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918219C1 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

918219C1: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include ring_style: SPECIAL FLAT, usage_design: INTERNAL, inside_diameter: 5.203 INCHES MINIMUM AND 5.248 INCHES MAXIMUM IN, major_thickness: 0.068 INCHES MINIMUM AND 0.076 INCHES MAXIMUM IN, strength_rating: ERR-060, outside_diameter: 5.703 INCHES MINIMUM AND 5.748 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-220-1322, 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
918219C1
NSN: 5325-01-220-1322
FSC: 5325 — Fastening Devices
CAGE: 66195 — SOLAR TURBINES INCORPORATED DBA SOLAR TURBINES INCORPORATED (USA)
SPECIFICATIONS
materialSTEEL COMP 1070 OR STEEL COMP 1572 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1085 OR STEEL COMP 1086 OR STEEL COMP 1090
ring_styleSPECIAL FLAT
usage_designINTERNAL
inside_diameter5.203 INCHES MINIMUM AND 5.248 INCHES MAXIMUM IN
major_thickness0.068 INCHES MINIMUM AND 0.076 INCHES MAXIMUM IN
strength_ratingERR-060
outside_diameter5.703 INCHES MINIMUM AND 5.748 INCHES MAXIMUM IN
surface_treatmentCADMIUM
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleDOUBLE OVAL
surface_treatment_document_and_classificationQQ-P-416, TYPE 1, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE
NSN5325-01-220-1322
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 918219C1 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416, TYPE 1, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE
•
STRENGTH RATING: ERR-060
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66, COMP 1070 FED STD 1ST MATERIAL RESPONSE AND FED STD 66, COMP 1072 FED STD 2ND MATERIAL RESPONSE AND FED STD 66, COMP 1074 FED STD 3RD MATERIAL RESPONSE AND FED STD 66, COMP 1075 FED STD 4TH MATERIAL RESPONSE AND FED STD 66, COMP 1078 FED STD 5TH MATERIAL RESPONSE AND FED STD 66, COMP 1080 FED STD 6TH MATERIAL RESPONSE AND FED STD 66, COMP 1084 FED STD 7TH MATERIAL RESPONSE AND FED STD 66, COMP 1085 FED STD 8TH MATERIAL RESPONSE AND FED STD 66, COMP 1086 FED STD 9TH MATERIAL RESPONSE AND FED STD 66, COMP 1090 FED STD 10TH MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: DOUBLE OVAL
•
OUTSIDE DIAMETER: 5.703 INCHES MINIMUM AND 5.748 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.068 INCHES MINIMUM AND 0.076 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 5.203 INCHES MINIMUM AND 5.248 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
USAGE DESIGNINTERNAL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416, TYPE 1, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE
STRENGTH RATINGERR-060
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66, COMP 1070 FED STD 1ST MATERIAL RESPONSE AND FED STD 66, COMP 1072 FED STD 2ND MATERIAL RESPONSE AND FED STD 66, COMP 1074 FED STD 3RD MATERIAL RESPONSE AND FED STD 66, COMP 1075 FED STD 4TH MATERIAL RESPONSE AND FED STD 66, COMP 1078 FED STD 5TH MATERIAL RESPONSE AND FED STD 66, COMP 1080 FED STD 6TH MATERIAL RESPONSE AND FED STD 66, COMP 1084 FED STD 7TH MATERIAL RESPONSE AND FED STD 66, COMP 1085 FED STD 8TH MATERIAL RESPONSE AND FED STD 66, COMP 1086 FED STD 9TH MATERIAL RESPONSE AND FED STD 66, COMP 1090 FED STD 10TH MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEDOUBLE OVAL
OUTSIDE DIAMETER5.703 INCHES MINIMUM AND 5.748 INCHES MAXIMUM IN
MAJOR THICKNESS0.068 INCHES MINIMUM AND 0.076 INCHES MAXIMUM IN
INSIDE DIAMETER5.203 INCHES MINIMUM AND 5.248 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESPECIAL FLAT
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
MIL-DTL-27426Reference document
Same NSN cross-reference
Reference document — Identification reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 918219C1?
918219C1 is a RING,RETAINING.
What parts can replace 918219C1?
There is 1 known substitute for 918219C1: MIL-DTL-27426. Substitute compatibility should be verified for your specific system.
What is the NSN for 918219C1?
918219C1 is cataloged in the U.S. Government catalog under NSN 5325-01-220-1322. 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.