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128HM30019 — RETAINER,HELICAL COMPRESSION SPR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

128HM30019: RETAINER,HELICAL COMPRESSION SPR.

RETAINER,HELICAL COMPRESSION SPR. Key specifications include material: STEEL COMP 410, overall_height: 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN, style_designator: PARALLEL, end_hole_diameter: 1.625 INCHES MINIMUM AND 1.630 INCHES MAXIMUM IN, surface_treatment: PASSIVATE, body_inside_diameter: 2.173 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-914-3432, 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
128HM30019
NSN: 5340-00-914-3432
FSC: 5340 — Hardware, Commercial
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 410
overall_height0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
style_designatorPARALLEL
end_hole_diameter1.625 INCHES MINIMUM AND 1.630 INCHES MAXIMUM IN
surface_treatmentPASSIVATE
body_inside_diameter2.173 INCHES NOMINAL IN
fsc_application_dataCYLINDER,ACTUATING,HYDRAULIC,AIRCRAFT
inside_chamfer_depth0.403 INCHES NOMINAL IN
body_outside_diameter2.360 INCHES NOMINAL IN
outside_chamfer_depth0.062 INCHES NOMINAL IN
mounting_hole_diameter0.061 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
NSN5340-00-914-3432
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 128HM30019 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: CYLINDER,ACTUATING,HYDRAULIC,AIRCRAFT
•
BODY OUTSIDE DIAMETER: 2.360 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PARALLEL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5613, TYPE 51410 ASSN STD SINGLE MATERIAL RESPONSE
•
MOUNTING HOLE DIAMETER: 0.061 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
•
INSIDE CHAMFER DEPTH: 0.403 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 2.173 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
FSC APPLICATION DATACYLINDER,ACTUATING,HYDRAULIC,AIRCRAFT
BODY OUTSIDE DIAMETER2.360 INCHES NOMINAL IN
STYLE DESIGNATORPARALLEL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5613, TYPE 51410 ASSN STD SINGLE MATERIAL RESPONSE
MOUNTING HOLE DIAMETER0.061 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
INSIDE CHAMFER DEPTH0.403 INCHES NOMINAL IN
BODY INSIDE DIAMETER2.173 INCHES NOMINAL IN
OUTSIDE CHAMFER ANGLE IN DEG45.0
CASEHARDENING INDICATORNOT CASEHARDENED
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 2
128HM30019-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
128HM30011-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is 128HM30019?
128HM30019 is a RETAINER,HELICAL COMPRESSION SPR.
What parts can replace 128HM30019?
There are 2 known substitutes for 128HM30019: 128HM30019-1, 128HM30011-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 128HM30019?
128HM30019 is cataloged in the U.S. Government catalog under NSN 5340-00-914-3432. 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.