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Technical Data Sheet
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B109721 — GASKET AND SEAL SET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

B109721: GASKET AND SEAL SET.

The GASKET AND SEAL SET is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5330-01-213-5205, 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
B109721
NSN: 5330-01-213-5205
NIINs: 012135205, 014725166
FSC: 5330 — Packing and Gasket Materials
CAGE: 5T400 — GRIMES AEROSPACE CO SUB OF ALLIEDSIGNAL INC (USA)
SPECIFICATIONS
Part NumberB109721
NSN5330-01-213-5205
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B109721 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
SUBSTITUTES & CROSS-REFERENCES 6
12284416Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
B-109830Reference document
Same NSN cross-reference
Reference document — Secondary reference
12286802Reference document
Same NSN cross-reference
Reference document — Replaced / superseded reference
3-300-039Reference document
Same NSN cross-reference
Reference document — Replaced / superseded reference
28-4404-201Reference document
Same NSN cross-reference
Reference document — Secondary reference
12284415Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B109721?
B109721 is a GASKET AND SEAL SET.
What parts can replace B109721?
There are 6 known substitutes for B109721: 12284416, B-109830, 12286802 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B109721?
B109721 is cataloged in the U.S. Government catalog under NSN 5330-01-213-5205. This indicates validated use in U.S. government and defense supply chains.
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