B-4 ✓ Verified by PartsTable

— · MRO · MRO_GENERAL

WHAT YOU NEED TO KNOW

SAS cables have specific lane counts: 4i (internal) or 4e (external) Cable length matters — too short won't reach, too long creates clutter

Verify connector type on BOTH ends — many SAS cables are asymmetric

PRODUCT OVERVIEW

HOLDER,ELECTROSTATIC DISCHARGER. Key specifications include depth: 6.203 INCHES NOMINAL IN, width: 3.250 INCHES NOMINAL IN, height: 3.250 INCHES NOMINAL IN, material: ALUMINUM, base_style: WIRE LEADS, DOWN, bulb_style: T (TUBULAR). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-00-409-9273, 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→ B-4

NSN: 5999-00-409-9273
FSC: 5999
CAGE: 63743 — WARD LEONARD CT LLC (USA)

SPECIFICATIONS

depth	6.203 INCHES NOMINAL IN
width	3.250 INCHES NOMINAL IN
height	3.250 INCHES NOMINAL IN
material	ALUMINUM
base_style	WIRE LEADS, DOWN
bulb_style	T (TUBULAR)
contact_type	PIN
current_type	AC
set_quantity	5
body_diameter	4.750 INCHES NOMINAL IN
bore_diameter	0.2495 INCHES NOMINAL IN
leg_extension	INCLUDED
NSN	5999-00-409-9273

COMPONENT DIAGRAM

KEY FEATURES

•

MATERIAL: ALUMINUM ALLOY

•

MOUNTING FACILITY TYPE AND QUANTITY: 2 UNTHREADED HOLE(S)

TECHNICAL CHARACTERISTICS (FLIS)

MATERIAL	ALUMINUM ALLOY
OVERALL HEIGHT	0.406 INCHES NOMINAL IN
MOUNTING FACILITY TYPE AND QUANTITY	2 UNTHREADED HOLE(S)
OVERALL LENGTH	2.281 INCHES NOMINAL IN
MATERIAL	ALUMINUM ALLOY
OVERALL HEIGHT	0.406 INCHES NOMINAL IN
MOUNTING FACILITY TYPE AND QUANTITY	2 UNTHREADED HOLE(S)
OVERALL LENGTH	2.281 INCHES NOMINAL IN

VERIFIED SUBSTITUTES & CROSS-REFERENCES 3

8340B-STInterchangeable

interchangeable cross-reference

interchangeable

8330-STInterchangeable

interchangeable cross-reference

interchangeable

8340-STInterchangeable

interchangeable cross-reference

interchangeable

LIFECYCLE

StatusACTIVE

AvailabilityOEM and secondary market

RoHS CompliantEAR99ESD SensitiveNot HAZMAT

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FREQUENTLY ASKED QUESTIONS

What is B-4?

B-4 is a HOLDER,ELECTROSTATIC DISCHARGER. It is classified as a MRO (MRO_GENERAL).

What parts can replace B-4?

There are 3 known substitutes for B-4: 8340B-ST, 8330-ST, 8340-ST. Substitute compatibility should be verified for your specific system.

What is the NSN for B-4?

B-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-00-409-9273. This indicates validated use in U.S. government and defense supply chains.

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