PartsTable
Technical Data Sheet
PartsTable / MRO / 1228-8
1228-8 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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 CIRCUIT CARD ASSEMBLY is a the manufacturer industrial component. Key specifications include phase: SINGLE, material: STEEL OVERALL, nut_style: HEXAGON, head_style: FLAT COUNTERSUNK, nut_height: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, point_type: CONVENTIONAL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-225-3840, 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
MRO→ MRO_GENERAL→ 1228-8
NSN: 5305-00-225-3840
FSC: 5305
CAGE: 73734 — FEDERAL SCREW PRODUCTS, INC. (USA)
SPECIFICATIONS
phaseSINGLE
materialSTEEL OVERALL
nut_styleHEXAGON
head_styleFLAT COUNTERSUNK
nut_height0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
point_typeCONVENTIONAL
head_height0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
point_angle118.0 DEGREES NOMINAL
shank_styleSTANDARD TAPER W/TANG
charger_typeMETALLIC RECTIFIER
flute_length8.750 INCHES NOMINAL IN
thread_class2A A
NSN5305-00-225-3840
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1228-8 · 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
•
THREAD LENGTH: 0.719 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
SURFACE FINISH: 63.0 MICROINCHES THREADS
•
HARDNESS RATING: 35.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL: STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1536 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.719 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD DIAMETER0.250 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
SURFACE FINISH63.0 MICROINCHES THREADS
HARDNESS RATING35.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
MATERIALSTEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1536 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 10P STYLE AND 5 GRADE
FASTENER LENGTH0.844 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
6CA262Interchangeable
interchangeable cross-reference
interchangeable
B1821BH025C088NInterchangeable
interchangeable cross-reference
interchangeable
MS35305-7Interchangeable
interchangeable cross-reference
interchangeable
12303783-1Interchangeable
interchangeable cross-reference
interchangeable
SM-A-573717-1Interchangeable
interchangeable cross-reference
interchangeable
60 AND 62REDInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1228-8?
1228-8 is a CIRCUIT CARD ASSEMBLY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 1228-8?
There are 27 known substitutes for 1228-8: 6CA262, B1821BH025C088N, MS35305-7 and 24 more. Substitute compatibility should be verified for your specific system.
Is 1228-8 still available?
1228-8 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026