MS18065

THREAD	D DIA MAX	F		H DIA		SELF-LOCKING DESIGN DATA	T HEX DEPTH
		F		H DIA		P(d)	T HEX DEPTH
		MAX	MIN	MAX	MIN	50^o MAX	MIN
#4-40NC-3A	.112	.0510	.0500	.061	.051	.062	.040
#6-32NC-3A	.138	.0635	.0625	.074	.064	.076	.050
#8-32NC-3A	.164	.0791	.0781	.087	.076	.085	.062
#10-32NF-3A	.190	.0947	.0937	.102	.088	.093	.075
1/4-28UNF-3A	.250	.1270	.1250	.132	.118	. 116	.100
5/16-24UNF-3A	.3125	.1582	.1562	.172	.156	.136	.125
3/8-24UNF-3A	.375	.1895	.1875	.212	.194	.151	.150
1/2-20UNF-3A	.500	.2520	.2500	.291	.270	.188	.200

L LENGTH TOLERANCE		DASH NUMBERS (a)
L LENGTH TOLERANCE		#4-40	#6-32	#8-32	#10-32	1/4-28	5/16-24	3/8-24	1/2-20
1/8	+.010	1	2	3	4
3/16		5	6	7	8	9
1/4		10	11	12	13	14	15
5/16		16	17	18	19	20	21
3/8		22	23	24	25	26	27	91	92
7/16		89	90	30	31	32
1/2		33	34	35	36	37	38	39	40
9/16		41	42	43	44	45
5/8		46	47	48	49	50	51	52	53
3/4	+.015		54	55	56	57	58	59	60
7/8			61	62		63	64	65	66
1				67	68	69	70	71	72
1-1/4						73	74	75	76
1-1/2	+.020					77	78	79	80
1-3/4		For lengths above heavy line see note (g)					81	82	83
2		For lengths above heavy line see note (g)					84	85	86
2-1/2	+.031								87
3	+.031								88
This Standard takes precedence over documents referenced herein. Reference documents shall be of the issue in effect on the date of invitation for bid.
P.A. NAVY - WP Other Cust Army - WC USAF - 69			TITLE SETSCREW, HEXAGON SOCKET, FLAT POINT, 250^°F SELF LOCKING ELEMENT, ALLOY STEEL, CADMIUM PLATED				MILITARY STANDARD
							MS18065
PROCUREMENT SPECIFICATION FF-S-200 & MIL-F-18240			SUPERSEDES:				SHEET 1 OF 2
APPROVED 4 JUNE 63 REVISED A 22 DECEMBER 64

FED.SUP CLASS 5303
(a) Unassigned dash numbers shall not be used. (b) Socket end of screw shall be flat and chamfered. The chamfer shall extend to the minor diameter of the thread and the edge between flat and chamfer shall be slightly rounded. (c) Location of effective locking area "X" shall be in accordance with MS 15981 except as noted herein. (d) ^PMax. = Maximum point plus minimum of 1 thread pitch. For ease in starting, locking element shall not be effective within this area. (e) Maximum major thread diameter plus .010 = Maximum ring gage diameter that locking region of part must pass through freely or with finger pressure. (f) See MS51965 and MS51966 for set screws without self-locking feature. (g) As MIL-F-18240 doesn't establish torque requirements for items above heavy line, only a positive indication of torque is required. MATERIAL: Steel, alloy (See Procurement Specification). Hardened by quenching In oil from the hardening temperature and tempered to a Rockwell Hardness of C 33-40 or equivalent. LOCKING ELEMENT: In accordance with Specification MIL-F-18240. DESIGN AND USAGE LIMITATIONS: See MS 15981. FINISH: Steel: Cadmium plate Specification QQ-P-416, Type II, Class 3. Except that paragraph 4. 4. 5 is not applicable. EXAMPLE OF PART NUMBER: MS-18065-67 = ¼-28UNF-3A x 3/4 long cadmium plated steel flat point self-locking set screw.
P.A. NAVY - WP Other Cust Army - WC USAF - 69	TITLE SETSCREW, HEXAGON SOCKET, FLAT POINT, 250^°F SELF LOCKING ELEMENT, ALLOY STEEL, CADMIUM PLATED	MILITARY STANDARD
		MS18065
PROCUREMENT SPECIFICATION FF-S-200 & MIL-F-18240	SUPERSEDES:	SHEET 2 OF 2
APPROVED 4 JUNE 63 REVISED A 22 DECEMBER 64

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Military/Aerospace Socket Set Screw - Hex Flat Point - Alloy, Cad Plated

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