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S0121-K120 — SNAP HOOK

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

S0121-K120: SNAP HOOK.

The SNAP HOOK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 321 HOOK, overall_length: 4.750 INCHES NOMINAL IN, inside_diameter: 0.590 INCHES NOMINAL IN, end_connection_style: ROUND EYE, hook_style_designator: PIVOT, end_item_identification: F-35 AIRCRAFT SUPPORT EQUIPMENT. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-671-0381, 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
S0121-K120
NSN: 5340-01-671-0381
FSC: 5340 — Hardware, Commercial
CAGE: 1CXX6 — SUNCOR STAINLESS, INC (USA)
SPECIFICATIONS
materialSTEEL COMP 321 HOOK
overall_length4.750 INCHES NOMINAL IN
inside_diameter0.590 INCHES NOMINAL IN
end_connection_styleROUND EYE
hook_style_designatorPIVOT
end_item_identificationF-35 AIRCRAFT SUPPORT EQUIPMENT
material_document_and_classificationQQ-S-766, CLASS 321 FED SPEC SINGLE MATERIAL RESPONSE HOOK
part_name_assigned_by_controlling_agencyKEY LOCK SPRING CLIP WITH EYE
NSN5340-01-671-0381
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: S0121-K120 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 DOCUMENT AND CLASSIFICATION: QQ-S-766, CLASS 321 FED SPEC SINGLE MATERIAL RESPONSE HOOK
•
END CONNECTION STYLE: ROUND EYE
•
INSIDE DIAMETER: 0.590 INCHES NOMINAL IN
•
HOOK STYLE DESIGNATOR: PIVOT
•
MATERIAL: STEEL COMP 321 HOOK
TECHNICAL CHARACTERISTICS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766, CLASS 321 FED SPEC SINGLE MATERIAL RESPONSE HOOK
OVERALL LENGTH4.750 INCHES NOMINAL IN
END CONNECTION STYLEROUND EYE
INSIDE DIAMETER0.590 INCHES NOMINAL IN
HOOK STYLE DESIGNATORPIVOT
PART NAME ASSIGNED BY CONTROLLING AGENCYKEY LOCK SPRING CLIP WITH EYE
END ITEM IDENTIFICATIONF-35 AIRCRAFT SUPPORT EQUIPMENT
MATERIALSTEEL COMP 321 HOOK
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 S0121-K120?
S0121-K120 is a SNAP HOOK.
What is the NSN for S0121-K120?
S0121-K120 is cataloged in the U.S. Government catalog under NSN 5340-01-671-0381. This indicates validated use in U.S. government and defense supply chains.
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