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MS16634-1018 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MS16634-1018: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: E BOWED, usage_design: EXTERNAL, end_play_takeup: 0.033 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN, inside_diameter: 0.142 INCHES MINIMUM AND 0.146 INCHES MAXIMUM IN, major_thickness: 0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-067-3836, 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
MS16634-1018
NSN: 5325-00-067-3836
FSC: 5325 — Fastening Devices
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL
ring_styleE BOWED
usage_designEXTERNAL
end_play_takeup0.033 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
inside_diameter0.142 INCHES MINIMUM AND 0.146 INCHES MAXIMUM IN
major_thickness0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating84.5 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 87.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationFED STD 66B AISI C1066 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
NSN5325-00-067-3836
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS16634-1018 · 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: 84.5 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 87.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66B AISI C1066 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
END PLAY TAKEUP: 0.033 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.142 INCHES MINIMUM AND 0.146 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING84.5 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 87.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
USAGE DESIGNEXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66B AISI C1066 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
END PLAY TAKEUP0.033 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN
MAJOR THICKNESS0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN
INSIDE DIAMETER0.142 INCHES MINIMUM AND 0.146 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEE BOWED
SURFACE TREATMENTCADMIUM AND CHROMATE
SUBSTITUTES & CROSS-REFERENCES 7
1001-18-SS2Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
5131-18-S-MDReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
1001-18Reference document
Same NSN cross-reference
Reference document — Secondary reference
12Z5036-48Reference document
Same NSN cross-reference
Reference document — Secondary reference
5131-18MDReference document
Same NSN cross-reference
Reference document — Secondary reference
1001-18-STReference document
Same NSN cross-reference
Reference document — Replaced / superseded 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 MS16634-1018?
MS16634-1018 is a RING,RETAINING.
What parts can replace MS16634-1018?
There are 7 known substitutes for MS16634-1018: 1001-18-SS2, 5131-18-S-MD, 1001-18 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS16634-1018?
MS16634-1018 is cataloged in the U.S. Government catalog under NSN 5325-00-067-3836. 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.