AN174 at a glance

Specification

Item	Value
Type	Close tolerance bolt
Status	Check the current issue before design use.

Dimension, in	.2500-28
Thread	.2500-28

Thread as stated for the standard. Head and shank dimensions are not shown here: take them from the standard.

Part numbers commonly stocked, with grip and length. The standard governs and may list others.

.2500-2861 part numbers

Part	Meaning
Format	AN174-<dash>
A	Variant: Undrilled shank (after the dash)
C	Variant: Corrosion resistant steel (after the basic number)
H	Variant: Drilled head (after the basic number)
Example	AN174-5A — Close tolerance bolt, .2500-28 thread, grip 3/16, length 21/32, drilled shank

A after the dash number: undrilled shank (rows without A are drilled).
C after the basic number: corrosion resistant steel. H after the basic number: drilled head. These variants appear in the rows with C or H in the number.
Part number format as commonly written; check the standard for the exact format.
Approved data governs. Use the bolt the SRM, drawing or IPC calls for.

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AN174 — Bolt, Close Tolerance, Hexagon Head — nominal sizes and part numbers.