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Technical Data Sheet
PartsTable / COMPONENT / 3127540
3127540 ✓ 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 ring_style: INTERNAL, usage_design: INTERNAL, major_thickness: 1.6 MILLIMETERS NOMINAL MM, outside_diameter: 53.3 MILLIMETERS MINIMUM MM, casehardening_indicator: CASEHARDENED, cross-sectional_shape_style: RECTANGULAR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-01-255-5404, 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
3127540
NSN: 5325-01-255-5404
FSC: 5325
CAGE: F1600 — FENWICK-LINDE (FRA)
SPECIFICATIONS
ring_styleINTERNAL
usage_designINTERNAL
major_thickness1.6 MILLIMETERS NOMINAL MM
outside_diameter53.3 MILLIMETERS MINIMUM MM
casehardening_indicatorCASEHARDENED
cross-sectional_shape_styleRECTANGULAR
NSN5325-01-255-5404
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3127540 · 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
•
CASEHARDENING INDICATOR: CASEHARDENED
•
OUTSIDE DIAMETER: 53.3 MILLIMETERS MINIMUM MM
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
RING STYLE: INTERNAL
•
USAGE DESIGN: INTERNAL
•
MAJOR THICKNESS: 1.6 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS (FLIS)
CASEHARDENING INDICATORCASEHARDENED
OUTSIDE DIAMETER53.3 MILLIMETERS MINIMUM MM
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
RING STYLEINTERNAL
USAGE DESIGNINTERNAL
MAJOR THICKNESS1.6 MILLIMETERS NOMINAL MM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
5100156Interchangeable
interchangeable cross-reference
interchangeable
5100-156-S-MDInterchangeable
interchangeable cross-reference
interchangeable
3100-156Interchangeable
interchangeable cross-reference
interchangeable
5365008037304Interchangeable
interchangeable cross-reference
interchangeable
H-5539Interchangeable
interchangeable cross-reference
interchangeable
W2-009 REV O ITEM 44Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3127540?
3127540 is a RING,RETAINING.
What parts can replace 3127540?
There are 7 known substitutes for 3127540: 5100156, 5100-156-S-MD, 3100-156 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3127540?
3127540 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-01-255-5404. 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