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Technical Data Sheet
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201D4 — SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

201D4: SPRING.

The SPRING is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5340-00-321-5627, 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
201D4
NSN: 5340-00-321-5627
FSC: 5340 — Hardware, Commercial
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
Part Number201D4
NSN5340-00-321-5627
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 201D4 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
SUBSTITUTES & CROSS-REFERENCES 4
1199F422Reference document
Same NSN cross-reference
Reference document — Secondary reference
4G0675Reference document
Same NSN cross-reference
Reference document — Secondary reference
308880Reference document
Same NSN cross-reference
Reference document — Secondary reference
36047FReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 201D4?
201D4 is a SPRING.
What parts can replace 201D4?
There are 4 known substitutes for 201D4: 1199F422, 4G0675, 308880 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 201D4?
201D4 is cataloged in the U.S. Government catalog under NSN 5340-00-321-5627. This indicates validated use in U.S. government and defense supply chains.
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