE BATTERY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 628-4?
There are 30 known substitutes for 628-4: 21046, SM-D-587457, 11245 and 27 more. Substitute compatibility should be verified for your specific system.
Is 628-4 still available?
628-4 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 628-4

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026