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639AS1243 — CAP-PLUG,PROTECTIVE,DUST AND MOI

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

639AS1243: CAP-PLUG,PROTECTIVE,DUST AND MOI.

CAP-PLUG,PROTECTIVE,DUST AND MOI. Key specifications include material: ALUMINUM ALLOY 6061 OR ALUMINUM ALLOY 6062, length_under_shoulder: 5.070 INCHES NOMINAL IN, open_end_inside_diameter: 4.500 INCHES NOMINAL IN, closed_end_overall_diameter: 6.970 INCHES MINIMUM AND 7.000 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-245-4252, 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
639AS1243
NSN: 5340-01-245-4252
FSC: 5340 — Hardware, Commercial
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OR ALUMINUM ALLOY 6062
length_under_shoulder5.070 INCHES NOMINAL IN
open_end_inside_diameter4.500 INCHES NOMINAL IN
closed_end_overall_diameter6.970 INCHES MINIMUM AND 7.000 INCHES MAXIMUM IN
NSN5340-01-245-4252
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 639AS1243 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
•
CLOSED END OVERALL DIAMETER: 6.970 INCHES MINIMUM AND 7.000 INCHES MAXIMUM IN
•
LENGTH UNDER SHOULDER: 5.070 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/8, ALLOY 6061-T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/8, T651 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-200/8, T6 FED SPEC 3RD MATERIAL RESPONSE OR QQ-A-200/8, T6510 FED SPEC 4TH MATERIAL RESPONSE OR QQ-A-200/8, T6511 FED SPEC 5TH MATERIAL RESPONSE
•
OPEN END INSIDE DIAMETER: 4.500 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY 6061 OR ALUMINUM ALLOY 6062
TECHNICAL CHARACTERISTICS
CLOSED END OVERALL DIAMETER6.970 INCHES MINIMUM AND 7.000 INCHES MAXIMUM IN
LENGTH UNDER SHOULDER5.070 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/8, ALLOY 6061-T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/8, T651 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-200/8, T6 FED SPEC 3RD MATERIAL RESPONSE OR QQ-A-200/8, T6510 FED SPEC 4TH MATERIAL RESPONSE OR QQ-A-200/8, T6511 FED SPEC 5TH MATERIAL RESPONSE
SPECIAL FEATURES3 HOLES 0.1246 IN. MIN AND 0.1248 IN. MAX DIA EQUALLY SPACED ON 6.570 IN. DIA; 3 HOLES 0.278 IN. MIN AND 0.289 IN. MAX DIA EQUALLY SPACED ON 5.530 IN. DIA; 2 HOLES 0.159 IN. MIN AND 0.164 IN. MAX DIA CENTERED 0.531 IN. FROM CENTER LINE; 1 HOLE 0.1870 IN. MIN AND 0.1873 IN. MAX DIA LOCATED 1.362 FROM CENTER LINE; 1 HOLE 0.091 IN. MIN AND 0.098 IN. MAX DIA LOCATED 1.500 FROM CENTER; 4 PINS INCLUDED IN
OPEN END INSIDE DIAMETER4.500 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY 6061 OR ALUMINUM ALLOY 6062
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 639AS1243?
639AS1243 is a CAP-PLUG,PROTECTIVE,DUST AND MOI.
What is the NSN for 639AS1243?
639AS1243 is cataloged in the U.S. Government catalog under NSN 5340-01-245-4252. This indicates validated use in U.S. government and defense supply chains.
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