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Technical Data Sheet
PartsTable / COMPONENT / MIL-R-27426
MIL-R-27426 ✓ 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: SPECIAL FLAT, usage_design: INTERNAL, inside_diameter: 2.375 INCHES NOMINAL IN, major_thickness: 0.049 INCHES NOMINAL IN, outside_diameter: 2.476 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-200-5217, 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
MIL-R-27426
NSN: 5325-00-200-5217
FSC: 5325
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL
ring_styleSPECIAL FLAT
usage_designINTERNAL
inside_diameter2.375 INCHES NOMINAL IN
major_thickness0.049 INCHES NOMINAL IN
outside_diameter2.476 INCHES NOMINAL IN
surface_treatmentCADMIUM
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating40.0 ROCKWELL C MINIMUM AND 51.5 ROCKWELL C MAXIMUM
cross-sectional_shape_styleDOUBLE OVAL
NSN5325-00-200-5217
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MIL-R-27426 · 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
•
USAGE DESIGN: INTERNAL
•
OUTSIDE DIAMETER: 5.436 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: DOUBLE OVAL
•
MATERIAL: STEEL
•
SURFACE TREATMENT: CADMIUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE 1070 TO 1090 ASSN STD SINGLE MATERIAL RESPONSE
•
INSIDE DIAMETER: 4.936 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
USAGE DESIGNINTERNAL
OUTSIDE DIAMETER5.436 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEDOUBLE OVAL
MATERIALSTEEL
SURFACE TREATMENTCADMIUM
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 1070 TO 1090 ASSN STD SINGLE MATERIAL RESPONSE
INSIDE DIAMETER4.936 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESPECIAL FLAT
MAJOR THICKNESS0.074 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
HS3014RR525CInterchangeable
interchangeable cross-reference
interchangeable
RR-525CInterchangeable
interchangeable cross-reference
interchangeable
M27426-3215BInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-R-27426?
MIL-R-27426 is a RING,RETAINING.
What parts can replace MIL-R-27426?
There are 3 known substitutes for MIL-R-27426: HS3014RR525C, RR-525C, M27426-3215B. Substitute compatibility should be verified for your specific system.
Is MIL-R-27426 still available?
MIL-R-27426 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