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Technical Data Sheet
PartsTable / COMPONENT / H2939
H2939 ✓ 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: VERTEX OUTSIDE PERIPHERY, ring_style: STRAIGHT GAP, usage_design: EXTERNAL, inside_diameter: 2.250 INCHES MINIMUM AND 2.281 INCHES MAXIMUM IN, major_thickness: 0.123 INCHES MINIMUM AND 0.127 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 5325-00-282-4977, 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
H2939
NSN: 5325-00-282-4977
FSC: 5325
CAGE: 35311 — AMERICAN STANDARD INC WESTINGHOUSE AIR BRAKE CO DIV (USA)
SPECIFICATIONS
materialSTEEL
end_styleVERTEX OUTSIDE PERIPHERY
ring_styleSTRAIGHT GAP
usage_designEXTERNAL
inside_diameter2.250 INCHES MINIMUM AND 2.281 INCHES MAXIMUM IN
major_thickness0.123 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN
outside_diameter2.688 INCHES MINIMUM AND 2.719 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating44.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleROUNDED INSIDE CORNERS
NSN5325-00-282-4977
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: H2939 · 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: 2.250 INCHES MINIMUM AND 2.281 INCHES MAXIMUM IN
•
MATERIAL: STEEL
•
CROSS-SECTIONAL SHAPE STYLE: ROUNDED INSIDE CORNERS
•
MAJOR THICKNESS: 0.123 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 2.688 INCHES MINIMUM AND 2.719 INCHES MAXIMUM IN
•
MATERIAL HARDNESS RATING: 44.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
•
END STYLE: VERTEX OUTSIDE PERIPHERY
•
RING STYLE: STRAIGHT GAP
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER2.250 INCHES MINIMUM AND 2.281 INCHES MAXIMUM IN
MATERIALSTEEL
CROSS-SECTIONAL SHAPE STYLEROUNDED INSIDE CORNERS
MAJOR THICKNESS0.123 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN
OUTSIDE DIAMETER2.688 INCHES MINIMUM AND 2.719 INCHES MAXIMUM IN
MATERIAL HARDNESS RATING44.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
END STYLEVERTEX OUTSIDE PERIPHERY
RING STYLESTRAIGHT GAP
USAGE DESIGNEXTERNAL
CASEHARDENING INDICATORNOT CASEHARDENED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
TURCO 5873Interchangeable
interchangeable cross-reference
interchangeable
5873Interchangeable
interchangeable cross-reference
interchangeable
D600B00207Interchangeable
interchangeable cross-reference
interchangeable
09-5873Interchangeable
interchangeable cross-reference
interchangeable
005873Interchangeable
interchangeable cross-reference
interchangeable
B07A312AC3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H2939?
H2939 is a RING,RETAINING.
What parts can replace H2939?
There are 22 known substitutes for H2939: TURCO 5873, 5873, D600B00207 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H2939?
H2939 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-282-4977. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026