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1000X21 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

1000X21: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, usage_design: EXTERNAL, inside_diameter: 0.185 INCHES NOMINAL IN, major_thickness: 0.025 INCHES NOMINAL IN, surface_treatment: CADMIUM OR ZINC, casehardening_indicator: NOT CASEHARDENED. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-682-1498, 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
1000X21
NSN: 5325-00-682-1498
FSC: 5325 — Fastening Devices
CAGE: 08292 — EASCO HAND TOOLS INC DBA DANAHER TOOL GROUP DIV DANAHER TOOL GROUP EASCO HAND TOOLS INC. (USA)
SPECIFICATIONS
materialSTEEL
ring_styleE
usage_designEXTERNAL
inside_diameter0.185 INCHES NOMINAL IN
major_thickness0.025 INCHES NOMINAL IN
surface_treatmentCADMIUM OR ZINC
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleROUNDED CORNERS
NSN5325-00-682-1498
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1000X21 · 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
•
CROSS-SECTIONAL SHAPE STYLE: ROUNDED CORNERS
•
MAJOR THICKNESS: 0.025 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.185 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: E
•
SURFACE TREATMENT: CADMIUM OR ZINC
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
USAGE DESIGNEXTERNAL
CROSS-SECTIONAL SHAPE STYLEROUNDED CORNERS
MAJOR THICKNESS0.025 INCHES NOMINAL IN
INSIDE DIAMETER0.185 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEE
SURFACE TREATMENTCADMIUM OR ZINC
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 4
587553CARX10Reference document
Same NSN cross-reference
Reference document — Secondary reference
X5133-21ZFReference document
Same NSN cross-reference
Reference document — Secondary reference
12Z5035-104Reference document
Same NSN cross-reference
Reference document — Secondary reference
587553Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1000X21?
1000X21 is a RING,RETAINING.
What parts can replace 1000X21?
There are 4 known substitutes for 1000X21: 587553CARX10, X5133-21ZF, 12Z5035-104 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1000X21?
1000X21 is cataloged in the U.S. Government catalog under NSN 5325-00-682-1498. 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.