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MS16628-1081 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MS16628-1081: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include ring_style: EXTERNAL BOWED, usage_design: EXTERNAL, end_play_takeup: 0.041 INCHES MAXIMUM IN, inside_diameter: 0.741 INCHES MINIMUM AND 0.756 INCHES MAXIMUM IN, major_thickness: 0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-287-9027, 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
MS16628-1081
NSN: 5325-01-287-9027
FSC: 5325 — Fastening Devices
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
ring_styleEXTERNAL BOWED
usage_designEXTERNAL
end_play_takeup0.041 INCHES MAXIMUM IN
inside_diameter0.741 INCHES MINIMUM AND 0.756 INCHES MAXIMUM IN
major_thickness0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
cross-sectional_shape_styleRECTANGULAR
NSN5325-01-287-9027
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS16628-1081 · 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: 66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66, COMP 1066 FED STD 1ST MATERIAL RESPONSE OR FED STD 66, COMP 1069 FED STD 2ND MATERIAL RESPONSE OR FED STD 66, COMP 1070 FED STD 3RD MATERIAL RESPONSE OR FED STD 66, COMP 1072 FED STD 4TH MATERIAL RESPONSE OR FED STD 66, COMP 1074 FED STD 5TH MATERIAL RESPONSE OR FED STD 66, COMP 1075 FED STD 6TH MATERIAL RESPONSE OR FED STD 66, COMP 1078 FED STD 7TH MATERIAL RESPONSE OR FED STD 66, COMP 1080 FED STD 8TH MATERIAL RESPONSE OR FED STD 66, COMP 1084 FED STD 9TH MATERIAL RESPONSE OR FED STD 66, COMP 1085 FED STD 10TH MATERIAL RESPONSE OR FED STD 66, COMP 1086 FED STD 11TH MATERIAL RESPONSE OR FED STD 66, COMP 1090 FED STD 12TH MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
END PLAY TAKEUP: 0.041 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.741 INCHES MINIMUM AND 0.756 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
USAGE DESIGNEXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66, COMP 1066 FED STD 1ST MATERIAL RESPONSE OR FED STD 66, COMP 1069 FED STD 2ND MATERIAL RESPONSE OR FED STD 66, COMP 1070 FED STD 3RD MATERIAL RESPONSE OR FED STD 66, COMP 1072 FED STD 4TH MATERIAL RESPONSE OR FED STD 66, COMP 1074 FED STD 5TH MATERIAL RESPONSE OR FED STD 66, COMP 1075 FED STD 6TH MATERIAL RESPONSE OR FED STD 66, COMP 1078 FED STD 7TH MATERIAL RESPONSE OR FED STD 66, COMP 1080 FED STD 8TH MATERIAL RESPONSE OR FED STD 66, COMP 1084 FED STD 9TH MATERIAL RESPONSE OR FED STD 66, COMP 1085 FED STD 10TH MATERIAL RESPONSE OR FED STD 66, COMP 1086 FED STD 11TH MATERIAL RESPONSE OR FED STD 66, COMP 1090 FED STD 12TH MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
END PLAY TAKEUP0.041 INCHES MAXIMUM IN
MAJOR THICKNESS0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
INSIDE DIAMETER0.741 INCHES MINIMUM AND 0.756 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEEXTERNAL BOWED
SURFACE TREATMENTCADMIUM AND CHROMATE
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS16628-1081?
MS16628-1081 is a RING,RETAINING.
What is the NSN for MS16628-1081?
MS16628-1081 is cataloged in the U.S. Government catalog under NSN 5325-01-287-9027. 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.