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NR-37 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

NR-37: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include special_features: FOR FF, FH AND FS SERIES COUPLERS, part_name_assigned_by_controlling_agency: DUST CAP 3/8. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-366-3341, 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
NR-37
NSN: 5340-01-366-3341
FSC: 5340 — Hardware, Commercial
CAGE: 97111 — PARKER-HANNIFIN CORPORATION DIV QUICK COUPLING DIVISION (USA)
SPECIFICATIONS
special_featuresFOR FF, FH AND FS SERIES COUPLERS
part_name_assigned_by_controlling_agencyDUST CAP 3/8
NSN5340-01-366-3341
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: NR-37 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESFOR FF, FH AND FS SERIES COUPLERS
PART NAME ASSIGNED BY CONTROLLING AGENCYDUST CAP 3/8
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 1
3367277Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is NR-37?
NR-37 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace NR-37?
There is 1 known substitute for NR-37: 3367277. Substitute compatibility should be verified for your specific system.
What is the NSN for NR-37?
NR-37 is cataloged in the U.S. Government catalog under NSN 5340-01-366-3341. 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.