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5108-100MD — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

5108-100MD: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: EXTERNAL INVERTED LUGS, usage_design: EXTERNAL, inside_diameter: 0.925 INCHES NOMINAL IN, major_thickness: 0.042 INCHES NOMINAL IN, surface_treatment: CADMIUM. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-281-9885, 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
5108-100MD
NSN: 5325-00-281-9885
FSC: 5325 — Fastening Devices
CAGE: 79136 — TRUARC COMPANY LLC DBA WALDES TRUARC (USA)
SPECIFICATIONS
materialSTEEL
ring_styleEXTERNAL INVERTED LUGS
usage_designEXTERNAL
inside_diameter0.925 INCHES NOMINAL IN
major_thickness0.042 INCHES NOMINAL IN
surface_treatmentCADMIUM
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 66,FS 1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
NSN5325-00-281-9885
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5108-100MD · 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
•
MATERIAL HARDNESS RATING: 47.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66,FS 1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MAJOR THICKNESS: 0.042 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.925 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: EXTERNAL INVERTED LUGS
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING47.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
USAGE DESIGNEXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66,FS 1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MAJOR THICKNESS0.042 INCHES NOMINAL IN
INSIDE DIAMETER0.925 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEEXTERNAL INVERTED LUGS
SURFACE TREATMENTCADMIUM
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 6
MS16626-1100Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
A-10978-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
4100-100-ST-CDReference document
Same NSN cross-reference
Reference document — Secondary reference
A10978-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
5018-100MDReference document
Same NSN cross-reference
Reference document — Secondary reference
5108-100-S-MDReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5108-100MD?
5108-100MD is a RING,RETAINING.
What parts can replace 5108-100MD?
There are 6 known substitutes for 5108-100MD: MS16626-1100, A-10978-1, 4100-100-ST-CD and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5108-100MD?
5108-100MD is cataloged in the U.S. Government catalog under NSN 5325-00-281-9885. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.