MS51990 — RING,LOCK,SERRATED

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

MS51990: RING,LOCK,SERRATED.

The RING,LOCK,SERRATED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1117, overall_height: 0.145 INCHES NOMINAL IN, pilot_diameter: 0.560 INCHES NOMINAL IN, inside_diameter: 0.465 INCHES MINIMUM AND 0.472 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE, inner_serration_quantity: 26. This part is cataloged in the U.S.

Government catalog under NSN 5365-00-149-8831, 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

MS51990

NSN: 5365-00-149-8831
NIINs: 001498831, 002184927, 002184929, 003855330, 007621908
FSC: 5365 — Bushings, Rings, Shims, and Spacers
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

SPECIFICATIONS

material	STEEL COMP 1117
overall_height	0.145 INCHES NOMINAL IN
pilot_diameter	0.560 INCHES NOMINAL IN
inside_diameter	0.465 INCHES MINIMUM AND 0.472 INCHES MAXIMUM IN
surface_treatment	CADMIUM AND CHROMATE
inner_serration_quantity	26
overall_outside_diameter	0.620 INCHES MINIMUM AND 0.629 INCHES MAXIMUM IN
side_outer_serrations_omitted_for_close_edge_installation	TWO SIDES
NSN	5365-00-149-8831

COMPONENT DIAGRAM

KEY FEATURES

•

OVERALL OUTSIDE DIAMETER: 1.166 INCHES MINIMUM AND 1.175 INCHES MAXIMUM IN

•

INNER SERRATION QUANTITY: 38

•

PILOT DIAMETER: 1.078 INCHES NOMINAL IN

•

INSIDE DIAMETER: 0.905 INCHES MINIMUM AND 0.912 INCHES MAXIMUM IN

•

SIDE OUTER SERRATIONS OMITTED FOR CLOSE EDGE INSTALLATION: TWO SIDES

•

SURFACE TREATMENT: CADMIUM AND CHROMATE

•

MATERIAL: STEEL COMP 1117

TECHNICAL CHARACTERISTICS

OVERALL HEIGHT	0.176 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER	1.166 INCHES MINIMUM AND 1.175 INCHES MAXIMUM IN
INNER SERRATION QUANTITY	38
PILOT DIAMETER	1.078 INCHES NOMINAL IN
INSIDE DIAMETER	0.905 INCHES MINIMUM AND 0.912 INCHES MAXIMUM IN
SIDE OUTER SERRATIONS OMITTED FOR CLOSE EDGE INSTALLATION	TWO SIDES
SURFACE TREATMENT	CADMIUM AND CHROMATE
MATERIAL	STEEL COMP 1117

SUBSTITUTES & CROSS-REFERENCES 8

RLRR72SA11Reference document

Same NSN cross-reference

Reference document — Secondary reference

RLRR72SB11Reference document

Same NSN cross-reference

Reference document — Secondary reference

MIL-I-45910Reference document

Same NSN cross-reference

Reference document — Secondary reference

RL72SB-6Reference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

5365PL0811344Reference document

Same NSN cross-reference

Reference document — Informative reference only

A-A-59558Reference document

Same NSN cross-reference

Reference document — Identification reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is MS51990?

MS51990 is a RING,LOCK,SERRATED.

What parts can replace MS51990?

There are 8 known substitutes for MS51990: RLRR72SA11, RLRR72SB11, MIL-I-45910 and 5 more. Substitute compatibility should be verified for your specific system.

What is the NSN for MS51990?

MS51990 is cataloged in the U.S. Government catalog under NSN 5365-00-149-8831. This indicates validated use in U.S. government and defense supply chains.

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