MS 51959 Machine Screws | McMaster-Carr

Filter by

Military Specification

Thread Size

Length

Countersink Angle

Fastener Head Type

Drive Style

Head Diameter

Material

Flat Head Profile

Specifications Met

Federal Specification

SAE AMS2700

Finish

Passivated

System of Measurement

Threading

Head Height

DFARS Specialty Metals

Compliant

Thread Direction

Right Hand

Thread Type

UNC

Thread Fit

Unified Standard Class 2A

Drive Size

Thread Spacing

Export Control Classification Number (ECCN)

REACH

RoHS

Hardness

Tensile Strength

60,000 psi to 99,999 psi

Certificate Type

Material Certificate with Traceable Lot Number

Forward

How can we improve?

72 Products

About Flat Head Screws

Passivated

Undercut Profile

Standard Profile

Choose these screws for their adherence to strict military standards for material and construction. They have good chemical resistance and may be mildly magnetic. Screws are angled under the head to sit flush within countersunk holes. Length is measured from the top of the head.

Screws with an undercut profile have a shallow head for use in thin materials. Passivated stainless steel screws protect against oxidation and corrosion.

Passivated 18-8 Stainless Steel—82° Countersink Angle
Lg.	Threading	Flat Head Profile	Head Dia.	Head Ht.	Drive Size	Tensile Strength, psi	Specifications Met	Pkg. Qty.		Pkg.
2-56
1/8"	Fully Threaded	Undercut	0.172"	0.036"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-1, SAE AMS2700	50	000000000	00000
3/16"	Fully Threaded	Standard	0.172"	0.051"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-2, SAE AMS2700	100	000000000	00000
1/4"	Fully Threaded	Standard	0.172"	0.051"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-3, SAE AMS2700	100	000000000	00000
5/16"	Fully Threaded	Standard	0.172"	0.051"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-4, SAE AMS2700	100	000000000	00000
3/8"	Fully Threaded	Standard	0.172"	0.051"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-5, SAE AMS2700	100	000000000	00000
7/16"	Fully Threaded	Standard	0.172"	0.051"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-6, SAE AMS2700	50	000000000	0000
1/2"	Fully Threaded	Standard	0.172"	0.051"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-7, SAE AMS2700	100	000000000	00000
5/8"	Fully Threaded	Standard	0.172"	0.051"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-8, SAE AMS2700	50	000000000	00000
3/4"	Fully Threaded	Standard	0.172"	0.051"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-9, SAE AMS2700	50	000000000	00000
7/8"	Fully Threaded	Standard	0.172"	0.051"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-10, SAE AMS2700	25	000000000	0000
4-40
3/16"	Fully Threaded	Undercut	0.225"	0.047"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-12, SAE AMS2700	50	000000000	0000
1/4"	Fully Threaded	Standard	0.225"	0.067"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-13, SAE AMS2700	100	000000000	00000
5/16"	Fully Threaded	Standard	0.225"	0.067"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-14, SAE AMS2700	100	000000000	00000
3/8"	Fully Threaded	Standard	0.225"	0.067"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-15, SAE AMS2700	100	000000000	00000
7/16"	Fully Threaded	Standard	0.225"	0.067"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-16, SAE AMS2700	50	000000000	0000
1/2"	Fully Threaded	Standard	0.225"	0.067"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-17, SAE AMS2700	50	000000000	0000
5/8"	Fully Threaded	Standard	0.225"	0.067"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-18, SAE AMS2700	50	000000000	00000
3/4"	Fully Threaded	Standard	0.225"	0.067"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-19, SAE AMS2700	50	000000000	00000
7/8"	Fully Threaded	Standard	0.225"	0.067"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-20, SAE AMS2700	50	000000000	00000
1"	Fully Threaded	Standard	0.225"	0.067"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-21, SAE AMS2700	50	000000000	00000
1 1/4"	Fully Threaded	Standard	0.225"	0.067"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-22, SAE AMS2700	50	000000000	00000
1 1/2"	Fully Threaded	Standard	0.225"	0.067"	No. 1	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-23, SAE AMS2700	25	000000000	0000
6-32
3/16"	Fully Threaded	Undercut	0.279"	0.059"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-25, SAE AMS2700	25	000000000	0000
1/4"	Fully Threaded	Standard	0.279"	0.083"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-26, SAE AMS2700	50	000000000	0000
5/16"	Fully Threaded	Standard	0.279"	0.083"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-27, SAE AMS2700	50	000000000	00000
3/8"	Fully Threaded	Standard	0.279"	0.083"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-28, SAE AMS2700	50	000000000	00000
7/16"	Fully Threaded	Standard	0.279"	0.083"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-29, SAE AMS2700	50	000000000	0000
1/2"	Fully Threaded	Standard	0.279"	0.083"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-30, SAE AMS2700	50	000000000	00000
5/8"	Fully Threaded	Standard	0.279"	0.083"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-31, SAE AMS2700	50	000000000	00000
3/4"	Fully Threaded	Standard	0.279"	0.083"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-32, SAE AMS2700	50	000000000	00000
