821521 — RING,RETAINING

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

821521: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OR STEEL COMP 1065, usage_design: EXTERNAL, inside_diameter: 0.091 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN, major_thickness: 0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN, casehardening_indicator: NOT CASEHARDENED, material_hardness_rating: 48.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-050-9203, 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

821521

NSN: 5325-00-050-9203
FSC: 5325 — Fastening Devices
CAGE: 33005 — JEWELL INSTRUMENTS LLC (USA)

SPECIFICATIONS

material	STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OR STEEL COMP 1065
ring_style	E
usage_design	EXTERNAL
inside_diameter	0.091 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
major_thickness	0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN
casehardening_indicator	NOT CASEHARDENED
material_hardness_rating	48.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
cross-sectional_shape_style	RECTANGULAR
NSN	5325-00-050-9203

COMPONENT DIAGRAM

KEY FEATURES

•

MATERIAL HARDNESS RATING: 48.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM

•

USAGE DESIGN: EXTERNAL

•

MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66, COMP 1060 FED STD 1ST MATERIAL RESPONSE AND FED STD 66, COMP 1061 FED STD 2ND MATERIAL RESPONSE AND FED STD 66, COMP 1064 FED STD 3RD MATERIAL RESPONSE AND FED STD 66, COMP 1065 FED STD 4TH MATERIAL RESPONSE

•

CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR

•

MAJOR THICKNESS: 0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN

•

INSIDE DIAMETER: 0.091 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN

•

CASEHARDENING INDICATOR: NOT CASEHARDENED

•

RING STYLE: E

TECHNICAL CHARACTERISTICS

MATERIAL HARDNESS RATING	48.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
USAGE DESIGN	EXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATION	FED STD 66, COMP 1060 FED STD 1ST MATERIAL RESPONSE AND FED STD 66, COMP 1061 FED STD 2ND MATERIAL RESPONSE AND FED STD 66, COMP 1064 FED STD 3RD MATERIAL RESPONSE AND FED STD 66, COMP 1065 FED STD 4TH MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
MAJOR THICKNESS	0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN
INSIDE DIAMETER	0.091 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
CASEHARDENING INDICATOR	NOT CASEHARDENED
RING STYLE	E
MATERIAL	STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OR STEEL COMP 1065

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

821521-5Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 821521?

821521 is a RING,RETAINING.

What parts can replace 821521?

There is 1 known substitute for 821521: 821521-5. Substitute compatibility should be verified for your specific system.

What is the NSN for 821521?

821521 is cataloged in the U.S. Government catalog under NSN 5325-00-050-9203. This indicates validated use in U.S. government and defense supply chains.

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821521 — RING,RETAINING

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