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740-0561 — SPECTACLE FRAME ULTRA THIN

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

740-0561: SPECTACLE FRAME ULTRA THIN.

The SPECTACLE FRAME ULTRA THIN is a the manufacturer industrial component. Key specifications include end_item_identification: 4240-01-630-8327, part_name_assigned_by_controlling_agency: FRAME,SPECTACLE. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-756-2717, 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
740-0561
NSN: 5340-00-756-2717
NIINs: 007562717, 016793323
FSC: 5340 — Hardware, Commercial
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
end_item_identification4240-01-630-8327
part_name_assigned_by_controlling_agencyFRAME,SPECTACLE
NSN5340-00-756-2717
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 740-0561 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
•
BOLT CIRCLE HOLE QUANTITY: 3
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
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CROSS-SECTIONAL SHAPE STYLE: FLAT
•
OUTSIDE DIAMETER: 3.500 INCHES NOMINAL IN
•
SECURING DEVICE TYPE: THREADED FASTENER
•
BOLT CIRCLE DIAMETER: 2.500 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND, MULTI HOLES
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
BOLT CIRCLE HOLE QUANTITY3
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
CROSS-SECTIONAL SHAPE STYLEFLAT
OUTSIDE DIAMETER3.500 INCHES NOMINAL IN
SECURING DEVICE TYPETHREADED FASTENER
BOLT CIRCLE DIAMETER2.500 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND, MULTI HOLES
MATERIALSTEEL
HOLE DIAMETER0.406 INCHES NOMINAL IN
BODY THICKNESS0.500 INCHES NOMINAL IN
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 740-0561?
740-0561 is a SPECTACLE FRAME ULTRA THIN.
What is the NSN for 740-0561?
740-0561 is cataloged in the U.S. Government catalog under NSN 5340-00-756-2717. 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.