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Technical Data Sheet
PartsTable / COMPONENT / BCLX1-1ES1
BCLX1-1ES1 ✓ 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,MACHINE is a the manufacturer industrial component. Key specifications include head_style: FLAT COUNTERSUNK, thread_class: 2A A, head_diameter: 0.722 INCHES MINIMUM AND 0.762 INCHES MAXIMUM IN, thread_length: 1.750 INCHES MINIMUM IN, fastener_length: 2.250 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-042-0701, 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
BCLX1-1ES1
NSN: 5305-00-042-0701
FSC: 5305
CAGE: 00000
SPECIFICATIONS
head_styleFLAT COUNTERSUNK
thread_class2A A
head_diameter0.722 INCHES MINIMUM AND 0.762 INCHES MAXIMUM IN
thread_length1.750 INCHES MINIMUM IN
screw_materialSTEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020
fastener_length2.250 INCHES NOMINAL IN
thread_directionRIGHT-HAND
countersink_angle80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
internal_drive_styleSLOT
nominal_thread_diameter0.375 INCHES IN
screw_surface_treatmentCADMIUM OR ZINC
thread_quantity_per_inch24
NSN5305-00-042-0701
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BCLX1-1ES1 · 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
•
COUNTERSINK ANGLE: 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
•
THREAD SERIES DESIGNATOR: UNF
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD CLASS: 2A A
•
INTERNAL DRIVE STYLE: SLOT
•
NONDEFINITIVE SPEC/STD DATA: I TYPE AND 2S STYLE
•
SCREW MATERIAL: STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020
•
FASTENER LENGTH: 2.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
COUNTERSINK ANGLE80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
THREAD SERIES DESIGNATORUNF
HEAD STYLEFLAT COUNTERSUNK
THREAD CLASS2A A
INTERNAL DRIVE STYLESLOT
NONDEFINITIVE SPEC/STD DATAI TYPE AND 2S STYLE
SCREW MATERIALSTEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020
FASTENER LENGTH2.250 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH1.750 INCHES MINIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
42070Interchangeable
interchangeable cross-reference
interchangeable
2823296-1Interchangeable
interchangeable cross-reference
interchangeable
42070-1Interchangeable
interchangeable cross-reference
interchangeable
FFS92TYPE1STYLE2SInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BCLX1-1ES1?
BCLX1-1ES1 is a SCREW,MACHINE.
What parts can replace BCLX1-1ES1?
There are 4 known substitutes for BCLX1-1ES1: 42070, 2823296-1, 42070-1 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BCLX1-1ES1?
BCLX1-1ES1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-042-0701. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026