MS35215 at a glance

Specification

Item	Value
Head	pan
Drive	cross-recess (MS9006)
Thread series	fine (UNF-2A)
Material	Brass per QQ-B-613, QQ-B-626 or QQ-W-321 (Amendment 1: ASTM B16, ASTM B36/B36M, ASTM B121/B121M or ASTM B124). Minimum ultimate tensile strength 55,000 psi.

Item	Value
Finish	Black chemical finish per MIL-F-495; or cadmium plate QQ-P-416 Type II Class 3 when required (letter C after the dash number).
Procurement	FF-S-92
Thread specification	FED-STD-H28/2
Status	Rev. C (31 Dec 1987) with Amendment 1 (5 Oct 1992). Notice 1 (27 Oct 1999): canceled and superseded by NASM35215; the part numbers are identical (MS35215-1 = NASM35215-1). Approved 25 Jun 1953.

Dimension, in	.0860-64 UNF-2A	.1120-48 UNF-2A	.1380-40 UNF-2A	.1640-36 UNF-2A	.1900-32 UNF-2A	.2500-28 UNF-2A	.3125-24 UNF-2A	.3750-24 UNF-2A
nominal	#2	#4	#6	#8	#10	1/4	5/16	3/8
D body dia	.0733 – .0860	.0954 – .1120	.1184 – .1380	.1424 – .1640	.1658 – .1900	.2225 – .2500	.2806 – .3125	.3430 – .3750
A head dia	.155 – .167	.205 – .219	.256 – .270	.306 – .322	.357 – .373	.473 – .492	.594 – .615	.716 – .740
H head height	.053 – .062	.070 – .080	.087 – .097	.105 – .115	.122 – .133	.162 – .175	.203 – .218	.244 – .261
P head radius min	.010	.010	.015	.015	.020	.035	.040	.040
R fillet max	.013	.017	.021	.025	.029	.038	.047	.056
driver size	1	1	2	2	2	3	4	4
min tensile lbf	215	360	550	810	1100	2000	3150	4800
threads per inch	64	48	40	36	32	28	24	24

Minimum – maximum as tabulated in MS35215 Rev. C; letters as on the standard's drawing.

Every part number of MS35215 Rev. C, by thread size, each with its own link.

.0860-64 UNF-2A9 part numbers · tolerance +.00/-.03

.1120-48 UNF-2A11 part numbers · tolerance +.00/-.03

.1380-40 UNF-2A15 part numbers

.1640-36 UNF-2A15 part numbers

.1900-32 UNF-2A15 part numbers

.2500-28 UNF-2A14 part numbers

.3125-24 UNF-2A13 part numbers

.3750-24 UNF-2A13 part numbers

Lengths are printed to two decimals; the sheet example gives the .12 length as .125.
Driver size (Phillips) per sheet: 1 for #2 and #4; 2 for #6, #8 and #10; 3 for 1/4; 4 for 5/16 and 3/8. Recess per MS9006.
Full form threads extend to within 2 threads or less of the head bearing surface for lengths through 2.00 in; longer lengths have a minimum full form thread length of 1.50 in.
Amendment 1 changes the head radius P from a minimum to a reference value.
Interchangeability (Table II, sheet 3): screws covered by dash numbers in MS35213, MS35230, MS35232 and, in part, AN520 are canceled after 17 Dec 1962; the canceled screws cannot always replace the new ones and are used until stock is depleted. MS35213 screws are superseded by MS35215 screws with the same dash numbers; AN520 dash numbers with an "R" in place of the "-" are superseded by the same MS35215 dash numbers as those with the "-". "no replacement" = no superseding screw. The AN520 suffix is printed without the AN520 prefix on the sheet.

MS35215 Rev. C, 31 Dec 1987 — Screw, Machine-Pan Head, Cross-Recessed, Brass, UNF-2A — dimensions, part numbers and notes. Public domain, distribution unlimited. Notices: 5 Oct 1992 Amendment 1: Table I, P head radius: "MIN" replaced by "Reference". Requirement 1, material: brass shall be in accordance with ASTM B16, ASTM B36/B36M, ASTM B121/B121M or ASTM B124. Requirement 3, threads: FED-STD-H28/2; acceptability of screw threads in accordance with FED-STD-H28/20, System 21.; 1 27 Oct 1999 MS35215C is canceled and superseded by NASM35215. The Part Identification Number for MS35215C and the part number for NASM35215 are identical.

Part	Meaning
Format	MS35215-<dash number>[C]
Example	MS35215-1 = brass, cross recessed, black chemical finish, .0860-64 UNF-2A, .125 long; MS35215-1C = same with cadmium plate
Length tolerance, .12 to 1.00	+.00/-.03
Length tolerance, 1.25 to 2.00	+.00/-.06
Length tolerance, 2.25 to 3.00	+.00/-.09
Dash	Dash number from Table I selects thread size and length (1 to 105)
(none)	Finish: black chemical finish per MIL-F-495
C	Finish: cadmium plate per QQ-P-416 Type II Class 3