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Technical Data Sheet
PartsTable / COMPONENT / 018957
018957 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SEMICONDUCTOR DEVICE,DIODE is a the manufacturer industrial component. Key specifications include material: SILICON SEMICONDUCTOR, ring_style: HOOKED, usage_design: INTERNAL, inside_diameter: 3.7034 INCHES NOMINAL IN, outside_diameter: 4.000 INCHES NOMINAL IN, features_provided: HERMETICALLY SEALED CASE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-378-9138, 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
018957
NSN: 5325-00-378-9138
FSC: 5325
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSILICON SEMICONDUCTOR
ring_styleHOOKED
usage_designINTERNAL
inside_diameter3.7034 INCHES NOMINAL IN
outside_diameter4.000 INCHES NOMINAL IN
features_providedHERMETICALLY SEALED CASE
material_diameter0.1483 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleROUND
NSN5325-00-378-9138
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 018957 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
RING STYLE: HOOKED
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
INSIDE DIAMETER: 3.7034 INCHES NOMINAL IN
•
MATERIAL: STEEL
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
OUTSIDE DIAMETER: 4.000 INCHES NOMINAL IN
•
USAGE DESIGN: INTERNAL
•
MATERIAL DIAMETER: 0.1483 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
RING STYLEHOOKED
CASEHARDENING INDICATORNOT CASEHARDENED
INSIDE DIAMETER3.7034 INCHES NOMINAL IN
MATERIALSTEEL
CROSS-SECTIONAL SHAPE STYLEROUND
OUTSIDE DIAMETER4.000 INCHES NOMINAL IN
USAGE DESIGNINTERNAL
MATERIAL DIAMETER0.1483 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
018957Interchangeable
interchangeable cross-reference
interchangeable
148B6203G21Interchangeable
interchangeable cross-reference
interchangeable
189-57Interchangeable
interchangeable cross-reference
interchangeable
986287-1BInterchangeable
interchangeable cross-reference
interchangeable
862112Interchangeable
interchangeable cross-reference
interchangeable
B91-1335A-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 018957?
018957 is a SEMICONDUCTOR DEVICE,DIODE.
What parts can replace 018957?
There are 6 known substitutes for 018957: 018957, 148B6203G21, 189-57 and 3 more. Substitute compatibility should be verified for your specific system.
Is 018957 still available?
018957 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: July 2026