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Technical Data Sheet
74756 ✓ Verified by PartsTable
· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The FELT,MECHANICAL,PREFORMED is a the manufacturer industrial component. Key specifications include color: YELLOW OR GREEN, material: WOOL OVERALL, joint_type: BUTT ENDS, outside_diameter: 0.687 INCHES NOMINAL IN, special_features: QUICK READY TO USE TYPE, style_designator: CIRCULAR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-125-8117, 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
74756
NSN: 5330-00-125-8117
FSC: 5330
CAGE: 64959 — AMERICAN TELEPHONE AND TELEGRAPH CO (USA)
SPECIFICATIONS
colorYELLOW OR GREEN
materialWOOL OVERALL
joint_typeBUTT ENDS
outside_diameter0.687 INCHES NOMINAL IN
special_featuresQUICK READY TO USE TYPE
style_designatorCIRCULAR
aperture_diameter0.500 INCHES NOMINAL IN
lubrication_methodIMPREGNATED
fsc_application_dataTELETYPE AND FACSIMILE EQUIPMENT
cross-sectional_width0.187 INCHES NOMINAL IN
specific_usage_designFOR USE WITH ANAEROBIC ACRYLIC THREADLOCKING AND RETAINING COMPOUNDS
cross-sectional_height0.250 INCHES NOMINAL IN
NSN5330-00-125-8117
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 74756 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
MATERIAL: WOOL OVERALL
OUTSIDE DIAMETER: 0.687 INCHES NOMINAL IN
FSC APPLICATION DATA: TELETYPE AND FACSIMILE EQUIPMENT
STYLE DESIGNATOR: CIRCULAR
APERTURE DIAMETER: 0.500 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLE: SQUARE
LUBRICATION METHOD: IMPREGNATED
CROSS-SECTIONAL WIDTH: 0.187 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALWOOL OVERALL
OUTSIDE DIAMETER0.687 INCHES NOMINAL IN
FSC APPLICATION DATATELETYPE AND FACSIMILE EQUIPMENT
STYLE DESIGNATORCIRCULAR
APERTURE DIAMETER0.500 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESQUARE
LUBRICATION METHODIMPREGNATED
CROSS-SECTIONAL WIDTH0.187 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.250 INCHES NOMINAL IN
JOINT TYPEBUTT ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
INSTABOND PRIMERInterchangeable
interchangeable cross-reference
interchangeable
ASTM D5363 GRTInterchangeable
interchangeable cross-reference
interchangeable
85957500-20Interchangeable
interchangeable cross-reference
interchangeable
129573Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 74756?
74756 is a FELT,MECHANICAL,PREFORMED.
What parts can replace 74756?
There are 4 known substitutes for 74756: INSTABOND PRIMER, ASTM D5363 GRT, 85957500-20 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 74756?
74756 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-125-8117. This indicates validated use in U.S. government and defense supply chains.
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