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Technical Data Sheet
PartsTable / COMPONENT / XSC138
XSC138 ✓ 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, end_style: 90 DEGREE PARALLEL, ring_style: STRAIGHT GAP, usage_design: EXTERNAL, inside_diameter: 0.950 INCHES NOMINAL IN, major_thickness: 0.078 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-559-3901, 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
XSC138
NSN: 5325-00-559-3901
FSC: 5325
CAGE: 20859 — MELLOWES CO DIV OF CHARTER MFG CO INC (USA)
SPECIFICATIONS
materialSTEEL
end_style90 DEGREE PARALLEL
ring_styleSTRAIGHT GAP
usage_designEXTERNAL
inside_diameter0.950 INCHES NOMINAL IN
major_thickness0.078 INCHES NOMINAL IN
outside_diameter1.106 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating46.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleRECTANGULAR
NSN5325-00-559-3901
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: XSC138 · 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
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
OUTSIDE DIAMETER: 1.106 INCHES NOMINAL IN
•
RING STYLE: STRAIGHT GAP
•
MATERIAL: STEEL
•
INSIDE DIAMETER: 0.950 INCHES NOMINAL IN
•
USAGE DESIGN: EXTERNAL
•
MAJOR THICKNESS: 0.078 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CASEHARDENING INDICATORNOT CASEHARDENED
OUTSIDE DIAMETER1.106 INCHES NOMINAL IN
RING STYLESTRAIGHT GAP
MATERIALSTEEL
INSIDE DIAMETER0.950 INCHES NOMINAL IN
USAGE DESIGNEXTERNAL
MAJOR THICKNESS0.078 INCHES NOMINAL IN
END STYLE90 DEGREE PARALLEL
MATERIAL HARDNESS RATING46.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
4019Interchangeable
interchangeable cross-reference
interchangeable
1515Interchangeable
interchangeable cross-reference
interchangeable
01845-1069Interchangeable
interchangeable cross-reference
interchangeable
2592AInterchangeable
interchangeable cross-reference
interchangeable
ME88-2Interchangeable
interchangeable cross-reference
interchangeable
BLUHI100000HMSInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is XSC138?
XSC138 is a RING,RETAINING.
What parts can replace XSC138?
There are 16 known substitutes for XSC138: 4019, 1515, 01845-1069 and 13 more. Substitute compatibility should be verified for your specific system.
Is XSC138 still available?
XSC138 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