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91580A242 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91580A242: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, ring_style: INTERNAL, usage_design: INTERNAL, outside_diameter: 2.072 INCHES NOMINAL IN, surface_treatment: PASSIVATE, supplementary_features: 0.062 INCH THICKNESS IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-689-2251, 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
91580A242
NSN: 5325-01-689-2251
FSC: 5325 — Fastening Devices
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
ring_styleINTERNAL
usage_designINTERNAL
outside_diameter2.072 INCHES NOMINAL IN
surface_treatmentPASSIVATE
supplementary_features0.062 INCH THICKNESS IN
material_hardness_rating43.0 ROCKWELL C NOMINAL
part_name_assigned_by_controlling_agencyINTERNAL RETAINING RING
NSN5325-01-689-2251
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91580A242 · 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
•
MATERIAL HARDNESS RATING: 43.0 ROCKWELL C NOMINAL
•
USAGE DESIGN: INTERNAL
•
SUPPLEMENTARY FEATURES: 0.062 INCH THICKNESS IN
•
OUTSIDE DIAMETER: 2.072 INCHES NOMINAL IN
•
RING STYLE: INTERNAL
•
SURFACE TREATMENT: PASSIVATE
•
MATERIAL: STEEL CORROSION RESISTING
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING43.0 ROCKWELL C NOMINAL
USAGE DESIGNINTERNAL
SUPPLEMENTARY FEATURES0.062 INCH THICKNESS IN
OUTSIDE DIAMETER2.072 INCHES NOMINAL IN
RING STYLEINTERNAL
SURFACE TREATMENTPASSIVATE
PART NAME ASSIGNED BY CONTROLLING AGENCYINTERNAL RETAINING RING
MATERIALSTEEL CORROSION RESISTING
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91580A242?
91580A242 is a RING,RETAINING.
What is the NSN for 91580A242?
91580A242 is cataloged in the U.S. Government catalog under NSN 5325-01-689-2251. 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.