MIL-DTL-21248 — RING,RETAINING

✓ Government record, cited

— · BOLT SCREW

PRODUCT OVERVIEW

MIL-DTL-21248: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 632, end_style: VERTEX BELOW CENTER, ring_style: EXTERNAL, gap_opening: OPENING 90 DEGREES OR MORE, usage_design: EXTERNAL, inside_diameter: 6.050 INCHES MINIMUM AND 6.120 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-004-3138, 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-DTL-21248

NSN: 5325-00-004-3138
NIINs: 000043138, 000062317, 000066652, 000066657, 000076111, 000200348, 000432510, 000544996, 000568251, 000596363, 000644318, 000685275, 000685743, 000690584, 000694229, 000780114, 000786219, 000842403, 001015903, 001561631, 001636563, 001698007, 001698039, 001698040, 001698045, 001738069, 001749885, 001749893, 001804949, 001869480, 001879033, 001879034, 001930680, 002002637, 002005197, 002006731, 002007234, 002007366, 002007367, 002008772, 002008845, 002008974, 002020194, 002054258, 002054733, 002054756, 002055118, 002056552, 002093456, 002118016, 002249018, 002249394, 002252762, 002290309, 002363591, 002410447, 002483149, 002524689, 002524697, 002524702, 002524721, 002524753, 002524756, 002524758, 002524763, 002524770, 002526865, 002527760, 002544904, 002604875, 002604882, 002604883, 002632659, 002632667, 002635866, 002635877, 002635907, 002635915, 002813586, 002816467, 002816623, 002819856, 002820748, 002820793, 002821593, 002821596, 002821603, 002821604, 002821605, 002821617, 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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 COMP 632
end_style	VERTEX BELOW CENTER
ring_style	EXTERNAL
gap_opening	OPENING 90 DEGREES OR MORE
usage_design	EXTERNAL
inside_diameter	6.050 INCHES MINIMUM AND 6.120 INCHES MAXIMUM IN
major_thickness	0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
strength_rating	ERR-060
outside_diameter	3.515 INCHES NOMINAL IN
special_features	CAGE 96906 HAS DISIGN CONTROL
surface_treatment	PASSIVATE
casehardening_indicator	NOT CASEHARDENED
NSN	5325-00-004-3138

COMPONENT DIAGRAM

KEY FEATURES

•

MATERIAL HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM

•

USAGE DESIGN: INTERNAL

•

MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66 AISI 1066 OR 1069 OR 1070 OR 1072 OR 1074 OR 1075 OR 1078 OR 1080 OR 1084 OR 1086 OR 1090 FED STD ALL MATERIAL RESPONSES

•

CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR

•

OUTSIDE DIAMETER: 5.705 INCHES MINIMUM AND 5.835 INCHES MAXIMUM IN

•

MAJOR THICKNESS: 0.121 INCHES MINIMUM AND 0.129 INCHES MAXIMUM IN

•

CASEHARDENING INDICATOR: NOT CASEHARDENED

•

RING STYLE: INTERNAL

TECHNICAL CHARACTERISTICS

MATERIAL HARDNESS RATING	45.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
USAGE DESIGN	INTERNAL
MATERIAL DOCUMENT AND CLASSIFICATION	FED STD 66 AISI 1066 OR 1069 OR 1070 OR 1072 OR 1074 OR 1075 OR 1078 OR 1080 OR 1084 OR 1086 OR 1090 FED STD ALL MATERIAL RESPONSES
CROSS-SECTIONAL SHAPE STYLE	RECTANGULAR
OUTSIDE DIAMETER	5.705 INCHES MINIMUM AND 5.835 INCHES MAXIMUM IN
MAJOR THICKNESS	0.121 INCHES MINIMUM AND 0.129 INCHES MAXIMUM IN
CASEHARDENING INDICATOR	NOT CASEHARDENED
RING STYLE	INTERNAL
SURFACE TREATMENT	CADMIUM AND CHROMATE
MATERIAL	STEEL COMP 1066 OR STEEL COMP 1069 OR STEEL COMP 1070 OR STEEL COMP 1072 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1086 OR STEEL COMP 1090

OTHER ITEMS IN FSC 5325 — Fastening Devices

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5325-00-001-4967 5325-00-008-2920 5325-00-013-2876 5325-00-071-8949 5325-00-141-7216

SUBSTITUTES & CROSS-REFERENCES 3

MS16625-1525Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

3000-X525-ST-CDReference document

Same NSN cross-reference

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

N1300-525CDReference document

Same NSN cross-reference

Reference document — Secondary reference

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-DTL-21248?

MIL-DTL-21248 is a RING,RETAINING.

What parts can replace MIL-DTL-21248?

There are 3 known substitutes for MIL-DTL-21248: MS16625-1525, 3000-X525-ST-CD, N1300-525CD. Substitute compatibility should be verified for your specific system.

What is the NSN for MIL-DTL-21248?

MIL-DTL-21248 is cataloged in the U.S. Government catalog under NSN 5325-00-004-3138. This indicates validated use in U.S. government and defense supply chains.

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