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Technical Data Sheet
PartsTable / COMPONENT / F721-30-B5-G2 P/N 16
F721-30-B5-G2 P/N 16 ✓ 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 F721-30-B5-G2 P/N 16 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-473-1736, 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
F721-30-B5-G2 P/N 16
NSN: 5330-01-473-1736
FSC: 5330
CAGE: 71041 — ALTRA INDUSTRIAL MOTION CORP. (USA)
SPECIFICATIONS
Part NumberF721-30-B5-G2 P/N 16
NSN5330-01-473-1736
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: F721-30-B5-G2 P/N 16 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
•
ACCOMMODATED SHAFT DIAMETER: 0.813 INCHES NOMINAL IN
•
SEAL WIDTH: 0.313 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
SEALING ELEMENT STYLE: ANGULAR
•
HOUSING BORE DIAMETER: 1.750 INCHES NOMINAL IN
•
MATERIAL: STEEL CASE
TECHNICAL CHARACTERISTICS (FLIS)
ACCOMMODATED SHAFT DIAMETER0.813 INCHES NOMINAL IN
SEAL WIDTH0.313 INCHES NOMINAL IN
CASE STYLESQUARE
END ITEM IDENTIFICATIONMODEL 721 SINGLE REDUCTION WORM GEAR SPEED REDUCER
SEALING ELEMENT STYLEANGULAR
PART NAME ASSIGNED BY CONTROLLING AGENCYINPUT OIL SEAL
HOUSING BORE DIAMETER1.750 INCHES NOMINAL IN
MATERIALSTEEL CASE
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
55336Interchangeable
interchangeable cross-reference
interchangeable
A1805J244Interchangeable
interchangeable cross-reference
interchangeable
N21009BInterchangeable
interchangeable cross-reference
interchangeable
472650Interchangeable
interchangeable cross-reference
interchangeable
471686Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is F721-30-B5-G2 P/N 16?
F721-30-B5-G2 P/N 16 is a F721-30-B5-G2 P/N 16.
What parts can replace F721-30-B5-G2 P/N 16?
There are 5 known substitutes for F721-30-B5-G2 P/N 16: 55336, A1805J244, N21009B and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for F721-30-B5-G2 P/N 16?
F721-30-B5-G2 P/N 16 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-473-1736. 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