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Technical Data Sheet
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691-00018 — Technical Data Sheet

✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The CIRCUIT BREAKER is a the manufacturer industrial component. Key specifications include material: PLASTIC CASE, body_style: MULTIPOLE-MULTIPLE ACTUATOR TYPE, body_width: 2.250 INCHES NOMINAL IN, body_length: 2.500 INCHES NOMINAL IN, boss_height: 0.140 INCHES NOMINAL IN, reset_method: MANUAL. This part is cataloged in the Federal Logistics Information System under NSN 5331-00-166-0994, 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
MRO→ MRO_GENERAL→ 691-00018
NSN: 5331-00-166-0994
FSC: 5331 — O-RING
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialPLASTIC CASE
body_styleMULTIPOLE-MULTIPLE ACTUATOR TYPE
body_width2.250 INCHES NOMINAL IN
body_length2.500 INCHES NOMINAL IN
boss_height0.140 INCHES NOMINAL IN
reset_methodMANUAL
pole_quantity3
hardness_rating75.0 SHORE DUROMETER A NOMINAL
outside_diameter0.864 INCHES MINIMUM AND 0.894 INCHES MAXIMUM IN
actuator_functionTRIP-RESET
frequency_in_hertz60.0 ALL LOCATIONS
nominal_thread_size0.138 INCHES IN
NSN5331-00-166-0994
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 691-00018 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
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.730 INCHES MINIMUM AND 0.748 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.864 INCHES MINIMUM AND 0.894 INCHES MAXIMUM IN
•
HARDNESS RATING: 75.0 SHORE DUROMETER A NOMINAL
TECHNICAL CHARACTERISTICS
ELONGATION PERCENTAGE125 MAXIMUM
MATERIALRUBBER FLUOROCARBON CLASS FPM
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.730 INCHES MINIMUM AND 0.748 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.864 INCHES MINIMUM AND 0.894 INCHES MAXIMUM IN
HARDNESS RATING75.0 SHORE DUROMETER A NOMINAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
91624528InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
1355-115InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2-018V747-75InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
8018InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
127-189-018InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
GD00990186InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 691-00018?
691-00018 is a CIRCUIT BREAKER. It is classified as a MRO (MRO_GENERAL).
What parts can replace 691-00018?
There are 28 known substitutes for 691-00018: 91624528, 1355-115, 2-018V747-75 and 25 more. Substitute compatibility should be verified for your specific system.
Is 691-00018 still available?
691-00018 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026