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PartsTable / COMPONENT / G-2055 PIECE 58
G-2055 PIECE 58 ✓ 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,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 655 OR COPPER ALLOY 651 OVERALL, head_style: HEXAGON, head_height: 0.378 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 3.318 INCHES NOMINAL IN, fastener_length: 3.500 INCHES NOMINAL 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 5305-01-338-8156, 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
G-2055 PIECE 58
NSN: 5305-01-338-8156
FSC: 5305
CAGE: 55260 — GIL, INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY 655 OR COPPER ALLOY 651 OVERALL
head_styleHEXAGON
head_height0.378 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN
thread_class2A A
thread_length3.318 INCHES NOMINAL IN
fastener_length3.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_between_flats0.922 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
nominal_thread_diameter0.625 INCHES IN
thread_quantity_per_inch11
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
material_document_and_classificationMIL-C-17516 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5305-01-338-8156
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: G-2055 PIECE 58 · 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 SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
•
MATERIAL: COPPER ALLOY 655 OR COPPER ALLOY 651 OVERALL
•
THREAD LENGTH: 3.318 INCHES NOMINAL IN
•
FASTENER LENGTH: 3.500 INCHES NOMINAL IN
•
WIDTH BETWEEN FLATS: 0.922 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-17516 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD DIAMETER0.625 INCHES IN
MATERIALCOPPER ALLOY 655 OR COPPER ALLOY 651 OVERALL
THREAD LENGTH3.318 INCHES NOMINAL IN
FASTENER LENGTH3.500 INCHES NOMINAL IN
WIDTH BETWEEN FLATS0.922 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-17516 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH11
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
AF840Interchangeable
interchangeable cross-reference
interchangeable
CA3637Interchangeable
interchangeable cross-reference
interchangeable
E3TZ9601HInterchangeable
interchangeable cross-reference
interchangeable
46048Interchangeable
interchangeable cross-reference
interchangeable
3616710400Interchangeable
interchangeable cross-reference
interchangeable
123830Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is G-2055 PIECE 58?
G-2055 PIECE 58 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace G-2055 PIECE 58?
There are 6 known substitutes for G-2055 PIECE 58: AF840, CA3637, E3TZ9601H and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for G-2055 PIECE 58?
G-2055 PIECE 58 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-338-8156. 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