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Technical Data Sheet
PartsTable / COMPONENT / 1229D1278
1229D1278 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: WIRE, usage_design: INTERNAL, inside_diameter: 0.530 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN, major_thickness: 0.080 INCHES NOMINAL IN, outside_diameter: 0.690 INCHES MINIMUM AND 0.700 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-359-0778, 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
1229D1278
NSN: 5325-00-359-0778
FSC: 5325
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)
SPECIFICATIONS
materialSTEEL
ring_styleWIRE
usage_designINTERNAL
inside_diameter0.530 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
major_thickness0.080 INCHES NOMINAL IN
outside_diameter0.690 INCHES MINIMUM AND 0.700 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleROUNDED CORNERS
NSN5325-00-359-0778
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1229D1278 · 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
•
OUTSIDE DIAMETER: 0.690 INCHES MINIMUM AND 0.700 INCHES MAXIMUM IN
•
RING STYLE: WIRE
•
USAGE DESIGN: INTERNAL
•
MATERIAL: STEEL
•
MAJOR THICKNESS: 0.080 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: ROUNDED CORNERS
•
MATERIAL HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.690 INCHES MINIMUM AND 0.700 INCHES MAXIMUM IN
RING STYLEWIRE
USAGE DESIGNINTERNAL
MATERIALSTEEL
MAJOR THICKNESS0.080 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEROUNDED CORNERS
MATERIAL HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
CASEHARDENING INDICATORNOT CASEHARDENED
INSIDE DIAMETER0.530 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
38305Interchangeable
interchangeable cross-reference
interchangeable
13206E4482-2Interchangeable
interchangeable cross-reference
interchangeable
4258Interchangeable
interchangeable cross-reference
interchangeable
04258Interchangeable
interchangeable cross-reference
interchangeable
383-04Interchangeable
interchangeable cross-reference
interchangeable
40063-4 ITEM 16Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1229D1278?
1229D1278 is a RING,RETAINING.
What parts can replace 1229D1278?
There are 7 known substitutes for 1229D1278: 38305, 13206E4482-2, 4258 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1229D1278?
1229D1278 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-359-0778. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026