30H21 — CUP,TAPERED ROLLER BEARING

✓ Government record, cited

— · TAPERED BEARING

PRODUCT OVERVIEW

30H21: CUP,TAPERED ROLLER BEARING.

The CUP,TAPERED ROLLER BEARING is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include radius: 2.125 INCHES NOMINAL IN, material: STEEL, outside_diameter: 1.495 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN, special_features: ROCKWELL HARDNESS B-50 MIN,B-80 MAX; CAN ALSO BE SUPPLIED WITH EDGE CUT,AS IN STYLE B7, style_designator: CONCAVE, material_thickness: 0.078 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-100-0338, 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

30H21

NSN: 3110-00-100-0338
NIINs: 001000338, 011973177
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 61790 — ASTEC INDUSTRIES INC DIV ASTEC IND. (USA)

SPECIFICATIONS

radius	2.125 INCHES NOMINAL IN
material	STEEL
outside_diameter	1.495 INCHES MINIMUM AND 1.505 INCHES MAXIMUM IN
special_features	ROCKWELL HARDNESS B-50 MIN,B-80 MAX; CAN ALSO BE SUPPLIED WITH EDGE CUT,AS IN STYLE B7
style_designator	CONCAVE
material_thickness	0.078 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN
material_document_and_classification	SAE 1008 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1010 ASSN STD SINGLE MATERIAL RESPONSE
NSN	3110-00-100-0338

COMPONENT DIAGRAM

KEY FEATURES

•

STYLE DESIGNATOR: NORMAL ANGLE

•

OUTSIDE DIAMETER: 6.3750 INCHES NOMINAL IN

•

BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN

•

STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2

•

MATERIAL: STEEL OVERALL

TYPICAL APPLICATIONS

Long-term data archival and compliance retention
Offsite backup and disaster recovery
Air-gapped ransomware protection
Cold storage tier for infrequently accessed data

TECHNICAL CHARACTERISTICS

STYLE DESIGNATOR	NORMAL ANGLE
OVERALL WIDTH	1.5000 INCHES NOMINAL IN
OUTSIDE DIAMETER	6.3750 INCHES NOMINAL IN
BACKFACE CORNER RADIUS	0.1250 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATION	AFBMA CLASS 2
MATERIAL	STEEL OVERALL

SUBSTITUTES & CROSS-REFERENCES 7

752Reference document

Same NSN cross-reference

Reference document — Secondary reference

K752Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

457388Reference document

Same NSN cross-reference

Reference document — Secondary reference

7042AReference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

18244HReference document

Same NSN cross-reference

Reference document — Secondary reference

1B3934Reference document

Same NSN cross-reference

Reference document — Secondary 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 30H21?

30H21 is a CUP,TAPERED ROLLER BEARING.

What parts can replace 30H21?

There are 7 known substitutes for 30H21: 752, K752, 457388 and 4 more. Substitute compatibility should be verified for your specific system.

What is the NSN for 30H21?

30H21 is cataloged in the U.S. Government catalog under NSN 3110-00-100-0338. This indicates validated use in U.S. government and defense supply chains.

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