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91590A126 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

91590A126: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, ring_style: EXTERNAL, usage_design: EXTERNAL, inside_diameter: 0.579 INCHES NOMINAL IN, major_thickness: 0.035 INCHES NOMINAL IN, strength_rating: ERR-060. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-538-0641, 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
91590A126
NSN: 5325-01-538-0641
FSC: 5325 — Fastening Devices
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
ring_styleEXTERNAL
usage_designEXTERNAL
inside_diameter0.579 INCHES NOMINAL IN
major_thickness0.035 INCHES NOMINAL IN
strength_ratingERR-060
casehardening_indicatorCASEHARDENED
material_hardness_rating47.0 ROCKWELL C NOMINAL
cross-sectional_shape_styleRECTANGULAR
part_name_assigned_by_controlling_agencyESTERNAL RETAINING RING
NSN5325-01-538-0641
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 91590A126 · 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: 47.0 ROCKWELL C NOMINAL
•
USAGE DESIGN: EXTERNAL
•
STRENGTH RATING: ERR-060
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MAJOR THICKNESS: 0.035 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.579 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: CASEHARDENED
•
RING STYLE: EXTERNAL
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING47.0 ROCKWELL C NOMINAL
USAGE DESIGNEXTERNAL
STRENGTH RATINGERR-060
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MAJOR THICKNESS0.035 INCHES NOMINAL IN
INSIDE DIAMETER0.579 INCHES NOMINAL IN
CASEHARDENING INDICATORCASEHARDENED
RING STYLEEXTERNAL
PART NAME ASSIGNED BY CONTROLLING AGENCYESTERNAL 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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 91590A126?
91590A126 is a RING,RETAINING.
What is the NSN for 91590A126?
91590A126 is cataloged in the U.S. Government catalog under NSN 5325-01-538-0641. 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.