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Technical Data Sheet
PartsTable / COMPONENT / 004C3021-1
004C3021-1 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The SNAP HOOK is a the manufacturer industrial component. Key specifications include material: STEEL HOOK, design_type: LOOSE, overall_length: 4.000 INCHES NOMINAL IN, inside_diameter: 0.625 INCHES NOMINAL IN, unattached_ring: NOT INCLUDED, end_connection_style: ROUND EYE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-391-9181, 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
004C3021-1
NSN: 5340-01-391-9181
FSC: 5340
CAGE: 00994 — COLUMBUS JACK CORPORATION DIV COLUMBUS JACK (USA)
SPECIFICATIONS
materialSTEEL HOOK
design_typeLOOSE
overall_length4.000 INCHES NOMINAL IN
inside_diameter0.625 INCHES NOMINAL IN
unattached_ringNOT INCLUDED
end_connection_styleROUND EYE
hook_style_designatorPIVOT
rubber_covered_featureNOT INCLUDED
NSN5340-01-391-9181
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 004C3021-1 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: STEEL HOOK
•
HOOK STYLE DESIGNATOR: PIVOT
•
UNATTACHED RING: NOT INCLUDED
•
RUBBER COVERED FEATURE: NOT INCLUDED
•
DESIGN TYPE: LOOSE
•
END CONNECTION STYLE: ROUND EYE
•
INSIDE DIAMETER: 0.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL HOOK
HOOK STYLE DESIGNATORPIVOT
UNATTACHED RINGNOT INCLUDED
RUBBER COVERED FEATURENOT INCLUDED
OVERALL LENGTH4.000 INCHES NOMINAL IN
DESIGN TYPELOOSE
END CONNECTION STYLEROUND EYE
INSIDE DIAMETER0.625 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
NP38165Interchangeable
interchangeable cross-reference
interchangeable
314278Interchangeable
interchangeable cross-reference
interchangeable
16X79Interchangeable
interchangeable cross-reference
interchangeable
98676R1Interchangeable
interchangeable cross-reference
interchangeable
7637616P0006Interchangeable
interchangeable cross-reference
interchangeable
RF6622-825SInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 004C3021-1?
004C3021-1 is a SNAP HOOK.
What parts can replace 004C3021-1?
There are 8 known substitutes for 004C3021-1: NP38165, 314278, 16X79 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 004C3021-1?
004C3021-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-391-9181. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026