PartsTable
Technical Data Sheet
26558 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, center_hole_diameter: 0.920 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN, cross-sectional_height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-144-3648, 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
26558
NSN: 5306-00-144-3648
FSC: 5306
CAGE: 99167 — HAMILTON SUNDSTRAND CORPORATION (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
center_hole_diameter0.920 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
NSN5306-00-144-3648
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 26558 · 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
THREAD LENGTH: 0.375 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN
THREAD DIRECTION: RIGHT-HAND
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER: 0.750 INCHES MINIMUM AND 0.781 INCHES MAXIMUM FIRST HOLE IN
THREAD QUANTITY PER INCH: 32
MINIMUM TENSILE STRENGTH: 125000 POUNDS PER SQUARE INCH LBS
THREAD SERIES DESIGNATOR: UNF
THREAD CLASS: 3A A
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.375 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD DIAMETER0.190 INCHES IN
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER0.750 INCHES MINIMUM AND 0.781 INCHES MAXIMUM FIRST HOLE IN
THREAD QUANTITY PER INCH32
MINIMUM TENSILE STRENGTH125000 POUNDS PER SQUARE INCH LBS
THREAD SERIES DESIGNATORUNF
THREAD CLASS3A A
HEAD HEIGHT0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
MATERIALSTEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4130 OR STEEL COMP 4037 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
47753-1Upgraded Successor
successor cross-reference
successor
400054Upgraded Successor
successor cross-reference
successor
R337PC44Interchangeable
interchangeable cross-reference
interchangeable
R107PC44Interchangeable
interchangeable cross-reference
interchangeable
A476Interchangeable
interchangeable cross-reference
interchangeable
26558Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 26558?
26558 is a O-RING.
What parts can replace 26558?
There are 19 known substitutes for 26558: 47753-1, 400054, R337PC44 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 26558?
26558 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-144-3648. This indicates validated use in U.S. government and defense supply chains.
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