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Technical Data Sheet
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138656 — CHAIN,BLOCK

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

138656: CHAIN,BLOCK.

The CHAIN,BLOCK is a the manufacturer industrial component. Key specifications include special_features: NO. 100 X 68, end_item_identification: SL6640 SKID STEER LOADER; WHEEL DRIVES.

This part is cataloged in the U.S. Government catalog under NSN 5340-01-304-0670, 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
138656
NSN: 5340-01-304-0670
NIINs: 013040670, 015857837
FSC: 5340 — Hardware, Commercial
CAGE: 10138 — ASTRONAUTICS CORPORATION OF AMERICA (USA)
SPECIFICATIONS
special_featuresNO. 100 X 68
end_item_identificationSL6640 SKID STEER LOADER; WHEEL DRIVES
NSN5340-01-304-0670
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 138656 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
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 138656?
138656 is a CHAIN,BLOCK.
What is the NSN for 138656?
138656 is cataloged in the U.S. Government catalog under NSN 5340-01-304-0670. This indicates validated use in U.S. government and defense supply chains.
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