PartsTable
Technical Data Sheet
C1662 ✓ 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: STEEL COMP 1035 OVERALL, head_style: HEXAGON, head_height: 0.547 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 2.000 INCHES NOMINAL IN, fastener_length: 2.750 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 5305-00-426-6728, 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
C1662
NSN: 5305-00-426-6728
FSC: 5305
CAGE: 35311 — AMERICAN STANDARD INC WESTINGHOUSE AIR BRAKE CO DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 1035 OVERALL
head_styleHEXAGON
head_height0.547 INCHES NOMINAL IN
thread_class2A A
thread_length2.000 INCHES NOMINAL IN
fastener_length2.750 INCHES NOMINAL IN
hardness_rating18.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
special_featuresBULK OIL,SOLD IN BULK BY THE GAL. STATE NUMBER OF GALLONS TO ORDER.
thread_directionRIGHT-HAND
fatty_material_typeANY ACCEPTABLE
width_between_flats1.312 INCHES NOMINAL IN
nominal_thread_diameter0.875 INCHES IN
NSN5305-00-426-6728
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: C1662 · 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 QUANTITY PER INCH: 9
HEAD STYLE: HEXAGON
THREAD LENGTH: 2.000 INCHES NOMINAL IN
WIDTH BETWEEN FLATS: 1.312 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
FASTENER LENGTH: 2.750 INCHES NOMINAL IN
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
HARDNESS RATING: 18.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH9
HEAD STYLEHEXAGON
THREAD LENGTH2.000 INCHES NOMINAL IN
WIDTH BETWEEN FLATS1.312 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
FASTENER LENGTH2.750 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
HARDNESS RATING18.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT0.547 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
L40Interchangeable
interchangeable cross-reference
interchangeable
C16.62Interchangeable
interchangeable cross-reference
interchangeable
MOBILGARD 450Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C1662?
C1662 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace C1662?
There are 3 known substitutes for C1662: L40, C16.62, MOBILGARD 450. Substitute compatibility should be verified for your specific system.
What is the NSN for C1662?
C1662 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-426-6728. This indicates validated use in U.S. government and defense supply chains.
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