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3HD812 — TUBE ASSEMBLY,PIN-SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3HD812: TUBE ASSEMBLY,PIN-SPRING.

The TUBE ASSEMBLY,PIN-SPRING is a the manufacturer industrial component. Key specifications include overall_length: 10.410 INCHES NOMINAL IN, end_item_identification: IPF FLATRACK, 2320-01-304-2277 PLS (PALLETIZED LOADING SYSTEM). This part is cataloged in the U.S.

Government catalog under NSN 5340-01-421-9489, 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
3HD812
NSN: 5340-01-421-9489
FSC: 5340 — Hardware, Commercial
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
overall_length10.410 INCHES NOMINAL IN
end_item_identificationIPF FLATRACK, 2320-01-304-2277 PLS (PALLETIZED LOADING SYSTEM)
NSN5340-01-421-9489
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3HD812 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
OVERALL LENGTH10.410 INCHES NOMINAL IN
SPECIAL FEATURESCONSISTS OF TUBE ASSEMBLY P/N 12440999, THRUST WASHER P/N 12440650, THREAD ACME NUT P/N 12440675, PRING SPRING RATCHET SMALL P/N 12440646, PING SPRING RATCHET LARGE P/N 12440647, O-RING P/N 12440956, EXPANSION PLUG P/N 12440639
END ITEM IDENTIFICATIONIPF FLATRACK, 2320-01-304-2277 PLS (PALLETIZED LOADING SYSTEM)
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 1
12440863Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3HD812?
3HD812 is a TUBE ASSEMBLY,PIN-SPRING.
What parts can replace 3HD812?
There is 1 known substitute for 3HD812: 12440863. Substitute compatibility should be verified for your specific system.
What is the NSN for 3HD812?
3HD812 is cataloged in the U.S. Government catalog under NSN 5340-01-421-9489. 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.