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ADCH4 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

ADCH4: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: ALUMINUM, design_type: FRICTION, overall_diameter: 1.000 INCHES NOMINAL IN, special_features: 10 IN. LG BRASS BEAD CHAIN ATTACHED TO CAP IN, surface_treatment: ANODIZE, inside_diameter_length: 0.250 INCHES NOMINAL IN.

This part is cataloged in the U.S. Government catalog under NSN 5340-00-843-0744, 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
ADCH4
NSN: 5340-00-843-0744
FSC: 5340 — Hardware, Commercial
CAGE: 78357 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV QUICK COUPLER DIVISION (USA)
SPECIFICATIONS
materialALUMINUM
design_typeFRICTION
overall_diameter1.000 INCHES NOMINAL IN
special_features10 IN. LG BRASS BEAD CHAIN ATTACHED TO CAP IN
surface_treatmentANODIZE
inside_diameter_length0.250 INCHES NOMINAL IN
round_cap_outside_surface_conditionKNURLED
connector_nominal_thread_size_for_which_designed0.250 INCHES IN
NSN5340-00-843-0744
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: ADCH4 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
•
DESIGN TYPE: FRICTION
•
OVERALL DIAMETER: 1.000 INCHES NOMINAL IN
•
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED: 0.250 INCHES IN
•
SURFACE TREATMENT: ANODIZE
•
MATERIAL: ALUMINUM
•
INSIDE DIAMETER LENGTH: 0.250 INCHES NOMINAL IN
•
ROUND CAP OUTSIDE SURFACE CONDITION: KNURLED
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER1.000 INCHES NOMINAL IN
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED0.250 INCHES IN
SPECIAL FEATURES10 IN. LG BRASS BEAD CHAIN ATTACHED TO CAP IN
SURFACE TREATMENTANODIZE
MATERIALALUMINUM
INSIDE DIAMETER LENGTH0.250 INCHES NOMINAL IN
ROUND CAP OUTSIDE SURFACE CONDITIONKNURLED
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 3
21C2200-611Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
21C1711-21Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
SM-A-949408-3Same 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 ADCH4?
ADCH4 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace ADCH4?
There are 3 known substitutes for ADCH4: 21C2200-611, 21C1711-21, SM-A-949408-3. Substitute compatibility should be verified for your specific system.
What is the NSN for ADCH4?
ADCH4 is cataloged in the U.S. Government catalog under NSN 5340-00-843-0744. 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.