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Technical Data Sheet
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7643-2 ✓ 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 MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: SLEEVE, body_width: 0.220 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN, nut_length: 0.656 INCHES NOMINAL IN, body_height: 0.140 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN, body_length: 0.960 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-367-4734, 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
7643-2
NSN: 5330-00-367-4734
FSC: 5330
CAGE: 71995 — DRESSER INDUSTRIES INC WAUKESHA ENGINE DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSLEEVE
body_width0.220 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
nut_length0.656 INCHES NOMINAL IN
body_height0.140 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN
body_length0.960 INCHES MAXIMUM IN
nut_diameter1.250 INCHES NOMINAL IN
thread_class2B
thread_seriesUNEF
flange_diameter1.643 INCHES NOMINAL IN
memory_capacityUNKNOWN
flange_thickness0.075 INCHES NOMINAL IN
NSN5330-00-367-4734
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 7643-2 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
RF-03284AInterchangeable
interchangeable cross-reference
interchangeable
578R315H06Interchangeable
interchangeable cross-reference
interchangeable
17603Interchangeable
interchangeable cross-reference
interchangeable
695686-1Interchangeable
interchangeable cross-reference
interchangeable
76432Interchangeable
interchangeable cross-reference
interchangeable
3028832-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7643-2?
7643-2 is a MICROCIRCUIT,DIGITAL.
What parts can replace 7643-2?
There are 15 known substitutes for 7643-2: RF-03284A, 578R315H06, 17603 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7643-2?
7643-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-367-4734. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026