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Technical Data Sheet
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MD31623-3423 — HOLDER,SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MD31623-3423: HOLDER,SPRING.

The HOLDER,SPRING is a the manufacturer industrial component. Key specifications include attachment_to_item_supported_method: HOLDS ITEM BY MEANS OF RETAINER 0.500 IN. DIA ON HEAD OF HOLDER IN, supporting_object/surface_attachment_method: ONE MTG HOLE ON STEM END OF HOLDER 0.125 IN.

DIA IN. This part is cataloged in the U.S. Government catalog under NSN 5340-01-219-4482, 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
MD31623-3423
NSN: 5340-01-219-4482
FSC: 5340 — Hardware, Commercial
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
attachment_to_item_supported_methodHOLDS ITEM BY MEANS OF RETAINER 0.500 IN. DIA ON HEAD OF HOLDER IN
supporting_object/surface_attachment_methodONE MTG HOLE ON STEM END OF HOLDER 0.125 IN. DIA IN
NSN5340-01-219-4482
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MD31623-3423 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
•
SUPPORTING OBJECT/SURFACE ATTACHMENT METHOD: ONE MTG HOLE ON STEM END OF HOLDER 0.125 IN. DIA IN
•
ATTACHMENT TO ITEM SUPPORTED METHOD: HOLDS ITEM BY MEANS OF RETAINER 0.500 IN. DIA ON HEAD OF HOLDER IN
TECHNICAL CHARACTERISTICS
SUPPORTING OBJECT/SURFACE ATTACHMENT METHODONE MTG HOLE ON STEM END OF HOLDER 0.125 IN. DIA IN
ATTACHMENT TO ITEM SUPPORTED METHODHOLDS ITEM BY MEANS OF RETAINER 0.500 IN. DIA ON HEAD OF HOLDER IN
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
MD31623-3423A2Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MD31623-3423?
MD31623-3423 is a HOLDER,SPRING.
What parts can replace MD31623-3423?
There is 1 known substitute for MD31623-3423: MD31623-3423A2. Substitute compatibility should be verified for your specific system.
What is the NSN for MD31623-3423?
MD31623-3423 is cataloged in the U.S. Government catalog under NSN 5340-01-219-4482. This indicates validated use in U.S. government and defense supply chains.
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