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18A1688 — CLAMP,LOOP

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

18A1688: CLAMP,LOOP.

The CLAMP,LOOP is a the manufacturer industrial component. Key specifications include diameter: 0.406 INCHES NOMINAL IN, style_designator: CENTER MOUNT, tongue_hole_type: ROUND, UNTHREADED, loop_inside_diameter: 1.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-214-4967, 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
18A1688
NSN: 5340-01-214-4967
FSC: 5340 — Hardware, Commercial
CAGE: 2Y614 — LINK-BELT CRANES, L.P., LLLP (USA)
SPECIFICATIONS
diameter0.406 INCHES NOMINAL IN
style_designatorCENTER MOUNT
tongue_hole_typeROUND, UNTHREADED
loop_inside_diameter1.750 INCHES NOMINAL IN
NSN5340-01-214-4967
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 18A1688 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
•
STYLE DESIGNATOR: CENTER MOUNT
•
DIAMETER: 0.406 INCHES NOMINAL IN
•
TONGUE HOLE TYPE: ROUND, UNTHREADED
•
LOOP INSIDE DIAMETER: 1.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORCENTER MOUNT
DIAMETER0.406 INCHES NOMINAL IN
TONGUE HOLE TYPEROUND, UNTHREADED
LOOP INSIDE DIAMETER1.750 INCHES NOMINAL 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 18A1688?
18A1688 is a CLAMP,LOOP.
What is the NSN for 18A1688?
18A1688 is cataloged in the U.S. Government catalog under NSN 5340-01-214-4967. 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.