The Aviation PointTechnical data sheet · theaviationpoint.com/parts/nuts/an364/
AN364 nut — thin hex self-locking, 250 °F
Nut, Self-Locking, Thin, 250 °F, from AN364 Rev. 4. Every row below is transcribed from the standard and has its own link.
AN364 at a glance
AN364Engineering drawing · dimensions in inches
Cancelled: use MS21042 / MS21083 / MS21245. AN364 is cancelled (MS21042, MS21083 or MS21245 (Notice 1, 21 Oct 1991; not a same-number replacement)). Replacement named by the standard: MS21042, MS21083, MS21245. The old number AN364-640 still turns up on drawings and IPCs: check the replacement for each part before you order.
Specification
Item
Value
Type
Self-locking nut
Material
Steel, copper base alloy or aluminum alloy (dash number column)
Locking
Self-locking: non-metallic insert, or all-metal (see suffix codes)
Item
Value
Max. temperature
250 °F
Procurement
MIL-N-25027
Status
Inactive for design after 13 Mar 1957 (use MS21042, MS21083 or MS21245). Rev. 4 (22 Jul 1969): cancelled except dash 640, 836 and 1024; Notice 1 (21 Oct 1991): AN364 Rev. 4 cancelled, future acquisitions refer to MS21042, MS21083 or MS21245.
Dimensions by size
Dimension, in
No. 6-40 NF-2
No. 8-36 NF-2
No. 10-32 NF-3
1/4-28 NF-3
5/16-24 NF-3
3/8-24 NF-3
7/16-20 NF-3
1/2-20 NF-3
9/16-18 NF-3
5/8-18 NF-3
3/4-16 NF-3
7/8-14 NF-3
1-14 NF-3
1-1/8-12 NF-3
1-1/4-12 NF-3
No. 6-32 NC-2
No. 8-32 NC-2
No. 10-24 NC-3
A — Height (max.; minimum not specified, note a)
.125
—
—
—
.250
—
.312
.312
—
—
.406
.469
.562
.656
.750
.125
.172
—
B — Width across flats
.312
—
.375
—
.500
.563
.625
—
—
—
—
—
—
—
—
.312
—
—
Maximum – minimum as tabulated in AN364 Rev. 4; letters as on the standard's drawing.
Every part number of AN364 Rev. 4, each with its own link. Codes (material, finish) build the full number in the box below.
Part number
What each code means
Part
Meaning
Format
AN364{material}<dash>{insert}
-
Material: Steel (hyphen before the dash number)
B
Material: Copper base alloy (B before the dash number)
D
Material: Aluminum alloy (D before the dash number)
(none)
Insert: No suffix: either all-metal or with non-metallic insert (steel nut)
A
Insert: Nut having a non-metallic insert (A after the dash number)
C
Insert: Nut fabricated entirely from metal (C after the dash number)
Example
AN364-428 — Steel 1/4-28 NF-3 self-locking thin nut, either all-metal or with non-metallic insert (AN364D428 = aluminum alloy; AN364B428A = copper base alloy with non-metallic insert)
Notes from the standard
Fine thread: dash numbers 640 to 2012; coarse thread: 632, 832 (and 1024, struck). Steel dash shown; the copper base alloy dash carries the B prefix and the aluminum alloy dash the D prefix.
(a) Minimum A not specified; limited only by the strength requirement of the specification.
(b) Dash 640 to 836 and B836 for fine thread nuts, and D1024 for coarse thread nuts, inactive for design after 14 Apr 1949.
(c) Qualification not required for dash 640, 836 and 1024.
Washer face and shape of top optional. For installation instructions see the drawing enclosure.
The scan of this sheet is of very poor quality: the dimension values are the best reading; cells flagged in the table were only partly legible.
