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UR-281 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

UR-281: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302, ring_style: SPECIAL, usage_design: INTERNAL, inside_diameter: 2.762 INCHES MINIMUM AND 2.787 INCHES MAXIMUM IN, major_thickness: 0.029 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN, outside_diameter: 2.920 INCHES MINIMUM AND 2.945 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-841-2331, 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
UR-281
NSN: 5325-00-841-2331
NIINs: 008412331, 010838356
FSC: 5325 — Fastening Devices
CAGE: 80756 — SPIROLOX INC (USA)
SPECIFICATIONS
materialSTEEL COMP 302
ring_styleSPECIAL
usage_designINTERNAL
inside_diameter2.762 INCHES MINIMUM AND 2.787 INCHES MAXIMUM IN
major_thickness0.029 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN
outside_diameter2.920 INCHES MINIMUM AND 2.945 INCHES MAXIMUM IN
fsc_application_dataAN/TPB-1C
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleROUNDED CORNERS
material_document_and_classificationFED STD NO. 66 AISI C1070 THRU 1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
NSN5325-00-841-2331
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: UR-281 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD NO. 66 AISI C1070 THRU 1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OUTSIDE DIAMETER: 2.920 INCHES NOMINAL IN
•
MAJOR THICKNESS: 0.031 INCHES NOMINAL IN
•
INSIDE DIAMETER: 2.604 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: SPECIAL
TECHNICAL CHARACTERISTICS
USAGE DESIGNINTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD NO. 66 AISI C1070 THRU 1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER2.920 INCHES NOMINAL IN
MAJOR THICKNESS0.031 INCHES NOMINAL IN
INSIDE DIAMETER2.604 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESPECIAL
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 4
3-300-554-01Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
PL-A-2218 PIECE 100Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
12286818Reference document
Same NSN cross-reference
Reference document — Secondary reference
3-300-193-01Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is UR-281?
UR-281 is a RING,RETAINING.
What parts can replace UR-281?
There are 4 known substitutes for UR-281: 3-300-554-01, PL-A-2218 PIECE 100, 12286818 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for UR-281?
UR-281 is cataloged in the U.S. Government catalog under NSN 5325-00-841-2331. This indicates validated use in U.S. government and defense supply chains.
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