PartsTable
Technical Data Sheet
Download PDF

RST56CDM9 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

RST56CDM9: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include ring_style: SPIRAL, usage_design: INTERNAL, inside_diameter: 0.516 INCHES MINIMUM AND 0.529 INCHES MAXIMUM IN, major_thickness: 0.035 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN, strength_rating: ERR-060, outside_diameter: 0.606 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-030-8661, 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
RST56CDM9
NSN: 5325-01-030-8661
FSC: 5325 — Fastening Devices
CAGE: 80756 — SPIROLOX INC (USA)
SPECIFICATIONS
materialSTEEL COMP 1070 OR STEEL COMP 1074 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1086 OR STEEL COMP 1090
ring_styleSPIRAL
usage_designINTERNAL
inside_diameter0.516 INCHES MINIMUM AND 0.529 INCHES MAXIMUM IN
major_thickness0.035 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN
strength_ratingERR-060
outside_diameter0.606 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleDOUBLE OVAL
material_document_and_classificationAISI/SAE 1070 OR 1074 OR 1078 OR 1080 OR 1084 OR 1086 OR 1090 ASSN STD SINGLE MATERIAL RESPONSE
NSN5325-01-030-8661
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: RST56CDM9 · 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
•
USAGE DESIGN: INTERNAL
•
STRENGTH RATING: ERR-060
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI/SAE 1070 OR 1074 OR 1078 OR 1080 OR 1084 OR 1086 OR 1090 ASSN STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: DOUBLE OVAL
•
OUTSIDE DIAMETER: 0.606 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.035 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.516 INCHES MINIMUM AND 0.529 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
USAGE DESIGNINTERNAL
STRENGTH RATINGERR-060
MATERIAL DOCUMENT AND CLASSIFICATIONAISI/SAE 1070 OR 1074 OR 1078 OR 1080 OR 1084 OR 1086 OR 1090 ASSN STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEDOUBLE OVAL
OUTSIDE DIAMETER0.606 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
MAJOR THICKNESS0.035 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN
INSIDE DIAMETER0.516 INCHES MINIMUM AND 0.529 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESPIRAL
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 1
9M187-56Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy RST56CDM9?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is RST56CDM9?
RST56CDM9 is a RING,RETAINING.
What parts can replace RST56CDM9?
There is 1 known substitute for RST56CDM9: 9M187-56. Substitute compatibility should be verified for your specific system.
What is the NSN for RST56CDM9?
RST56CDM9 is cataloged in the U.S. Government catalog under NSN 5325-01-030-8661. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — RST56CDM9

✓ 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.