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1-02521-609 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1-02521-609: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: SPIRAL ROUND, usage_design: EXTERNAL, inside_diameter: 0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN, outside_diameter: 0.494 INCHES NOMINAL IN, material_diameter: 0.032 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-453-0227, 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
1-02521-609
NSN: 5325-00-453-0227
FSC: 5325 — Fastening Devices
CAGE: K0654 — SAFRAN LANDING SYSTEMS UK LTD DIV SAFRAN LANDING SYSTEMS UK (GBR)
SPECIFICATIONS
materialSTEEL
ring_styleSPIRAL ROUND
usage_designEXTERNAL
inside_diameter0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
outside_diameter0.494 INCHES NOMINAL IN
material_diameter0.032 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleROUND
NSN5325-00-453-0227
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1-02521-609 · 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: EXTERNAL
•
MATERIAL DIAMETER: 0.032 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
OUTSIDE DIAMETER: 0.494 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: SPIRAL ROUND
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
USAGE DESIGNEXTERNAL
MATERIAL DIAMETER0.032 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEROUND
OUTSIDE DIAMETER0.494 INCHES NOMINAL IN
INSIDE DIAMETER0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESPIRAL ROUND
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
99-1448087Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1-02521-609?
1-02521-609 is a RING,RETAINING.
What parts can replace 1-02521-609?
There is 1 known substitute for 1-02521-609: 99-1448087. Substitute compatibility should be verified for your specific system.
What is the NSN for 1-02521-609?
1-02521-609 is cataloged in the U.S. Government catalog under NSN 5325-00-453-0227. 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.