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721617-326 — STANDOFF,THREADED,SPACING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

721617-326: STANDOFF,THREADED,SPACING.

The STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN, style_designator: LEFT INTERNAL AND RIGHT EXTERNAL THREAD, width_across_flats: 0.246 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN, cross-sectional_shape: HEXAGON, end_item_identification: A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE, specification/standard_data: 80205-NAS1829 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-210-8703, 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
721617-326
NSN: 5340-01-210-8703
FSC: 5340 — Hardware, Commercial
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
length0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
style_designatorLEFT INTERNAL AND RIGHT EXTERNAL THREAD
width_across_flats0.246 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN
cross-sectional_shapeHEXAGON
end_item_identificationA4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
specification/standard_data80205-NAS1829 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN5340-01-210-8703
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 721617-326 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
•
WIDTH ACROSS FLATS: 0.246 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN
•
LENGTH: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: LEFT INTERNAL AND RIGHT EXTERNAL THREAD
•
SPECIFICATION/STANDARD DATA: 80205-NAS1829 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
CROSS-SECTIONAL SHAPE: HEXAGON
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.246 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN
LENGTH0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
STYLE DESIGNATORLEFT INTERNAL AND RIGHT EXTERNAL THREAD
SPECIFICATION/STANDARD DATA80205-NAS1829 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
CROSS-SECTIONAL SHAPEHEXAGON
END ITEM IDENTIFICATIONA4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
SUBSTITUTES & CROSS-REFERENCES 3
4534-832-SS-0Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
NAS1829Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
9739SS0832-7Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 721617-326?
721617-326 is a STANDOFF,THREADED,SPACING.
What parts can replace 721617-326?
There are 3 known substitutes for 721617-326: 4534-832-SS-0, NAS1829, 9739SS0832-7. Substitute compatibility should be verified for your specific system.
What is the NSN for 721617-326?
721617-326 is cataloged in the U.S. Government catalog under NSN 5340-01-210-8703. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.