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Technical Data Sheet
PartsTable / COMPONENT / SK251-26
SK251-26 ✓ 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 COMP 6150, end_style: VERTEX OUTSIDE PERIPHERY, ring_style: STRAIGHT GAP, usage_design: EXTERNAL, inside_diameter: 1.480 INCHES NOMINAL IN, major_thickness: 0.092 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-281-6628, 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
SK251-26
NSN: 5325-00-281-6628
FSC: 5325
CAGE: 12603 — CLARK EQUIPMENT CO (USA)
SPECIFICATIONS
materialSTEEL COMP 6150
end_styleVERTEX OUTSIDE PERIPHERY
ring_styleSTRAIGHT GAP
usage_designEXTERNAL
inside_diameter1.480 INCHES NOMINAL IN
major_thickness0.092 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
outside_diameter1.855 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S624,6150 FED SPEC SINGLE MATERIAL RESPONSE
NSN5325-00-281-6628
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: SK251-26 · 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
•
INSIDE DIAMETER: 1.480 INCHES NOMINAL IN
•
END STYLE: VERTEX OUTSIDE PERIPHERY
•
MAJOR THICKNESS: 0.092 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 6150
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S624,6150 FED SPEC SINGLE MATERIAL RESPONSE
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
OUTSIDE DIAMETER: 1.855 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER1.480 INCHES NOMINAL IN
END STYLEVERTEX OUTSIDE PERIPHERY
MAJOR THICKNESS0.092 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
MATERIALSTEEL COMP 6150
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S624,6150 FED SPEC SINGLE MATERIAL RESPONSE
CASEHARDENING INDICATORNOT CASEHARDENED
OUTSIDE DIAMETER1.855 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
USAGE DESIGNEXTERNAL
MATERIAL HARDNESS RATING43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
201051Interchangeable
interchangeable cross-reference
interchangeable
B107.5Interchangeable
interchangeable cross-reference
interchangeable
19120Interchangeable
interchangeable cross-reference
interchangeable
B107.5M CL1STBInterchangeable
interchangeable cross-reference
interchangeable
5867677605Interchangeable
interchangeable cross-reference
interchangeable
SK67-7605Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SK251-26?
SK251-26 is a RING,RETAINING.
What parts can replace SK251-26?
There are 20 known substitutes for SK251-26: 201051, B107.5, 19120 and 17 more. Substitute compatibility should be verified for your specific system.
Is SK251-26 still available?
SK251-26 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