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5428121 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

5428121: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: SPECIAL FLAT, usage_design: INTERNAL, inside_diameter: 0.997 INCHES NOMINAL IN, major_thickness: 0.035 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN, outside_diameter: 1.147 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-107-1137, 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
5428121
NSN: 5325-01-107-1137
FSC: 5325 — Fastening Devices
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL
ring_styleSPECIAL FLAT
usage_designINTERNAL
inside_diameter0.997 INCHES NOMINAL IN
major_thickness0.035 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN
outside_diameter1.147 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleDOUBLE OVAL
NSN5325-01-107-1137
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5428121 · 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
•
USAGE DESIGN: INTERNAL
•
CROSS-SECTIONAL SHAPE STYLE: DOUBLE OVAL
•
OUTSIDE DIAMETER: 1.147 INCHES NOMINAL IN
•
MAJOR THICKNESS: 0.035 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.997 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: SPECIAL FLAT
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
USAGE DESIGNINTERNAL
CROSS-SECTIONAL SHAPE STYLEDOUBLE OVAL
OUTSIDE DIAMETER1.147 INCHES NOMINAL IN
MAJOR THICKNESS0.035 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN
INSIDE DIAMETER0.997 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESPECIAL FLAT
MATERIALSTEEL
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 1
RR-109BXReference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5428121?
5428121 is a RING,RETAINING.
What parts can replace 5428121?
There is 1 known substitute for 5428121: RR-109BX. Substitute compatibility should be verified for your specific system.
What is the NSN for 5428121?
5428121 is cataloged in the U.S. Government catalog under NSN 5325-01-107-1137. 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.