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Technical Data Sheet
PartsTable / COMPONENT / 5101-87-S-MD
5101-87-S-MD ✓ 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: EXTERNAL BOWED, usage_design: EXTERNAL, end_play_takeup: 0.020 INCHES MAXIMUM IN, inside_diameter: 0.810 INCHES NOMINAL IN, major_thickness: 0.042 INCHES NOMINAL 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 5325-00-778-2760, 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
5101-87-S-MD
NSN: 5325-00-778-2760
FSC: 5325
CAGE: 79136 — TRUARC COMPANY LLC DBA WALDES TRUARC (USA)
SPECIFICATIONS
materialSTEEL
ring_styleEXTERNAL BOWED
usage_designEXTERNAL
end_play_takeup0.020 INCHES MAXIMUM IN
inside_diameter0.810 INCHES NOMINAL IN
major_thickness0.042 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating47.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationFED STD NO. 66,AISI C1066 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
NSN5325-00-778-2760
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5101-87-S-MD · 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
•
END PLAY TAKEUP: 0.020 INCHES MAXIMUM IN
•
MATERIAL: STEEL
•
SURFACE TREATMENT: CADMIUM AND CHROMATE
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD NO. 66,AISI C1066 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MATERIAL HARDNESS RATING: 47.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
MAJOR THICKNESS: 0.042 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
END PLAY TAKEUP0.020 INCHES MAXIMUM IN
MATERIALSTEEL
SURFACE TREATMENTCADMIUM AND CHROMATE
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD NO. 66,AISI C1066 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIAL HARDNESS RATING47.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
USAGE DESIGNEXTERNAL
MAJOR THICKNESS0.042 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
INSIDE DIAMETER0.810 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
7218Interchangeable
interchangeable cross-reference
interchangeable
190ACInterchangeable
interchangeable cross-reference
interchangeable
2D8847Interchangeable
interchangeable cross-reference
interchangeable
3101-87-ST-CDInterchangeable
Same NIIN cross-reference
interchangeable
129622Interchangeable
Same NIIN cross-reference
interchangeable
5101-87MDInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5101-87-S-MD?
5101-87-S-MD is a RING,RETAINING.
What parts can replace 5101-87-S-MD?
There are 8 known substitutes for 5101-87-S-MD: 7218, 190AC, 2D8847 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5101-87-S-MD?
5101-87-S-MD is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-778-2760. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026