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1661-D PC7 — 1661-D PC7

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1661-D PC7: 1661-D PC7.

The 1661-D PC7 is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5340-01-456-0797, 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
1661-D PC7
NSN: 5340-01-456-0797
FSC: 5340 — Hardware, Commercial
CAGE: 75545 — LAWLER MANUFACTURING COMPANY, INC. (USA)
SPECIFICATIONS
Part Number1661-D PC7
NSN5340-01-456-0797
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1661-D PC7 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
•
LENGTH: 2.4687 INCHES NOMINAL IN
•
THREAD LENGTH: 0.3125 INCHES NOMINAL LEFT EXTERNAL IN
•
STYLE DESIGNATOR: LEFT INTERNAL AND RIGHT EXTERNAL THREAD
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
DIAMETER: 0.3750 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND RIGHT INTERNAL
TECHNICAL CHARACTERISTICS
LENGTH2.4687 INCHES NOMINAL IN
THREAD LENGTH0.3125 INCHES NOMINAL LEFT EXTERNAL IN
THREAD LENGTH1.5000 INCHES NOMINAL RIGHT INTERNAL IN
STYLE DESIGNATORLEFT INTERNAL AND RIGHT EXTERNAL THREAD
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
DIAMETER0.3750 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND RIGHT INTERNAL
THREAD DIRECTIONRIGHT-HAND LEFT EXTERNAL
NOMINAL THREAD SIZE0.2500 INCHES LEFT EXTERNAL IN
NOMINAL THREAD SIZE0.2500 INCHES RIGHT INTERNAL IN
SUBSTITUTES & CROSS-REFERENCES 2
1486Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
1661-D PART 1661-D-7Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 1661-D PC7?
1661-D PC7 is a 1661-D PC7.
What parts can replace 1661-D PC7?
There are 2 known substitutes for 1661-D PC7: 1486, 1661-D PART 1661-D-7. Substitute compatibility should be verified for your specific system.
What is the NSN for 1661-D PC7?
1661-D PC7 is cataloged in the U.S. Government catalog under NSN 5340-01-456-0797. 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.