National Item Identification Number
01-339-0223
013390223
5305-01-339-0223
5305013390223
National Stock Number
Item Name
SCREW,CLOSE TOLERANCE
Federal Supply Class
5305
Description
A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.
Commercial and Government Entity Code (Supplier Data)
0PTK6
SPS TECHNOLOGIES INC
5195 W 4700 S
SALT LAKE CITY
UT
84118
215-572-3331
06710
06725
06950
ALCOA GLOBAL FASTENERS INC
DIV CITY OF INDUSTRY OPERATIONS
13001 TEMPLE AVE
LA PUENTE
CA
91746
805-991-1270
1RC86
ALCOA GLOBAL FASTENERS INC
DBA ALCOA FASTENING SYSTEM DIV CITY
135 N UNRUH AVE
LA PUENTE
CA
91744
805-991-1270
17446
27624
73197
80539
81205
92215
Reference Numbers (Part Numbers)
BACB30NT4K5
BACB30NT4K5
BACB30NT4K5
BACB30NT4K5
BACB30NT4K5
BACB30NT4K5
BA
Required Categories
THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR
Required Description
UNF
0.250 INCHES
28
3A
RIGHT-HAND
0.389 INCHES NOMINAL
0.686 INCHES MINIMU
