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Technical Data Sheet
PartsTable / COMPONENT / 156401R1
156401R1 ✓ 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 RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: INTERNAL STEPPED, usage_design: EXTERNAL, inside_diameter: 5.156 INCHES NOMINAL IN, major_thickness: 0.055 INCHES NOMINAL IN, outside_diameter: 5.406 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-753-3748, 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
156401R1
NSN: 5325-00-753-3748
FSC: 5325
CAGE: 29510 — KOMATSU AMERICAN INTL CO (USA)
SPECIFICATIONS
materialSTEEL
ring_styleINTERNAL STEPPED
usage_designEXTERNAL
inside_diameter5.156 INCHES NOMINAL IN
major_thickness0.055 INCHES NOMINAL IN
outside_diameter5.406 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleRECTANGULAR
NSN5325-00-753-3748
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 156401R1 · 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
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MATERIAL: STEEL
•
USAGE DESIGN: EXTERNAL
•
OUTSIDE DIAMETER: 5.406 INCHES NOMINAL IN
•
RING STYLE: INTERNAL STEPPED
•
INSIDE DIAMETER: 5.156 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
MAJOR THICKNESS: 0.055 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIALSTEEL
USAGE DESIGNEXTERNAL
OUTSIDE DIAMETER5.406 INCHES NOMINAL IN
RING STYLEINTERNAL STEPPED
INSIDE DIAMETER5.156 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
MAJOR THICKNESS0.055 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
4756Interchangeable
interchangeable cross-reference
interchangeable
SCB91436Interchangeable
interchangeable cross-reference
interchangeable
827476Interchangeable
interchangeable cross-reference
interchangeable
995-10A7-50HM5PCTInterchangeable
interchangeable cross-reference
interchangeable
6520NCM071859Interchangeable
interchangeable cross-reference
interchangeable
90172Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 156401R1?
156401R1 is a RING,RETAINING.
What parts can replace 156401R1?
There are 9 known substitutes for 156401R1: 4756, SCB91436, 827476 and 6 more. Substitute compatibility should be verified for your specific system.
Is 156401R1 still available?
156401R1 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