PartsTable
Technical Data Sheet
Download PDF

C749-145 — MOUNT,RESILIENT,UTILITY

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

C749-145: MOUNT,RESILIENT,UTILITY.

The MOUNT,RESILIENT,UTILITY is a the manufacturer industrial component. Key specifications include height: 3.250 INCHES NOMINAL IN, thread_size: 1/2-13 ALL THREADED PORTIONS, flange_width: 4.800 INCHES NOMINAL IN, flange_length: 4.800 INCHES NOMINAL IN, flange_thickness: 0.250 INCHES NOMINAL IN, special_features: METAL PARTS LOW CARBON STEEL,CAD PLATED,ELASTOMER-WIDE TEMP RANGE.STATICSHEAR SPRING RATE-150 LBS.PER INCH. LBS.

This part is cataloged in the U.S. Government catalog under NSN 5340-01-618-3046, 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
C749-145
NSN: 5340-01-618-3046
FSC: 5340 — Hardware, Commercial
CAGE: 71985 — DOW-ELCO, INC. (USA)
SPECIFICATIONS
height3.250 INCHES NOMINAL IN
thread_size1/2-13 ALL THREADED PORTIONS
flange_width4.800 INCHES NOMINAL IN
flange_length4.800 INCHES NOMINAL IN
flange_thickness0.250 INCHES NOMINAL IN
special_featuresMETAL PARTS LOW CARBON STEEL,CAD PLATED,ELASTOMER-WIDE TEMP RANGE.STATICSHEAR SPRING RATE-150 LBS.PER INCH. LBS
style_designatorROUND FOUR-HOLE FLANGE
distance_between_mounting_hole_centers3.750 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencySHEAR MOUNT
shortest_distance_between_mounting_hole_centers3.750 INCHES NOMINAL IN
NSN5340-01-618-3046
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: C749-145 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
•
DISTANCE BETWEEN MOUNTING HOLE CENTERS: 3.750 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: ROUND FOUR-HOLE FLANGE
•
FLANGE LENGTH: 4.800 INCHES NOMINAL IN
•
SHORTEST DISTANCE BETWEEN MOUNTING HOLE CENTERS: 3.750 INCHES NOMINAL IN
•
HEIGHT: 3.250 INCHES NOMINAL IN
•
THREAD SIZE: 1/2-13 ALL THREADED PORTIONS
TECHNICAL CHARACTERISTICS
DISTANCE BETWEEN MOUNTING HOLE CENTERS3.750 INCHES NOMINAL IN
FLANGE THICKNESS0.250 INCHES NOMINAL IN
STYLE DESIGNATORROUND FOUR-HOLE FLANGE
FLANGE LENGTH4.800 INCHES NOMINAL IN
SHORTEST DISTANCE BETWEEN MOUNTING HOLE CENTERS3.750 INCHES NOMINAL IN
HEIGHT3.250 INCHES NOMINAL IN
THREAD SIZE1/2-13 ALL THREADED PORTIONS
SPECIAL FEATURESMETAL PARTS LOW CARBON STEEL,CAD PLATED,ELASTOMER-WIDE TEMP RANGE.STATICSHEAR SPRING RATE-150 LBS.PER INCH. LBS
FLANGE WIDTH4.800 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYSHEAR MOUNT
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
No demilitarization required
Ready to buy C749-145?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is C749-145?
C749-145 is a MOUNT,RESILIENT,UTILITY.
What is the NSN for C749-145?
C749-145 is cataloged in the U.S. Government catalog under NSN 5340-01-618-3046. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — C749-145

✓ 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.