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HJ-557 — JACK PAD

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

HJ-557: JACK PAD.

The JACK PAD is a the manufacturer industrial component. Key specifications include special_features: 10 AND 12 TON SINGLE STAGE JACKS, end_item_identification: MODELS: 02-1032-0100;02-1040-0100;02-1256-0100;02-1036-0100;02-1248-0100;02-7805-0100;02-7810-0100, part_name_assigned_by_controlling_agency: JACK PAD. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-610-6130, 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
HJ-557
NSN: 5340-01-610-6130
FSC: 5340 — Hardware, Commercial
CAGE: 1RBA3 — TRONAIR INC (USA)
SPECIFICATIONS
special_features10 AND 12 TON SINGLE STAGE JACKS
end_item_identificationMODELS: 02-1032-0100;02-1040-0100;02-1256-0100;02-1036-0100;02-1248-0100;02-7805-0100;02-7810-0100
part_name_assigned_by_controlling_agencyJACK PAD
NSN5340-01-610-6130
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: HJ-557 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURES10 AND 12 TON SINGLE STAGE JACKS
PART NAME ASSIGNED BY CONTROLLING AGENCYJACK PAD
END ITEM IDENTIFICATIONMODELS: 02-1032-0100;02-1040-0100;02-1256-0100;02-1036-0100;02-1248-0100;02-7805-0100;02-7810-0100
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 HJ-557?
HJ-557 is a JACK PAD.
What is the NSN for HJ-557?
HJ-557 is cataloged in the U.S. Government catalog under NSN 5340-01-610-6130. 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.