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Technical Data Sheet

332/A3879 — STOP,MECHANICAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

332/A3879: STOP,MECHANICAL.

The STOP,MECHANICAL is a the manufacturer industrial component. Key specifications include design_type: CYLINDRICAL, special_features: PART OF THE PERCUSSION UNIT BREAKER, fsc_application_data: JCB,HAMMERMASTER 033T 3CX,980/B0331, end_item_identification: 2420016831281,TRACTOR,WHEELED,INDUSTRIAL,JCB,MOD. HMEE, vehicle_design_control_activity: 0JKF0, part_name_assigned_by_controlling_agency: PIN TOOL RETAINER.

This part is cataloged in the U.S. Government catalog under NSN 5340-01-725-1971, 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
332/A3879
NSN: 5340-01-725-1971
FSC: 5340 — Hardware, Commercial
CAGE: 0JKF0 — JCB INC. (USA)
SPECIFICATIONS
design_typeCYLINDRICAL
special_featuresPART OF THE PERCUSSION UNIT BREAKER
fsc_application_dataJCB,HAMMERMASTER 033T 3CX,980/B0331
end_item_identification2420016831281,TRACTOR,WHEELED,INDUSTRIAL,JCB,MOD. HMEE
vehicle_design_control_activity0JKF0
part_name_assigned_by_controlling_agencyPIN TOOL RETAINER
NSN5340-01-725-1971
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 332/A3879 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
•
FSC APPLICATION DATA: JCB,HAMMERMASTER 033T 3CX,980/B0331
•
DESIGN TYPE: CYLINDRICAL
•
VEHICLE DESIGN CONTROL ACTIVITY: 0JKF0
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAJCB,HAMMERMASTER 033T 3CX,980/B0331
DESIGN TYPECYLINDRICAL
VEHICLE DESIGN CONTROL ACTIVITY0JKF0
SPECIAL FEATURESPART OF THE PERCUSSION UNIT BREAKER
PART NAME ASSIGNED BY CONTROLLING AGENCYPIN TOOL RETAINER
END ITEM IDENTIFICATION2420016831281,TRACTOR,WHEELED,INDUSTRIAL,JCB,MOD. HMEE
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 332/A3879?
332/A3879 is a STOP,MECHANICAL.
What is the NSN for 332/A3879?
332/A3879 is cataloged in the U.S. Government catalog under NSN 5340-01-725-1971. 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.