120399 — BATTERY MONITOR

✓ Government record, cited

— · NUT WASHER

PRODUCT OVERVIEW

120399: BATTERY MONITOR.

The BATTERY MONITOR 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 material: STEEL OVERALL, nut_style: SQUARE, nut_height: 0.208 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-012-0399, 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

120399

NSN: 5310-00-012-0399
NIINs: 000120399, 016056885
FSC: 5310 — Nuts and Washers
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)

SPECIFICATIONS

material	STEEL OVERALL
nut_style	SQUARE
nut_height	0.208 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
thread_class	2B
thread_series	UNIFIED NATIONAL COARSE (UNC)
thread_direction	RIGHT-HAND
surface_treatment	CADMIUM OR ZINC OVERALL
width_across_flats	0.545 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
nominal_thread_size	0.312 INCHES IN
bearing_surface_type	FLAT
end_item_identification	REFRIGERATOR, BLOOD
thread_quantity_per_inch	18
NSN	5310-00-012-0399

COMPONENT DIAGRAM

KEY FEATURES

•

WIDTH ACROSS FLATS: 0.545 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN

•

THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)

•

THREAD DIRECTION: RIGHT-HAND

•

NOMINAL THREAD SIZE: 0.312 INCHES IN

•

NUT HEIGHT: 0.208 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN

•

SURFACE TREATMENT: CADMIUM OR ZINC OVERALL

•

NUT STYLE: SQUARE

•

THREAD CLASS: 2B

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

WIDTH ACROSS FLATS	0.545 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
THREAD SERIES	UNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTION	RIGHT-HAND
NOMINAL THREAD SIZE	0.312 INCHES IN
NUT HEIGHT	0.208 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN
SURFACE TREATMENT	CADMIUM OR ZINC OVERALL
NUT STYLE	SQUARE
THREAD CLASS	2B
THREAD QUANTITY PER INCH	18
MATERIAL	STEEL OVERALL

SUBSTITUTES & CROSS-REFERENCES 4

MILB933TYPEBReference document

Same NSN cross-reference

Reference document — Identification reference

55939Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

153684Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

24D05Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusCancelled· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 120399?

120399 is a BATTERY MONITOR.

What parts can replace 120399?

There are 4 known substitutes for 120399: MILB933TYPEB, 55939, 153684 and 1 more. Substitute compatibility should be verified for your specific system.

What is the NSN for 120399?

120399 is cataloged in the U.S. Government catalog under NSN 5310-00-012-0399. This indicates validated use in U.S. government and defense supply chains.

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120399 — BATTERY MONITOR

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