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HN3817 — SHIELD,EXPANSION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

HN3817: SHIELD,EXPANSION.

The SHIELD,EXPANSION is a the manufacturer industrial component. Key specifications include material: STEEL, head_style: HEXAGON EXTENDED WASHER, fastener_type: BOLT, nominal_length: 1.875 INCHES IN, style_designator: SINGLE EXPANSION MACHINE SCREW, thread_provision: THREADED. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-498-1740, 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
HN3817
NSN: 5340-01-498-1740
FSC: 5340 — Hardware, Commercial
CAGE: 30323 — ILLINOIS TOOL WORKS INC (USA)
SPECIFICATIONS
materialSTEEL
head_styleHEXAGON EXTENDED WASHER
fastener_typeBOLT
nominal_length1.875 INCHES IN
style_designatorSINGLE EXPANSION MACHINE SCREW
thread_provisionTHREADED
features_providedCLOSED END
insert_type_for_which_designedMACHINE BOLT
NSN5340-01-498-1740
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: HN3817 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
•
THREAD PROVISION: THREADED
•
NOMINAL LENGTH: 1.875 INCHES IN
•
STYLE DESIGNATOR: SINGLE EXPANSION MACHINE SCREW
•
FASTENER TYPE: BOLT
•
FEATURES PROVIDED: CLOSED END
•
INSERT TYPE FOR WHICH DESIGNED: MACHINE BOLT
•
HEAD STYLE: HEXAGON EXTENDED WASHER
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
THREAD PROVISIONTHREADED
NOMINAL LENGTH1.875 INCHES IN
STYLE DESIGNATORSINGLE EXPANSION MACHINE SCREW
FASTENER TYPEBOLT
FEATURES PROVIDEDCLOSED END
INSERT TYPE FOR WHICH DESIGNEDMACHINE BOLT
HEAD STYLEHEXAGON EXTENDED WASHER
MATERIALSTEEL
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HN3817?
HN3817 is a SHIELD,EXPANSION.
What is the NSN for HN3817?
HN3817 is cataloged in the U.S. Government catalog under NSN 5340-01-498-1740. 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.