PartsTable
Technical Data Sheet
Download PDF

56821-7 — STRAP,RETAINING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

56821-7: STRAP,RETAINING.

The STRAP,RETAINING is a the manufacturer industrial component. Key specifications include material: RUBBER, center_hole_diameter: 1.171 INCHES NOMINAL IN, cross-sectional_height: 0.139 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-206-6122, 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
56821-7
NSN: 5331-01-206-6122
NIINs: 012066122, 014216057
FSC: 5331 — O-ring
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialRUBBER
center_hole_diameter1.171 INCHES NOMINAL IN
cross-sectional_height0.139 INCHES NOMINAL IN
NSN5331-01-206-6122
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 56821-7 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
•
CROSS-SECTIONAL HEIGHT: 0.139 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 1.171 INCHES NOMINAL IN
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.139 INCHES NOMINAL IN
CENTER HOLE DIAMETER1.171 INCHES NOMINAL IN
MATERIALRUBBER
SUBSTITUTES & CROSS-REFERENCES 5
ARP568-217Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS568-217Reference document
Same NSN cross-reference
Reference document — Secondary reference
ASTM D2000 2A815A13F17EA14Reference document
Same NSN cross-reference
Reference document — Secondary reference
9458-43F116Reference document
Same NSN cross-reference
Reference document — Secondary reference
SAE AS568Reference 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 56821-7?
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 56821-7?
56821-7 is a STRAP,RETAINING.
What parts can replace 56821-7?
There are 5 known substitutes for 56821-7: ARP568-217, AS568-217, ASTM D2000 2A815A13F17EA14 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 56821-7?
56821-7 is cataloged in the U.S. Government catalog under NSN 5331-01-206-6122. 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 — 56821-7

✓ 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.