PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 03S63-79
03S63-79 ✓ 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: EXTERNAL, usage_design: EXTERNAL, inside_diameter: 0.281 INCHES NOMINAL IN, major_thickness: 0.025 INCHES NOMINAL IN, casehardening_indicator: NOT CASEHARDENED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-263-5954, 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
03S63-79
NSN: 5325-00-263-5954
FSC: 5325
CAGE: R1120 — SATAIR A/S (DNK)
SPECIFICATIONS
materialSTEEL
ring_styleEXTERNAL
usage_designEXTERNAL
inside_diameter0.281 INCHES NOMINAL IN
major_thickness0.025 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating69.5 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 73.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationFED STD 66 CLASS FS 1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
NSN5325-00-263-5954
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 03S63-79 · 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
•
RING STYLE: EXTERNAL
•
MAJOR THICKNESS: 0.025 INCHES NOMINAL IN
•
USAGE DESIGN: EXTERNAL
•
MATERIAL: STEEL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66 CLASS FS 1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
INSIDE DIAMETER: 0.281 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
RING STYLEEXTERNAL
MAJOR THICKNESS0.025 INCHES NOMINAL IN
USAGE DESIGNEXTERNAL
MATERIALSTEEL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66 CLASS FS 1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
CASEHARDENING INDICATORNOT CASEHARDENED
INSIDE DIAMETER0.281 INCHES NOMINAL IN
MATERIAL HARDNESS RATING69.5 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 73.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
103689Interchangeable
interchangeable cross-reference
interchangeable
751347-7Interchangeable
interchangeable cross-reference
interchangeable
TR68155Interchangeable
interchangeable cross-reference
interchangeable
82527Interchangeable
interchangeable cross-reference
interchangeable
53756BXInterchangeable
interchangeable cross-reference
interchangeable
450098Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 03S63-79?
03S63-79 is a RING,RETAINING.
What parts can replace 03S63-79?
There are 23 known substitutes for 03S63-79: 103689, 751347-7, TR68155 and 20 more. Substitute compatibility should be verified for your specific system.
Is 03S63-79 still available?
03S63-79 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