7/8"	Fully Threaded	Standard	0.279"	0.081"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-33, SAE AMS2700	50	000000000	00000
1"	Fully Threaded	Standard	0.279"	0.083"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-34, SAE AMS2700	25	000000000	00000
1 1/4"	Fully Threaded	Standard	0.279"	0.081"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-35, SAE AMS2700	25	000000000	00000
1 1/2"	Fully Threaded	Standard	0.279"	0.081"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-36, SAE AMS2700	25	000000000	00000
1 3/4"	Fully Threaded	Standard	0.279"	0.081"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-37, SAE AMS2700	25	000000000	00000
8-32
1/4"	Fully Threaded	Undercut	0.332"	0.07"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-41, SAE AMS2700	50	000000000	00000
5/16"	Fully Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-42, SAE AMS2700	50	000000000	0000
3/8"	Fully Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-43, SAE AMS2700	50	000000000	00000
7/16"	Fully Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-44, SAE AMS2700	50	000000000	00000
1/2"	Fully Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-45, SAE AMS2700	50	000000000	00000
5/8"	Fully Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-46, SAE AMS2700	50	000000000	00000
3/4"	Fully Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-47, SAE AMS2700	25	000000000	00000
7/8"	Fully Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-48, SAE AMS2700	25	000000000	00000
1"	Fully Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-49, SAE AMS2700	25	000000000	00000
1 1/4"	Fully Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-50, SAE AMS2700	25	000000000	00000
1 1/2"	Fully Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-51, SAE AMS2700	25	000000000	00000
1 3/4"	Fully Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-52, SAE AMS2700	10	000000000	0000
2"	Fully Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-53, SAE AMS2700	10	000000000	0000
2 1/4"	Partially Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-54, SAE AMS2700	10	000000000	00000
2 1/2"	Partially Threaded	Standard	0.332"	0.1"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-55, SAE AMS2700	10	000000000	00000
10-24
3/8"	Fully Threaded	Standard	0.385"	0.116"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-61, SAE AMS2700	25	000000000	00000
7/16"	Fully Threaded	Standard	0.385"	0.116"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-62, SAE AMS2700	25	000000000	00000
1/2"	Fully Threaded	Standard	0.385"	0.116"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-63, SAE AMS2700	25	000000000	00000
5/8"	Fully Threaded	Standard	0.385"	0.116"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-64, SAE AMS2700	25	000000000	00000
3/4"	Fully Threaded	Standard	0.385"	0.116"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-65, SAE AMS2700	25	000000000	00000
7/8"	Fully Threaded	Standard	0.385"	0.116"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-66, SAE AMS2700	25	000000000	00000
1"	Fully Threaded	Standard	0.385"	0.116"	No. 2	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-67, SAE AMS2700	25	000000000	00000
1/4"-20
3/8"	Fully Threaded	Undercut	0.507"	0.107"	No. 3	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-77, SAE AMS2700	10	000000000	00000
7/16"	Fully Threaded	Undercut	0.507"	0.107"	No. 3	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-78, SAE AMS2700	10	000000000	00000
1/2"	Fully Threaded	Standard	0.507"	0.153"	No. 3	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-79, SAE AMS2700	10	000000000	0000
5/8"	Fully Threaded	Standard	0.507"	0.153"	No. 3	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-80, SAE AMS2700	10	000000000	00000
3/4"	Fully Threaded	Standard	0.507"	0.153"	No. 3	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-81, SAE AMS2700	10	000000000	00000
7/8"	Fully Threaded	Standard	0.507"	0.153"	No. 3	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-82, SAE AMS2700	10	000000000	00000
1"	Fully Threaded	Standard	0.507"	0.153"	No. 3	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-83, SAE AMS2700	10	000000000	00000
1 1/4"	Fully Threaded	Standard	0.507"	0.153"	No. 3	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-84, SAE AMS2700	10	000000000	0000
1 1/2"	Fully Threaded	Standard	0.507"	0.153"	No. 3	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-85, SAE AMS2700	10	000000000	00000
1 3/4"	Fully Threaded	Standard	0.507"	0.153"	No. 3	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-86, SAE AMS2700	5	000000000	0000
2"	Fully Threaded	Standard	0.507"	0.153"	No. 3	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-87, SAE AMS2700	5	000000000	00000
2 1/2"	Partially Threaded	Standard	0.507"	0.153"	No. 3	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-89, SAE AMS2700	5	000000000	00000
3/8"-16
1"	Fully Threaded	Standard	0.762"	0.23"	No. 4	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-111, SAE AMS2700	5	000000000	00000
1 1/4"	Fully Threaded	Standard	0.762"	0.23"	No. 4	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-112, SAE AMS2700	5	000000000	00000
1 1/2"	Fully Threaded	Standard	0.762"	0.23"	No. 4	70,000	Fed. Spec. FF-S-92, Fed. Spec. QQ-P-35, MS51959-113, SAE AMS2700	5	000000000	0000

Email Us

About Flat Head Screws

Mil. Spec. Stainless Steel Phillips Flat Head Screws