MIL-R-21248 — RING,RETAINING

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

MIL-R-21248: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, end_style: 90 DEGREE PARALLEL, usage_design: EXTERNAL, inside_diameter: 0.288 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN, major_thickness: 0.375 INCHES NOMINAL IN, strength_rating: ERR-060. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-010-2509, 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

MIL-R-21248

NSN: 5325-00-010-2509
NIINs: 000102509, 000676910, 000685275, 000718907, 001869222, 002002637, 002054208, 002054731, 002056552, 002524725, 002524758, 002527750, 002604883, 002635907, 002816623, 002827120, 002827202, 002986563, 002986564, 003478254, 005140393, 005307957, 005762457, 005980933, 005981414, 005984321, 005986232, 005986334, 006197229, 006821762, 006822070, 006873378, 006873379, 007151152, 007209221, 007209230, 007209235, 007209236, 007217680, 007218360, 007256248, 007272810, 007366335, 007533699, 007533868, 007533929, 007541082, 007541083, 007541619, 007541896, 008007865, 008009928, 008013006, 008036226, 008036227, 008036228, 008037299, 008037301, 008037302, 008037303, 008037304, 008037306, 008037307, 008037308, 008037312, 008037313, 008037314, 008037315, 008037316, 008037317, 008037319, 008037320, 008037321, 008037322, 008038516, 008038518, 008039970, 008039971, 008039974, 008039975, 008039976, 008039977, 008039978, 008039981, 008041509, 008041513, 008042025, 008042026, 008042027, 008042184, 008042185, 008042188, 008042191, 008042192, 008042193, 008042269, 008042270, 008042273, 008042274, 008042275, 008042775, 008042779, 008046896, 008047683, 008047701, 008049732, 008049734, 008049735, 008049737, 008049738, 008049739, 008049740, 008049743, 008049746, 008051072, 008051398, 008056002, 008056004, 008077968, 008080350, 008222136, 008802666, 008915580, 009522237, 010263243, 010263244, 011169577, 011231088, 011262826, 011662057, 012834763, 012931190, 013233132, 014360117, 014678534, 014940000, 014964840
FSC: 5325 — Fastening Devices
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

SPECIFICATIONS

material	STEEL
end_style	90 DEGREE PARALLEL
ring_style	E
usage_design	EXTERNAL
inside_diameter	0.288 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN
major_thickness	0.375 INCHES NOMINAL IN
strength_rating	ERR-060
special_features	ZINC COATING; FOR USE ON A 1.000 INCH DIAMETER SHAFT IN
surface_treatment	CADMIUM AND PHOSPHATE
casehardening_indicator	NOT CASEHARDENED
material_hardness_rating	44.500 ROCKWELL C NOMINAL
cross-sectional_shape_style	RECTANGULAR
NSN	5325-00-010-2509

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: SAE 1065 TO 1090 ASSN STD SINGLE MATERIAL RESPONSE

•

CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR

•

MAJOR THICKNESS: 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN

•

INSIDE DIAMETER: 0.142 INCHES MINIMUM AND 0.146 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	SAE 1065 TO 1090 ASSN STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
MAJOR THICKNESS	0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
INSIDE DIAMETER	0.142 INCHES MINIMUM AND 0.146 INCHES MAXIMUM IN
CASEHARDENING INDICATOR	NOT CASEHARDENED
RING STYLE	E
SURFACE TREATMENT	CADMIUM AND DICHROMATE
MATERIAL	STEEL

SUBSTITUTES & CROSS-REFERENCES 4

MS16633-1018Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

855514-00Reference document

Same NSN cross-reference

Reference document — Secondary reference

9419254Reference document

Same NSN cross-reference

Reference document — Secondary reference

FD9005-3Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is MIL-R-21248?

MIL-R-21248 is a RING,RETAINING.

What parts can replace MIL-R-21248?

There are 4 known substitutes for MIL-R-21248: MS16633-1018, 855514-00, 9419254 and 1 more. Substitute compatibility should be verified for your specific system.

What is the NSN for MIL-R-21248?

MIL-R-21248 is cataloged in the U.S. Government catalog under NSN 5325-00-010-2509. This indicates validated use in U.S. government and defense supply chains.

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