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1129E01 ITEM 138 — Technical Data Sheet

✓ 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 SCREW,CAP,SOCKET HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.492 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.735 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN, thread_length: 1.036 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5305-01-084-4677, 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
1129E01 ITEM 138
NSN: 5305-01-084-4677
FSC: 5305
CAGE: 90099 — NORTHROP GRUMMAN SYSTEMS CORPORATION DIV MARINE SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.492 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.735 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
thread_length1.036 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
fastener_length1.190 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
hardness_rating38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentOXIDE OVERALL
width_across_flats0.3750 INCHES MINIMUM AND 0.3790 INCHES MAXIMUM IN
internal_drive_styleHEXAGON
NSN5305-01-084-4677
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1129E01 ITEM 138 · 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
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES DESIGNATOR: UNRC
•
SPECIFICATION/STANDARD DATA: 80205-NAS1352 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
SURFACE TREATMENT: OXIDE OVERALL
•
MINIMUM TENSILE STRENGTH: 170000 POUNDS PER SQUARE INCH LBS
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
WIDTH ACROSS FLATS: 0.3750 INCHES MINIMUM AND 0.3790 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNRC
SPECIFICATION/STANDARD DATA80205-NAS1352 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
SURFACE TREATMENTOXIDE OVERALL
MINIMUM TENSILE STRENGTH170000 POUNDS PER SQUARE INCH LBS
END ITEM IDENTIFICATIONA4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
NOMINAL THREAD DIAMETER0.500 INCHES IN
WIDTH ACROSS FLATS0.3750 INCHES MINIMUM AND 0.3790 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH13
HEAD HEIGHT0.492 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
525001InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
33911InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
7403299InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
380316InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
347-314-011InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
11-00122-00InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1129E01 ITEM 138?
1129E01 ITEM 138 is a SCREW,CAP,SOCKET HEAD.
What parts can replace 1129E01 ITEM 138?
There are 19 known substitutes for 1129E01 ITEM 138: 525001, 33911, 7403299 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1129E01 ITEM 138?
1129E01 ITEM 138 is cataloged in the Federal Logistics Information System under NSN 5305-01-084-4677. This indicates validated use in U.S. government and defense supply chains.
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Last verified: September 2026