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AN502 screw — fillister, drilled

Screw, Machine, Drilled Fillister Head, Fine Thread, from AN502 Rev. 6. Every row below is transcribed from the standard and has its own link.

AN502 at a glance

AN502, screw, machine, drilled fillister head, fine thread
AN502
AN502 engineering drawing with dimensions
Engineering drawing · dimensions in inches

Specification

ItemValue
Headfillister, drilled
Driveslotted
Thread seriesfine (NF/UNF)
MaterialSteel, AN-S-9, MIL-S-6050 or other steel meeting the same physical requirements.
Heat treatment125,000 to 145,000 psi tensile strength, MIL-H-6875.
ItemValue
FinishCadmium plate, QQ-P-416, Type I, Class C.
ProcurementMIL-S-7839
Thread specificationMIL-S-7742
StatusRev. 6 (11 May 1953). Sizes No. 6-40 and No. 8-36 are struck from the sheet (inactive for design after 12 May 1950, note b).

Dimensions by size

Dimension, in10-32 NF-3A1/4-28 UNF-3A5/16-24 UNF-3A
A — major diameter, max.1900.2500.3125
B — head diameter.313 – .292.414 – .389.518 – .490
C — head height.180 – .165.237 – .219.295 – .276
D.130 – .123.170 – .161.211 – .201
E (ref.).043.062.078
G — grip.063 – .031.078 – .046.078 – .046
H — slot depth.075 – .064.102 – .087.130 – .110
J — slot width.060 – .050.075 – .064.084 – .072
K — drilled hole.046.062.070
M, max.031.031.047

Minimum – maximum as tabulated in AN502 Rev. 6; letters as on the standard's drawing.

Part numbers and lengths

Every part number of AN502 Rev. 6, by thread size, each with its own link.

10-32 NF-3A12 part numbers

Part no.Length, inTol.
AN502-10-41/4+0/-1/32
AN502-10-63/8+0/-1/32
AN502-10-81/2+0/-1/32
AN502-10-105/8+0/-1/32
AN502-10-123/4+0/-1/32
AN502-10-147/8+0/-1/32
AN502-10-161+0/-1/32
AN502-10-181-1/8+0/-1/16
AN502-10-201-1/4+0/-1/16
AN502-10-221-3/8+0/-1/16
AN502-10-241-1/2+0/-1/16
AN502-10-261-5/8+0/-1/16

1/4-28 UNF-3A14 part numbers

Part no.Length, inTol.
AN502-416-63/8+0/-1/32
AN502-416-81/2+0/-1/32
AN502-416-105/8+0/-1/32
AN502-416-123/4+0/-1/32
AN502-416-147/8+0/-1/32
AN502-416-161+0/-1/32
AN502-416-181-1/8+0/-1/16
AN502-416-201-1/4+0/-1/16
AN502-416-221-3/8+0/-1/16
AN502-416-241-1/2+0/-1/16
AN502-416-261-5/8+0/-1/16
AN502-416-281-3/4+0/-1/16
AN502-416-301-7/8+0/-1/16
AN502-416-322+0/-1/16

5/16-24 UNF-3A11 part numbers

Part no.Length, inTol.
AN502-516-123/4+0/-1/32
AN502-516-147/8+0/-1/32
AN502-516-161+0/-1/32
AN502-516-181-1/8+0/-1/16
AN502-516-201-1/4+0/-1/16
AN502-516-221-3/8+0/-1/16
AN502-516-241-1/2+0/-1/16
AN502-516-261-5/8+0/-1/16
AN502-516-281-3/4+0/-1/16
AN502-516-301-7/8+0/-1/16
AN502-516-322+0/-1/16

Part number

How a AN502 part number is built, segment by segment

What each code means

PartMeaning
FormatAN502-<size>-<length>
-10Size No. 10-32
-416Size 1/4-28
-516Size 5/16-24
LengthLength in sixteenths of an inch (-10 = 10/16 = 5/8 in)
ExampleAN502-10-10 = No. 10-32 screw, 5/8 inch long
Length tolerance, up to 1 in+0/-1/32
Length tolerance, 1-1/8 to 2 in+0/-1/16

Notes from the standard

  • Drilled hole to be on center approximately at right angles to the slot, but must not break through the base or top (spherical portion) of the head (note a).
  • Reference dimensions are for design purposes only and are not an inspection requirement (note c).
  • Mark with raised or recessed X; only one X to be visible after slotting; position optional.
  • Maximum 2 incomplete threads.
  • Screws shall be free of all loose or hanging burrs or slivers which might become dislodged under usage.

Related

CalculatorPart number cross-referenceType any AN502 number and land on its row.GuideScrewsThe family side by side.Data sheetAN565Setscrew, Hexagon and Fluted Socket, HeadlessData sheetAN503Screw, Machine, Drilled Fillister Head, Coarse Thread

Sources

Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.
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