PartsTable
Technical Data Sheet
Download PDF

H44518-8-8 — BACK-UP RING,PREFORMED PACKING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

H44518-8-8: BACK-UP RING,PREFORMED PACKING.

The BACK-UP RING,PREFORMED PACKING is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5330-01-170-6297, 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
H44518-8-8
NSN: 5330-01-170-6297
NIINs: 011706297, 015264759
FSC: 5330 — Packing and Gasket Materials
CAGE: 0EYA6 — DEFENSE MARITIME SOLUTIONS, INC. (USA)
SPECIFICATIONS
Part NumberH44518-8-8
NSN5330-01-170-6297
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: H44518-8-8 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 4
US-44518 ITEM 47Reference document
Same NSN cross-reference
Reference document — Secondary reference
CM-10387500Reference document
Same NSN cross-reference
Reference document — Secondary reference
5330PL0776650Reference document
Same NSN cross-reference
Reference document — Informative reference only
CM-1038Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy H44518-8-8?
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 H44518-8-8?
H44518-8-8 is a BACK-UP RING,PREFORMED PACKING.
What parts can replace H44518-8-8?
There are 4 known substitutes for H44518-8-8: US-44518 ITEM 47, CM-10387500, 5330PL0776650 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H44518-8-8?
H44518-8-8 is cataloged in the U.S. Government catalog under NSN 5330-01-170-6297. 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 — H44518-8-8

✓ 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.