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20457-ITEM-28 — 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 SETSCREW is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEADLESS (SETSCREW), point_style: CUP, thread_class: 2A A, thread_length: 1.25 INCHES NOMINAL IN, point_diameter: 0.088 INCHES MINIMUM AND 0.102 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 5305-01-705-6663, 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
20457-ITEM-28
NSN: 5305-01-705-6663
FSC: 5305
CAGE: 28953 — RIX INDUSTRIES (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEADLESS (SETSCREW)
point_styleCUP
thread_class2A A
thread_length1.25 INCHES NOMINAL IN
point_diameter0.088 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
fastener_length1.25 INCHES NOMINAL IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
point_chamfer_angle113.0 DEGREES MINIMUM AND 123.0 DEGREES MAXIMUM
internal_drive_styleSLOT
nominal_thread_diameter0.1900 INCHES IN
NSN5305-01-705-6663
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 20457-ITEM-28 · 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: 24
•
FASTENER LENGTH: 1.25 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
HEAD STYLE: HEADLESS (SETSCREW)
•
POINT DIAMETER: 0.088 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
•
THREAD CLASS: 2A A
•
INTERNAL DRIVE STYLE: SLOT
•
NOMINAL THREAD DIAMETER: 0.1900 INCHES IN
TECHNICAL CHARACTERISTICS
THREAD QUANTITY PER INCH24
FASTENER LENGTH1.25 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
HEAD STYLEHEADLESS (SETSCREW)
POINT DIAMETER0.088 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN
THREAD CLASS2A A
INTERNAL DRIVE STYLESLOT
NOMINAL THREAD DIAMETER0.1900 INCHES IN
THREAD LENGTH1.25 INCHES NOMINAL IN
POINT STYLECUP
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
46556InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SA4179ADXInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
34-674InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
J2656C03LC20G4InterchangeableGOVERNMENT REGISTRY
Setscrew
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20457-ITEM-28?
20457-ITEM-28 is a SETSCREW.
What parts can replace 20457-ITEM-28?
There are 4 known substitutes for 20457-ITEM-28: 46556, SA4179ADX, 34-674 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20457-ITEM-28?
20457-ITEM-28 is cataloged in the Federal Logistics Information System under NSN 5305-01-705-6663. 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: October 2026