MS 51958 Machine Screws | McMaster-Carr

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	Specifications Met Specifications Met

Mil. Spec.

	System of Measurement System of Measurement

Inch

	Thread Size Thread Size

	Length Length

	Material Material

Stainless Steel

	Finish Finish

Black Oxide

Passivated

	Drive Style Drive Style

	Phillips

	Rounded Head Style Rounded Head Style

	Pan

	Head Type Head Type

	Rounded

	Threading Threading

	Fully Threaded

	Thread Fit Thread Fit

Class 2A

	Hardness Hardness

Not Rated

	Thread Direction Thread Direction

	Right Hand

	Thread Type Thread Type

UNF

	Tensile Strength Tensile Strength

80,000 to 99,999 psi

	Drive Size Drive Size

No. 0

No. 2

No. 3

	Rounded Head Profile Rounded Head Profile

Standard

	Head Diameter Head Diameter

	Thread Spacing Thread Spacing

Fine

	Head Height Head Height

34 Products

About Rounded Head Screws

Passivated

Black Oxide

Choose these pan head screws for their adherence to strict military standards for material and construction. Made from 18-8 stainless steel, they are chemical resistant and may be mildly magnetic. Length is measured from under the head.

Passivated screws meet Fed. Spec. QQ-P-35 for added protection against oxidation and corrosion.

For technical drawings and 3-D models, click on a part number.

Passivated 18-8 Stainless Steel
Lg.	Threading	Head Dia.	Head Ht.	Drive Size	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
0-80
1/8"	Fully Threaded	0.116"	0.044"	No. 0	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-120, NASM51958	100	000000000	000000
3/16"	Fully Threaded	0.116"	0.044"	No. 0	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-121, NASM51958	100	000000000	00000
1/4"	Fully Threaded	0.116"	0.044"	No. 0	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-122, NASM51958	100	000000000	00000
5/16"	Fully Threaded	0.116"	0.044"	No. 0	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-123, NASM51958	100	000000000	00000
3/8"	Fully Threaded	0.116"	0.044"	No. 0	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-124, NASM51958	100	000000000	00000
7/16"	Fully Threaded	0.116"	0.044"	No. 0	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-125, NASM51958	25	000000000	00000
1/2"	Fully Threaded	0.116"	0.044"	No. 0	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-126, NASM51958	25	000000000	00000
6-40
1/4"	Fully Threaded	0.270"	0.097"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-26, NASM51958	25	000000000	00000
5/16"	Fully Threaded	0.270"	0.097"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-27, NASM51958	25	000000000	00000
3/8"	Fully Threaded	0.270"	0.097"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-28, NASM51958	25	000000000	00000
10-32
1/4"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-59, NASM51958	50	000000000	00000
5/16"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-60, NASM51958	50	000000000	00000
3/8"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-61, NASM51958	50	000000000	0000
7/16"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-62, NASM51958	50	000000000	00000
1/2"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-63, NASM51958	50	000000000	0000
5/8"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-64, NASM51958	50	000000000	00000
3/4"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-65, NASM51958	25	000000000	0000
7/8"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-66, NASM51958	25	000000000	0000
1"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-67, NASM51958	25	000000000	0000
1 1/4"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-68, NASM51958	25	000000000	00000
1 1/2"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-69, NASM51958	25	000000000	00000
2"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-71, NASM51958	10	000000000	0000
1/4"-28
1/2"	Fully Threaded	0.492"	0.175"	No. 3	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-79, NASM51958	25	000000000	00000
5/8"	Fully Threaded	0.492"	0.175"	No. 3	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-80, NASM51958	25	000000000	00000
3/4"	Fully Threaded	0.492"	0.175"	No. 3	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-81, NASM51958	10	000000000	0000
7/8"	Fully Threaded	0.492"	0.175"	No. 3	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-82, NASM51958	10	000000000	00000
1"	Fully Threaded	0.492"	0.175"	No. 3	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-83, NASM51958	10	000000000	0000
1 1/4"	Fully Threaded	0.492"	0.175"	No. 3	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-84, NASM51958	10	000000000	00000
1 1/2"	Fully Threaded	0.492"	0.175"	No. 3	80,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51958-85, NASM51958	10	000000000	00000
Black-Oxide 18-8 Stainless Steel
10-32
1/4"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, MS51958-59, NASM51958	10	000000000	0000
3/8"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, MS51958-61, NASM51958	10	000000000	0000
1/2"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, MS51958-63, NASM51958	10	000000000	0000
3/4"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, MS51958-65, NASM51958	10	000000000	0000
1"	Fully Threaded	0.373"	0.133"	No. 2	80,000	Fed. Spec. FF-S-92, MS51958-67, NASM51958	10	000000000	00000

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About Rounded Head Screws

Mil. Spec. Stainless Steel Pan Head Phillips Screws