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Technical Data Sheet
PartsTable / COMPONENT / 1771044
1771044 ✓ 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 BOLT,INTERNAL WRENCHING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_height: 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN, thread_length: 0.312 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, fastener_length: 0.678 INCHES MINIMUM AND 0.708 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 5306-00-107-5373, 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
1771044
NSN: 5306-00-107-5373
FSC: 5306
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_height0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
thread_length0.312 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
fastener_length0.678 INCHES MINIMUM AND 0.708 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
width_across_flats0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.190 INCHES IN
NSN5306-00-107-5373
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 1771044 · 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
•
FASTENER LENGTH: 0.678 INCHES MINIMUM AND 0.708 INCHES MAXIMUM IN
•
HEAD DIAMETER: 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ZINC OVERALL
•
THREAD QUANTITY PER INCH: 24
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH0.678 INCHES MINIMUM AND 0.708 INCHES MAXIMUM IN
HEAD DIAMETER0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
SURFACE TREATMENTZINC OVERALL
THREAD QUANTITY PER INCH24
NOMINAL THREAD DIAMETER0.190 INCHES IN
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIALSTEEL OVERALL
THREAD CLASS3A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
44052Interchangeable
interchangeable cross-reference
interchangeable
3004717Interchangeable
interchangeable cross-reference
interchangeable
4100775Interchangeable
interchangeable cross-reference
interchangeable
XLB52Interchangeable
interchangeable cross-reference
interchangeable
305086Interchangeable
interchangeable cross-reference
interchangeable
A-89Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1771044?
1771044 is a BOLT,INTERNAL WRENCHING.
What parts can replace 1771044?
There are 15 known substitutes for 1771044: 44052, 3004717, 4100775 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1771044?
1771044 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-107-5373. 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